Περιλαμβάνονται, με χρονολογική σειρά, δημοσιεύσεις στις οποίες έχουν χρησιμοποιηθεί δεδομένα από το εθνικό δίκτυο παρακολούθησης λιμνών.
Δημοσιεύσεις σε επιστημονικά περιοδικά
Papadimos, Dimitris; Papamichail, Dimitris
Performance Evaluation of a Distributed Hydrological Model Using Satellite Data over the Lake Kastoria Catchment, Greece Δημοσίευση σε επιστημονικό περιοδικό
In: Hydrology, vol. 13, iss. 2026, no. 1, 2025, ISSN: 2306-5338.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: GEOV3, GPM_3IMERGDF, Kastoria lake, MIKE HYDRO River, MIKE SHE, satellite LAI, satellite precipitation, spatially distributed hydrological modeling
@article{hydrology13010002,
title = {Performance Evaluation of a Distributed Hydrological Model Using Satellite Data over the Lake Kastoria Catchment, Greece},
author = {Papadimos, Dimitris and Papamichail, Dimitris},
editor = {Changsen Zhao},
url = {https://www.mdpi.com/2306-5338/13/1/2},
doi = {10.3390/hydrology13010002},
issn = {2306-5338},
year = {2025},
date = {2025-12-20},
urldate = {2025-12-20},
journal = {Hydrology},
volume = {13},
number = {1},
issue = {2026},
abstract = {It might be difficult in many countries to find extended time series of measurements related to parameters of lakes’ hydrology and their interactions with catchments. Nowadays, the combined use of satellite imagery and spatially distributed hydrological models may contribute substantially to this direction. In this study, in order to assess for a long period of years a lake’s surface elevation (LSE) and its water balance components, Lake Kastoria and its catchment, under Greece’s dry-thermal conditions, were selected as the case study. This research employed the MIKE SHE coupled with the MIKE HYDRO River (MHR) hydrological modeling system, fed with precipitation and leaf area index (LAI) data coming from a ground weather station, typical values of LAI for the specific area, and satellite products from NASA for the precipitation and from Copernicus Global Land Service for the LAI. In all cases where satellite data were used, the simulation of the long-term LSE was very satisfactory, with minor to medium changes to the inflow and outflow components of the water balance in both the catchment (from 0.32 to 7.36%) and the lake (from 1.47 to 11.3%). The above changes were also reflected in the runoff coefficients. In conclusion, the above satellite products can adequately be used for the prediction of the LSE. Furthermore, a plethora of quantified information in relation to the catchment’s water balance can be extracted and used in decision-making processes.},
keywords = {GEOV3, GPM_3IMERGDF, Kastoria lake, MIKE HYDRO River, MIKE SHE, satellite LAI, satellite precipitation, spatially distributed hydrological modeling},
pubstate = {published},
tppubtype = {article}
}
It might be difficult in many countries to find extended time series of measurements related to parameters of lakes’ hydrology and their interactions with catchments. Nowadays, the combined use of satellite imagery and spatially distributed hydrological models may contribute substantially to this direction. In this study, in order to assess for a long period of years a lake’s surface elevation (LSE) and its water balance components, Lake Kastoria and its catchment, under Greece’s dry-thermal conditions, were selected as the case study. This research employed the MIKE SHE coupled with the MIKE HYDRO River (MHR) hydrological modeling system, fed with precipitation and leaf area index (LAI) data coming from a ground weather station, typical values of LAI for the specific area, and satellite products from NASA for the precipitation and from Copernicus Global Land Service for the LAI. In all cases where satellite data were used, the simulation of the long-term LSE was very satisfactory, with minor to medium changes to the inflow and outflow components of the water balance in both the catchment (from 0.32 to 7.36%) and the lake (from 1.47 to 11.3%). The above changes were also reflected in the runoff coefficients. In conclusion, the above satellite products can adequately be used for the prediction of the LSE. Furthermore, a plethora of quantified information in relation to the catchment’s water balance can be extracted and used in decision-making processes.
Zioga, Marianthi; Kemitzoglou, Dimitra; Zerva, Ioanna; Katsavouni, Sotiria; Kagalou, Ifigenia; Tsiaoussi, Vasiliki
Establishing Total Phosphorus Boundaries to Support Good Ecological Status of Greek Lakes and Reservoirs in Accordance with the Water Framework Directive Δημοσίευση σε επιστημονικό περιοδικό
In: Water, vol. 17, iss. 23, no. 3349, 2025, ISSN: 2073-444.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: good ecological status, Greek lakes, nutrient boundaries, total phosphorus, water framework directive
@article{w17233349,
title = {Establishing Total Phosphorus Boundaries to Support Good Ecological Status of Greek Lakes and Reservoirs in Accordance with the Water Framework Directive},
author = {Marianthi Zioga and Dimitra Kemitzoglou and Ioanna Zerva and Sotiria Katsavouni and Ifigenia Kagalou and Vasiliki Tsiaoussi},
editor = {Xiaoxiao Wang},
url = {http://hdl.handle.net/11340/2144},
doi = {10.3390/w17233349},
issn = {2073-444},
year = {2025},
date = {2025-11-23},
urldate = {2025-11-23},
journal = {Water},
volume = {17},
number = {3349},
issue = {23},
abstract = {Eutrophication, driven by nutrient enrichment, represents substantial anthropogenic pressure with harmful consequences for aquatic ecosystems. The Water Framework Directive provides a structured approach to addressing this challenge as it requires European Union Member States to achieve at least good ecological status for their surface waters. The establishment of realistic nutrient boundaries, above which negative effects become pronounced, is essential to guide regulatory intervention aimed at securing long-term water sustainability in Europe. Greece is one of the Member States which should determine nutrient boundaries supporting the good ecological status of lakes. Two statistical approaches, ranged major axis regression and binomial logistic regression, were applied for setting appropriate nutrient boundaries for Greek natural lakes and reservoirs, using datasets of phytoplankton and total phosphorus concentrations, retrieved from the national monitoring program (2016–2023). The predicted boundary values for total phosphorus supporting good ecological status ranged from 32 to 76 μg/L, with stricter boundaries corresponding to deep lakes. Nutrient boundaries that reflect the environmental pressures on Greek natural lakes and reservoirs are fundamental to ensure proper design of lake management strategies.},
keywords = {good ecological status, Greek lakes, nutrient boundaries, total phosphorus, water framework directive},
pubstate = {published},
tppubtype = {article}
}
Eutrophication, driven by nutrient enrichment, represents substantial anthropogenic pressure with harmful consequences for aquatic ecosystems. The Water Framework Directive provides a structured approach to addressing this challenge as it requires European Union Member States to achieve at least good ecological status for their surface waters. The establishment of realistic nutrient boundaries, above which negative effects become pronounced, is essential to guide regulatory intervention aimed at securing long-term water sustainability in Europe. Greece is one of the Member States which should determine nutrient boundaries supporting the good ecological status of lakes. Two statistical approaches, ranged major axis regression and binomial logistic regression, were applied for setting appropriate nutrient boundaries for Greek natural lakes and reservoirs, using datasets of phytoplankton and total phosphorus concentrations, retrieved from the national monitoring program (2016–2023). The predicted boundary values for total phosphorus supporting good ecological status ranged from 32 to 76 μg/L, with stricter boundaries corresponding to deep lakes. Nutrient boundaries that reflect the environmental pressures on Greek natural lakes and reservoirs are fundamental to ensure proper design of lake management strategies.
Nikolopoulou, Iliana; Mavromati, Efpraxia; Moschandreou, Kimon; Navrozidou, Valentini; Kemitzoglou, Dimitra; Tsiaoussi, Vasiliki
Lake phytoplankton status and trends: a case study from Greek lakes, Eastern Mediterranean Δημοσίευση σε επιστημονικό περιοδικό
In: Environmental Monitoring and Assessment, vol. 197, no. 733, 2025, ISSN: 1573-2959, (The online version contains supplementary material.).
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Ecological status, Greek lakes, HeLPhy, Phytoplankton, Φυτοπλαγκτόν
@article{Nikolopoulou2025,
title = {Lake phytoplankton status and trends: a case study from Greek lakes, Eastern Mediterranean},
author = {Iliana Nikolopoulou and Efpraxia Mavromati and Kimon Moschandreou and Valentini Navrozidou and Dimitra Kemitzoglou and Vasiliki Tsiaoussi },
doi = {10.1007/s10661-025-14147-7},
issn = {1573-2959},
year = {2025},
date = {2025-06-05},
urldate = {2025-06-05},
journal = {Environmental Monitoring and Assessment},
volume = {197},
number = {733},
abstract = {Until now, little information was available regarding phytoplankton communities of Greek lakes. In this study, we present the first comprehensive analysis of phytoplankton composition and biovolume, as well as their inter-annual variations, across 15 natural lakes in Greece from 2016 to 2021. The ecological status and trends of these lakes were assessed using HeLPhy, a phytoplankton index of the Water Framework Directive (WFD). Additionally, this study examined potential similarities among lakes based on the number of phytoplankton taxa identified, the composition of phytoplankton communities, and the ecological classification. A total of 462 phytoplankton taxa from 10 taxonomic groups were recorded in 287 phytoplankton samples collected between 2016 and 2021. The phytoplankton communities in all lakes were dominated mainly by Cyanobacteria, Bacillariophyta, and Chlorophyta. The highest number of phytoplankton taxa was recorded in Chlorophyta and Cyanobacteria taxonomic groups. Based on the HeLPhy index, the lakes were classified into four ecological status classes: high, good, moderate, and poor. Inter-annual variations in ecological classification were observed. Eight of the 15 lakes were classified as having good or better ecological status according to WFD criteria, with deep lakes generally exhibiting a better status than shallow lakes. Bacillariophyta were more prevalent in lakes with high and good ecological status, while Cyanobacteria were more abundant in poor status lakes and dominated in bad status lake-years. Lakes in moderate and poor status exhibited higher total phytoplankton and Cyanobacteria biovolume values. This research improves our understanding of the status and temporal variations of phytoplankton communities in Greek lakes.},
note = {The online version contains supplementary material.},
keywords = {Ecological status, Greek lakes, HeLPhy, Phytoplankton, Φυτοπλαγκτόν},
pubstate = {published},
tppubtype = {article}
}
Until now, little information was available regarding phytoplankton communities of Greek lakes. In this study, we present the first comprehensive analysis of phytoplankton composition and biovolume, as well as their inter-annual variations, across 15 natural lakes in Greece from 2016 to 2021. The ecological status and trends of these lakes were assessed using HeLPhy, a phytoplankton index of the Water Framework Directive (WFD). Additionally, this study examined potential similarities among lakes based on the number of phytoplankton taxa identified, the composition of phytoplankton communities, and the ecological classification. A total of 462 phytoplankton taxa from 10 taxonomic groups were recorded in 287 phytoplankton samples collected between 2016 and 2021. The phytoplankton communities in all lakes were dominated mainly by Cyanobacteria, Bacillariophyta, and Chlorophyta. The highest number of phytoplankton taxa was recorded in Chlorophyta and Cyanobacteria taxonomic groups. Based on the HeLPhy index, the lakes were classified into four ecological status classes: high, good, moderate, and poor. Inter-annual variations in ecological classification were observed. Eight of the 15 lakes were classified as having good or better ecological status according to WFD criteria, with deep lakes generally exhibiting a better status than shallow lakes. Bacillariophyta were more prevalent in lakes with high and good ecological status, while Cyanobacteria were more abundant in poor status lakes and dominated in bad status lake-years. Lakes in moderate and poor status exhibited higher total phytoplankton and Cyanobacteria biovolume values. This research improves our understanding of the status and temporal variations of phytoplankton communities in Greek lakes.
Markogianni, Vassiliki; Kalivas, Dionissios P.; Petropoulos, George P.; Giovos, Rigas; Dimitriou, Elias
Comparative Analysis of Trophic Status Assessment Using Different Sensors and Atmospheric Correction Methods in Greece’s WFD Lake Network Δημοσίευση σε επιστημονικό περιοδικό
In: Remote Sensing, vol. 17, iss. 11, no. 1822, 2025, ISSN: 2072-4292.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: atmospheric correction (AC), Carlson’s Trophic State Index (TSI), GEE-platform, lake water quality, Landsat, Sentinel-2 imagery, WFD
@article{rs17111822,
title = {Comparative Analysis of Trophic Status Assessment Using Different Sensors and Atmospheric Correction Methods in Greece’s WFD Lake Network},
author = {Vassiliki Markogianni and Dionissios P. Kalivas and George P. Petropoulos and Rigas Giovos and Elias Dimitriou },
doi = {10.3390/rs17111822},
issn = {2072-4292},
year = {2025},
date = {2025-05-23},
urldate = {2025-05-23},
journal = {Remote Sensing},
volume = {17},
number = {1822},
issue = {11},
abstract = {Today, open-source Cloud Computing platforms are valuable for geospatial image analysis while the combination of the Google Earth Engine (GEE) platform and new satellite launches greatly facilitate the monitoring of national-scale lake Water Quality (WQ). The main aim of this research is to assess the transferability and performance of published general, natural-only and artificial-only lake WQ models (Chl-a, Secchi Disk Depth-SDD- and Total Phosphorus-TP) across Greece’s WFD (Water Framework Directive) lake sampling network. We utilized Landsat (7 ETM +/8 OLI) and Sentinel 2 surface reflectance (SR) data embedded in GEE, while subjected to different atmospheric correction (AC) methods. Subsequently, Carlson’s Trophic State Index (TSI) was calculated based on both in situ and modelled WQ values. Initially, WQ models employed both DOS1-corrected (Dark Object Subtraction 1; manually applied) and GEE-retrieved respective SR data from the year 2018. Double WQ values per lake station were inserted in a linear regression analysis to harmonize the AC differences, separately for Landsat and Sentinel 2 data. Yielded linear equations were accompanied by strong associations (R2 ranging from 0.68 to 0.98) while modelled and GEE-modelled TSI values were further validated based on reference in situ WQ datasets from the years 2019 and 2020. The values of the basic statistical error metrics indicated firstly the increased assessment’s accuracy of GEE-modelled over modelled TSIs and then the superiority of Landsat over Sentinel 2 data. In this way, the hereby adopted methodology was evolved into an efficient lake management tool by providing managers the means for integrated sustainable water resources management while contributing to saving valuable image pre-processing time.},
keywords = {atmospheric correction (AC), Carlson’s Trophic State Index (TSI), GEE-platform, lake water quality, Landsat, Sentinel-2 imagery, WFD},
pubstate = {published},
tppubtype = {article}
}
Today, open-source Cloud Computing platforms are valuable for geospatial image analysis while the combination of the Google Earth Engine (GEE) platform and new satellite launches greatly facilitate the monitoring of national-scale lake Water Quality (WQ). The main aim of this research is to assess the transferability and performance of published general, natural-only and artificial-only lake WQ models (Chl-a, Secchi Disk Depth-SDD- and Total Phosphorus-TP) across Greece’s WFD (Water Framework Directive) lake sampling network. We utilized Landsat (7 ETM +/8 OLI) and Sentinel 2 surface reflectance (SR) data embedded in GEE, while subjected to different atmospheric correction (AC) methods. Subsequently, Carlson’s Trophic State Index (TSI) was calculated based on both in situ and modelled WQ values. Initially, WQ models employed both DOS1-corrected (Dark Object Subtraction 1; manually applied) and GEE-retrieved respective SR data from the year 2018. Double WQ values per lake station were inserted in a linear regression analysis to harmonize the AC differences, separately for Landsat and Sentinel 2 data. Yielded linear equations were accompanied by strong associations (R2 ranging from 0.68 to 0.98) while modelled and GEE-modelled TSI values were further validated based on reference in situ WQ datasets from the years 2019 and 2020. The values of the basic statistical error metrics indicated firstly the increased assessment’s accuracy of GEE-modelled over modelled TSIs and then the superiority of Landsat over Sentinel 2 data. In this way, the hereby adopted methodology was evolved into an efficient lake management tool by providing managers the means for integrated sustainable water resources management while contributing to saving valuable image pre-processing time.
Perivolioti, Triantafyllia-Maria; Apostolakis, Antonis; Papadimos, Dimitris; Tsiaoussi, Vasiliki
Bathymetry and morphometric analysis of Greek natural lakes through a hybrid GIS-acoustic methodology Δημοσίευση σε επιστημονικό περιοδικό
In: Inland Waters, pp. 1-17, 2025.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: bathymetric digital terrain model, bathymetric surveys, inland waters, sonar, water framework directive
@article{Perivolioti03042025,
title = {Bathymetry and morphometric analysis of Greek natural lakes through a hybrid GIS-acoustic methodology},
author = {Triantafyllia-Maria Perivolioti and Antonis Apostolakis and Dimitris Papadimos and Vasiliki Tsiaoussi },
doi = {10.1080/20442041.2024.2447173},
year = {2025},
date = {2025-04-03},
urldate = {2025-04-03},
journal = {Inland Waters},
pages = {1-17},
abstract = {Homogeneous and up-to-date bathymetric information on lakes is essential to improve limnological knowledge and produce evidence-based lake monitoring, assessment methods, and river basin management plans according to Water Framework Directive (WFD). The present study focused on the production of updated bathymetric information on the main natural Greek lakes and their morphometric analysis. The aim was to address the knowledge gap by providing updated homogeneous and accurate bathymetric information for the main freshwater natural lakes of Greece as part of the National Monitoring Network of Lakes in the context of WFD. We surveyed 14 freshwater lakes in mainland Greece using a dual frequency echosounder. Using the acoustic data collected during the surveys, bathymetric digital terrain models (DTMs) were produced for each lake and used to estimate morphometric characteristics (mean/maximum depth, volume, lake depth ratio, volume development, mean lake diameter, relative depth ratio, shoreline development factor, hypsographic curve). This analysis demonstrated the potential of the morphometric approach to generate valuable information using up-to-date bathymetric DTMs. The geospatial data derived by the present study are available through an online repository, the Greek National Monitoring Network of Lakes (http://ekbygis.biodiversity-info.gr/geoserver/web/). These data provide a valuable database for the advancement of limnological knowledge, the implementation of comprehensive monitoring programmes, and informed decision making in water resources management.},
keywords = {bathymetric digital terrain model, bathymetric surveys, inland waters, sonar, water framework directive},
pubstate = {published},
tppubtype = {article}
}
Homogeneous and up-to-date bathymetric information on lakes is essential to improve limnological knowledge and produce evidence-based lake monitoring, assessment methods, and river basin management plans according to Water Framework Directive (WFD). The present study focused on the production of updated bathymetric information on the main natural Greek lakes and their morphometric analysis. The aim was to address the knowledge gap by providing updated homogeneous and accurate bathymetric information for the main freshwater natural lakes of Greece as part of the National Monitoring Network of Lakes in the context of WFD. We surveyed 14 freshwater lakes in mainland Greece using a dual frequency echosounder. Using the acoustic data collected during the surveys, bathymetric digital terrain models (DTMs) were produced for each lake and used to estimate morphometric characteristics (mean/maximum depth, volume, lake depth ratio, volume development, mean lake diameter, relative depth ratio, shoreline development factor, hypsographic curve). This analysis demonstrated the potential of the morphometric approach to generate valuable information using up-to-date bathymetric DTMs. The geospatial data derived by the present study are available through an online repository, the Greek National Monitoring Network of Lakes (http://ekbygis.biodiversity-info.gr/geoserver/web/). These data provide a valuable database for the advancement of limnological knowledge, the implementation of comprehensive monitoring programmes, and informed decision making in water resources management.
Perivolioti, Triantafyllia-Maria; Zachopoulos, Konstantinos; Zioga, Marianthi; Tompoulidou, Maria; Katsavouni, Sotiria; Kemitzoglou, Dimitra; Terzopoulos, Dimitrios; Mouratidis, Antonios; Tsiaoussi, Vasiliki
Monitoring the Impact of Floods on Water Quality Using Optical Remote Sensing Imagery: The Case of Lake Karla (Greece) Δημοσίευση σε επιστημονικό περιοδικό
In: Water, vol. 16, no. 23, 2024, ISSN: 2073-4441.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: investigative monitoring, Sentinel-2 imagery, Storm Daniel, Thessaly Plain flood, Water Quality
@article{w16233502,
title = {Monitoring the Impact of Floods on Water Quality Using Optical Remote Sensing Imagery: The Case of Lake Karla (Greece)},
author = {Triantafyllia-Maria Perivolioti and Konstantinos Zachopoulos and Marianthi Zioga and Maria Tompoulidou and Sotiria Katsavouni and Dimitra Kemitzoglou and Dimitrios Terzopoulos and Antonios Mouratidis and Vasiliki Tsiaoussi},
editor = {Juan Miguel Soria},
doi = {10.3390/w16233502},
issn = {2073-4441},
year = {2024},
date = {2024-12-05},
urldate = {2024-12-05},
journal = {Water},
volume = {16},
number = {23},
abstract = {This study investigates the performance of published bio-optical remote sensing indices/algorithms for monitoring water quality changes in Lake Karla, Greece, caused by Storm Daniel after the September 2023 flooding event. Commonly applied indices were utilised to estimate chlorophyll-a (Chl-a) and total suspended solids (TSS) using Sentinel-2 high-resolution optical imagery. In situ measurements were undertaken and water samples were collected during the pre-flooding period, post-flooding, and one-year post-flood, providing a basis for validating the remote sensing models. Monitoring results showed that most physicochemical parameters changed considerably. Chl-a and TSS were estimated by testing five and seven indices, respectively. Regarding the Chl-a estimation, the NDCI and 2-BDA indices outperformed other models, having high correlations with in situ Chl-a measurements and effectively following the in situ Chl-a temporal trends. Among the TSS indices, NDWI and TUR-IND demonstrated better performances, effectively capturing the variations in suspended solids. Overall, this study highlights the potential of Sentinel-2 imagery in assessing water quality changes, particularly in response to flooding events. It is an exploratory approach to assess the feasibility of utilising optical satellite data for evaluating the environmental impacts of natural disasters on lake water quality and supports decision-making in environmental management. Additionally, it identifies potential challenges and considerations that must be addressed to ensure effective application.},
keywords = {investigative monitoring, Sentinel-2 imagery, Storm Daniel, Thessaly Plain flood, Water Quality},
pubstate = {published},
tppubtype = {article}
}
This study investigates the performance of published bio-optical remote sensing indices/algorithms for monitoring water quality changes in Lake Karla, Greece, caused by Storm Daniel after the September 2023 flooding event. Commonly applied indices were utilised to estimate chlorophyll-a (Chl-a) and total suspended solids (TSS) using Sentinel-2 high-resolution optical imagery. In situ measurements were undertaken and water samples were collected during the pre-flooding period, post-flooding, and one-year post-flood, providing a basis for validating the remote sensing models. Monitoring results showed that most physicochemical parameters changed considerably. Chl-a and TSS were estimated by testing five and seven indices, respectively. Regarding the Chl-a estimation, the NDCI and 2-BDA indices outperformed other models, having high correlations with in situ Chl-a measurements and effectively following the in situ Chl-a temporal trends. Among the TSS indices, NDWI and TUR-IND demonstrated better performances, effectively capturing the variations in suspended solids. Overall, this study highlights the potential of Sentinel-2 imagery in assessing water quality changes, particularly in response to flooding events. It is an exploratory approach to assess the feasibility of utilising optical satellite data for evaluating the environmental impacts of natural disasters on lake water quality and supports decision-making in environmental management. Additionally, it identifies potential challenges and considerations that must be addressed to ensure effective application.
Tompoulidou, Maria; Karadimou, Elpida; Apostolakis, Antonis; Tsiaoussi, Vasiliki
A Geographic Object-Based Image Approach Based on the Sentinel-2 Multispectral Instrument for Lake Aquatic Vegetation Mapping: A Complementary Tool to In Situ Monitoring Δημοσίευση σε επιστημονικό περιοδικό
In: Remote Sensing, vol. 16, no. 5, 2024, ISSN: 2072-4292.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: aquatic vegetation, General Earth and Planetary Sciences, GEOBIA, lake monitoring, Mediterranean lakes, remote sensing, Sentinel-2 imagery, WFD
@article{Tompoulidou2024,
title = {A Geographic Object-Based Image Approach Based on the Sentinel-2 Multispectral Instrument for Lake Aquatic Vegetation Mapping: A Complementary Tool to In Situ Monitoring},
author = {Maria Tompoulidou and Elpida Karadimou and Antonis Apostolakis and Vasiliki Tsiaoussi},
doi = {10.3390/rs16050916},
issn = {2072-4292},
year = {2024},
date = {2024-03-05},
urldate = {2024-03-05},
journal = {Remote Sensing},
volume = {16},
number = {5},
publisher = {MDPI AG},
abstract = {Aquatic vegetation is an essential component of lake ecosystems, used as a biological indicator for in situ monitoring within the Water Framework Directive. We developed a hierarchical object-based image classification model with multi-seasonal Sentinel-2 imagery and suitable spectral indices in order to map the aquatic vegetation in a Mediterranean oligotrophic/mesotrophic deep lake; we then applied the model to another lake with similar abiotic and biotic characteristics. Field data from a survey of aquatic macrophytes, undertaken on the same dates as EO data, were used within the accuracy assessment. The aquatic vegetation was discerned into three classes: emergent, floating, and submerged aquatic vegetation. Geographic object-based image analysis (GEOBIA) proved to be effective in discriminating the three classes in both study areas. Results showed high effectiveness of the classification model in terms of overall accuracy, particularly for the emergent and floating classes. In the case of submerged aquatic vegetation, challenges in their classification prompted us to establish specific criteria for their accurate detection. Overall results showed that GEOBIA based on spectral indices was suitable for mapping aquatic vegetation in oligotrophic/mesotrophic deep lakes. EO data can contribute to large-scale coverage and high-frequency monitoring requirements, being a complementary tool to in situ monitoring.},
keywords = {aquatic vegetation, General Earth and Planetary Sciences, GEOBIA, lake monitoring, Mediterranean lakes, remote sensing, Sentinel-2 imagery, WFD},
pubstate = {published},
tppubtype = {article}
}
Aquatic vegetation is an essential component of lake ecosystems, used as a biological indicator for in situ monitoring within the Water Framework Directive. We developed a hierarchical object-based image classification model with multi-seasonal Sentinel-2 imagery and suitable spectral indices in order to map the aquatic vegetation in a Mediterranean oligotrophic/mesotrophic deep lake; we then applied the model to another lake with similar abiotic and biotic characteristics. Field data from a survey of aquatic macrophytes, undertaken on the same dates as EO data, were used within the accuracy assessment. The aquatic vegetation was discerned into three classes: emergent, floating, and submerged aquatic vegetation. Geographic object-based image analysis (GEOBIA) proved to be effective in discriminating the three classes in both study areas. Results showed high effectiveness of the classification model in terms of overall accuracy, particularly for the emergent and floating classes. In the case of submerged aquatic vegetation, challenges in their classification prompted us to establish specific criteria for their accurate detection. Overall results showed that GEOBIA based on spectral indices was suitable for mapping aquatic vegetation in oligotrophic/mesotrophic deep lakes. EO data can contribute to large-scale coverage and high-frequency monitoring requirements, being a complementary tool to in situ monitoring.
Doulgeris, Charalampos; Ntislidou, Chrysoula; Petriki, Olga; Zervas, Dimitrios; Nikolaidou, Rafaela; Bobori, Dimitra C.
Assessment of Environmentally Minimum Water Level in a Mediterranean Lake Using Morphological, Hydrological and Biological Factors Δημοσίευση σε επιστημονικό περιοδικό
In: Sustainability, vol. 16, no. 2, 2024, ISSN: 2071-1050.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Building and Construction, Geography, Management, Monitoring, Planning and Development, Policy and Law, Renewable Energy, Sustainability and the Environment
@article{Doulgeris2024,
title = {Assessment of Environmentally Minimum Water Level in a Mediterranean Lake Using Morphological, Hydrological and Biological Factors},
author = {Charalampos Doulgeris and Chrysoula Ntislidou and Olga Petriki and Dimitrios Zervas and Rafaela Nikolaidou and Dimitra C. Bobori},
doi = {10.3390/su16020933},
issn = {2071-1050},
year = {2024},
date = {2024-01-22},
urldate = {2024-01-22},
journal = {Sustainability},
volume = {16},
number = {2},
publisher = {MDPI AG},
abstract = {Water resources management requires comprehensive and integrated approaches that jointly consider hydrological, ecological and social factors. The assessment of lakes’ environmentally minimum water level is a critical tool for the sustainable management and protection of their ecosystems. This work combines the morphological, hydrological and biological factors of a Mediterranean lake (Lake Volvi, northern Greece) to assess its environmentally minimum water level. Initially, the morphological characteristics of the lake’s bottom were analyzed, with consideration given to the protection of the lake’s ecosystem and to the need to meet the water requirements for economic activities. Then, a hydromorphological analysis was conducted, relying on the surface water inflows to the lake from its hydrological catchment and the lake’s water level -volume relationship. In addition, the water level requirements of the biological communities of macrophytes, benthic macroinvertebrates, and fish, as revealed after samplings were taken from the lake’s littoral zone, are considered. Based on the above methodologies, the environmentally minimum water level of Lake Volvi is proposed to be lowered by as much as 35.8 m from February to May and 35.3 m from June to January in order to maintain the ecological integrity of the lake and the sustainable use of its water resources. The present study establishes a foundation for informed water resource management; however, ongoing research can improve methodologies and address emerging questions, fostering advancements in sustainable water management practices.},
keywords = {Building and Construction, Geography, Management, Monitoring, Planning and Development, Policy and Law, Renewable Energy, Sustainability and the Environment},
pubstate = {published},
tppubtype = {article}
}
Water resources management requires comprehensive and integrated approaches that jointly consider hydrological, ecological and social factors. The assessment of lakes’ environmentally minimum water level is a critical tool for the sustainable management and protection of their ecosystems. This work combines the morphological, hydrological and biological factors of a Mediterranean lake (Lake Volvi, northern Greece) to assess its environmentally minimum water level. Initially, the morphological characteristics of the lake’s bottom were analyzed, with consideration given to the protection of the lake’s ecosystem and to the need to meet the water requirements for economic activities. Then, a hydromorphological analysis was conducted, relying on the surface water inflows to the lake from its hydrological catchment and the lake’s water level -volume relationship. In addition, the water level requirements of the biological communities of macrophytes, benthic macroinvertebrates, and fish, as revealed after samplings were taken from the lake’s littoral zone, are considered. Based on the above methodologies, the environmentally minimum water level of Lake Volvi is proposed to be lowered by as much as 35.8 m from February to May and 35.3 m from June to January in order to maintain the ecological integrity of the lake and the sustainable use of its water resources. The present study establishes a foundation for informed water resource management; however, ongoing research can improve methodologies and address emerging questions, fostering advancements in sustainable water management practices.
Mavromati, Efpraxia; Kemitzoglou, Dimitra; Tsiaoussi, Vasiliki
Does littoral substrate affect macroinvertebrate assemblages in Mediterranean lakes? Δημοσίευση σε επιστημονικό περιοδικό
In: Aquat Ecol, vol. 57, no. 3, pp. 667–679, 2023, ISSN: 1573-5125.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Aquatic Science, Behavior and Systematics, Ecology, Evolution
@article{Mavromati2023,
title = {Does littoral substrate affect macroinvertebrate assemblages in Mediterranean lakes?},
author = {Efpraxia Mavromati and Dimitra Kemitzoglou and Vasiliki Tsiaoussi},
doi = {10.1007/s10452-023-10037-7},
issn = {1573-5125},
year = {2023},
date = {2023-06-05},
journal = {Aquat Ecol},
volume = {57},
number = {3},
pages = {667--679},
publisher = {Springer Science and Business Media LLC},
abstract = {The objective of this study was to investigate the effects of substrate type in macroinvertebrate assemblages in Mediterranean lakes. Samplings have taken place in the littoral zone of 21 lakes in Greece, between 2015 and 2018. We compared benthic macroinvertebrate assemblages among three substrate types of their littoral zones; sandy, covered with macrophytes and stony substrate. Benthic macroinvertebrate assemblages at sites with extended macrophyte cover differed only slightly in composition and abundance from the ones found in stony and sandy substrates. Coenagrionidae were indicative of sites covered with macrophytes and Oligochaeta and Erpobdellidae were representative of stony substrates. The type of substrate proved to be a statistically significant factor influencing the number of benthic macroinvertebrate taxa, the relative abundance of Oligochaeta and the relative abundance of Odonata. In the context of designing site-adapted management measures, priority could be given to the conservation and restoration of aquatic vegetation in lake littoral zones, which host rich macroinvertebrate assemblages with abundant taxa of Odonata.},
keywords = {Aquatic Science, Behavior and Systematics, Ecology, Evolution},
pubstate = {published},
tppubtype = {article}
}
The objective of this study was to investigate the effects of substrate type in macroinvertebrate assemblages in Mediterranean lakes. Samplings have taken place in the littoral zone of 21 lakes in Greece, between 2015 and 2018. We compared benthic macroinvertebrate assemblages among three substrate types of their littoral zones; sandy, covered with macrophytes and stony substrate. Benthic macroinvertebrate assemblages at sites with extended macrophyte cover differed only slightly in composition and abundance from the ones found in stony and sandy substrates. Coenagrionidae were indicative of sites covered with macrophytes and Oligochaeta and Erpobdellidae were representative of stony substrates. The type of substrate proved to be a statistically significant factor influencing the number of benthic macroinvertebrate taxa, the relative abundance of Oligochaeta and the relative abundance of Odonata. In the context of designing site-adapted management measures, priority could be given to the conservation and restoration of aquatic vegetation in lake littoral zones, which host rich macroinvertebrate assemblages with abundant taxa of Odonata.
Kelly, Martyn; Juggins, Steve; Moschandreou, Kimon; Kemitzoglou, Dimitra; Tsiaoussi, Vasiliki
Development of novel diatom metrics to assess ecological status of phytobenthos in Greek lakes Δημοσίευση σε επιστημονικό περιοδικό
In: Ecological Indicators, vol. 147, 2023, ISSN: 1470-160X.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Behavior and Systematics, Ecology, Evolution, General Decision Sciences
@article{Kelly2023,
title = {Development of novel diatom metrics to assess ecological status of phytobenthos in Greek lakes},
author = {Martyn Kelly and Steve Juggins and Kimon Moschandreou and Dimitra Kemitzoglou and Vasiliki Tsiaoussi},
doi = {10.1016/j.ecolind.2023.109974},
issn = {1470-160X},
year = {2023},
date = {2023-02-16},
journal = {Ecological Indicators},
volume = {147},
publisher = {Elsevier BV},
abstract = {Mediterranean lakes present particular challenges when developing ecological assessment techniques, due partly to long histories of human activity in their catchments but also to strong interactions with climate, intensifying in recent decades due to global warming. A survey of diatoms in lakes in Greece revealed both a strong nutrient gradient and a salinity gradient. It is necessary to disentangle these when assessing ecological status in order that appropriate measures for restoring good ecological status are applied. Two approaches were used to develop a Water Framework Directive-compatible metric for assessing ecological status using diatoms. The strongest relationship was obtained using weighted averaging, but an alternative metric, generated by rescaling a well-established and widely used diatom metric performed only slightly less well. The limited number of lakes in Greece resulted in a small dataset, creating a risk of overfitting models and the rescaled metric has the advantage of drawing on a broader autecological knowledge base. Supplementary metrics to evaluate salinity are also proposed in order to ensure that lakes subject to this pressure are clearly differentiated from those where nutrient impacts predominate. Approaches to defining reference conditions and status class boundaries draw on established criteria developed for Water Framework Assessments in Europe to ensure that status assessments in Greece reflect similar levels of ambition to those established elsewhere in the European Union.},
keywords = {Behavior and Systematics, Ecology, Evolution, General Decision Sciences},
pubstate = {published},
tppubtype = {article}
}
Mediterranean lakes present particular challenges when developing ecological assessment techniques, due partly to long histories of human activity in their catchments but also to strong interactions with climate, intensifying in recent decades due to global warming. A survey of diatoms in lakes in Greece revealed both a strong nutrient gradient and a salinity gradient. It is necessary to disentangle these when assessing ecological status in order that appropriate measures for restoring good ecological status are applied. Two approaches were used to develop a Water Framework Directive-compatible metric for assessing ecological status using diatoms. The strongest relationship was obtained using weighted averaging, but an alternative metric, generated by rescaling a well-established and widely used diatom metric performed only slightly less well. The limited number of lakes in Greece resulted in a small dataset, creating a risk of overfitting models and the rescaled metric has the advantage of drawing on a broader autecological knowledge base. Supplementary metrics to evaluate salinity are also proposed in order to ensure that lakes subject to this pressure are clearly differentiated from those where nutrient impacts predominate. Approaches to defining reference conditions and status class boundaries draw on established criteria developed for Water Framework Assessments in Europe to ensure that status assessments in Greece reflect similar levels of ambition to those established elsewhere in the European Union.
Papadimos, Dimitris; Demertzi, Kleoniki; Papamichail, Dimitris
Assessing Lake Response to Extreme Climate Change Using the Coupled MIKE SHE/MIKE 11 Model: Case Study of Lake Zazari in Greece Δημοσίευση σε επιστημονικό περιοδικό
In: Water, vol. 14, no. 6, 2022, ISSN: 2073-4441.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology
@article{Papadimos2022,
title = {Assessing Lake Response to Extreme Climate Change Using the Coupled MIKE SHE/MIKE 11 Model: Case Study of Lake Zazari in Greece},
author = {Dimitris Papadimos and Kleoniki Demertzi and Dimitris Papamichail},
doi = {10.3390/w14060921},
issn = {2073-4441},
year = {2022},
date = {2022-03-15},
journal = {Water},
volume = {14},
number = {6},
publisher = {MDPI AG},
abstract = {Lakes, either artificial or natural, are greatly important as a component in their catchments’ hydrology, but also as ecosystem service providers. However, due to climate change, they have begun to face numerous problems with their water quality and quantity. Furthermore, general circulation models (GCMs) show future climate change with a reduction in rainfall and increase in temperature. The aim of the current study is to present an application where GCMs and state-of-the-art hydrological modelling system MIKE SHE/MIKE 11 are combined for assessing the response of a Greek lake in terms of its water balance and water level under climate change. Four general circulation models (GCMs; GFDL-CM3, MIROC-ESM-CHEM, MIROC-ESM, IPSL-CM5A-LR) for the extreme climate change scenario of RCP8.5 were used in the basin of Lake Zazari in Greece as a case study. Results showed that, by keeping the irrigated demands (the main water user) unchanged in the future, the lake exhibited a lower water level for all GCMs, fluctuating from −0.70 to −1.8 m for the mean (min) water level and from −0.30 to −1.20 m for the mean (max) water level. Instead of the above and by preserving the amount of withdraw water n from the lake at a certain percentage of inflows, the irrigated area should be reduced from 54.1% to 64.05% depending on the circulation model.},
keywords = {Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology},
pubstate = {published},
tppubtype = {article}
}
Lakes, either artificial or natural, are greatly important as a component in their catchments’ hydrology, but also as ecosystem service providers. However, due to climate change, they have begun to face numerous problems with their water quality and quantity. Furthermore, general circulation models (GCMs) show future climate change with a reduction in rainfall and increase in temperature. The aim of the current study is to present an application where GCMs and state-of-the-art hydrological modelling system MIKE SHE/MIKE 11 are combined for assessing the response of a Greek lake in terms of its water balance and water level under climate change. Four general circulation models (GCMs; GFDL-CM3, MIROC-ESM-CHEM, MIROC-ESM, IPSL-CM5A-LR) for the extreme climate change scenario of RCP8.5 were used in the basin of Lake Zazari in Greece as a case study. Results showed that, by keeping the irrigated demands (the main water user) unchanged in the future, the lake exhibited a lower water level for all GCMs, fluctuating from −0.70 to −1.8 m for the mean (min) water level and from −0.30 to −1.20 m for the mean (max) water level. Instead of the above and by preserving the amount of withdraw water n from the lake at a certain percentage of inflows, the irrigated area should be reduced from 54.1% to 64.05% depending on the circulation model.
Markogianni, Vassiliki; Kalivas, Dionissios; Petropoulos, George P.; Dimitriou, Elias
Modelling of Greek Lakes Water Quality Using Earth Observation in the Framework of the Water Framework Directive (WFD) Δημοσίευση σε επιστημονικό περιοδικό
In: Remote Sensing, vol. 14, no. 3, 2022, ISSN: 2072-4292.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: General Earth and Planetary Sciences
@article{Markogianni2022,
title = {Modelling of Greek Lakes Water Quality Using Earth Observation in the Framework of the Water Framework Directive (WFD)},
author = {Vassiliki Markogianni and Dionissios Kalivas and George P. Petropoulos and Elias Dimitriou},
doi = {10.3390/rs14030739},
issn = {2072-4292},
year = {2022},
date = {2022-02-04},
journal = {Remote Sensing},
volume = {14},
number = {3},
publisher = {MDPI AG},
abstract = {Given the great importance of lakes in Earth’s environment and human life, continuous water quality (WQ) monitoring within the frame of the Water Framework Directive (WFD) is the most crucial aspect for lake management. In this study, Earth Observation (EO) data from Landsat 7 Enhanced Thematic Mapper Plus (ETM+) and Landsat 8 Operational Land Imager (OLI) sensors have been combined with co-orbital in situ measurements from 50 lakes located in Greece with the main objective of delivering robust WQ assessment models. Correlation analysis among in situ co-orbital WQ data (Chlorophylla, Secchi depths, Total phosphorus-TP-) contributed to distinguishing their inter-relationships and improving the WQ models’ accuracy. Subsequently, stepwise multiple regression analysis (MLR) of the available TP and Secchi depth datasets was implemented to explore the potential to establish optimal quantitative models regardless of lake characteristics. Then, further MLR analysis concerning whether the lakes are natural or artificial was conducted with the basic aim of generating different remote sensing derived models for different types of lakes, while their combination was further utilized to assess their trophic status. Correlation matrix results showed a high and positive relationship between TP and Chlorophyll-a (0.85), whereas high negative relationships were found between Secchi depth with TP (−0.84) and Chlorophyll-a (−0.83). MLRs among Landsat data and Secchi depths resulted in 3 optimal models concerning the assessment of Secchi depth of all lakes (Secchigeneral; R = 0.78; RMSE = 0.24 m), natural (Secchinatural; R = 0.95; RMSE = 0.14 m) and artificial (Secchiartificial; R = 0.62; RMSE = 0.1 m), with reliable accuracy. Study findings showed that TP-related MLR analyses failed to deliver a statistically acceptable model for the reservoirs; nevertheless, they delivered a robust TPgeneral (R = 0.71; RMSE = 1.41 mg/L) and TPnatural model (R = 0.93; RMSE = 1.43 mg/L). Subsequently, trophic status classification was conducted herein, calculating Carlson’s Trophic State Index (TSI) initially throughout all lakes and then oriented toward natural-only and artificial-only lakes. Those three types of TSI (general, natural, artificial) were calculated based on previously published satellite-derived Chlorophyll-a (Chl-a) assessment models and the hereby specially designed WQ models (Secchi depth, TP). The higher deviation of satellite-derived TSI values in relation to in situ ones was detected in reservoirs and shallower lakes (mean depth < 5 m), indicating noticeable divergences among natural and artificial lakes. All in all, the study findings provide important support toward the perpetual WQ monitoring and trophic status prediction of Greek lakes and, by extension, their sustainable management, particularly in cases when ground truth data is limited.},
keywords = {General Earth and Planetary Sciences},
pubstate = {published},
tppubtype = {article}
}
Given the great importance of lakes in Earth’s environment and human life, continuous water quality (WQ) monitoring within the frame of the Water Framework Directive (WFD) is the most crucial aspect for lake management. In this study, Earth Observation (EO) data from Landsat 7 Enhanced Thematic Mapper Plus (ETM+) and Landsat 8 Operational Land Imager (OLI) sensors have been combined with co-orbital in situ measurements from 50 lakes located in Greece with the main objective of delivering robust WQ assessment models. Correlation analysis among in situ co-orbital WQ data (Chlorophylla, Secchi depths, Total phosphorus-TP-) contributed to distinguishing their inter-relationships and improving the WQ models’ accuracy. Subsequently, stepwise multiple regression analysis (MLR) of the available TP and Secchi depth datasets was implemented to explore the potential to establish optimal quantitative models regardless of lake characteristics. Then, further MLR analysis concerning whether the lakes are natural or artificial was conducted with the basic aim of generating different remote sensing derived models for different types of lakes, while their combination was further utilized to assess their trophic status. Correlation matrix results showed a high and positive relationship between TP and Chlorophyll-a (0.85), whereas high negative relationships were found between Secchi depth with TP (−0.84) and Chlorophyll-a (−0.83). MLRs among Landsat data and Secchi depths resulted in 3 optimal models concerning the assessment of Secchi depth of all lakes (Secchigeneral; R = 0.78; RMSE = 0.24 m), natural (Secchinatural; R = 0.95; RMSE = 0.14 m) and artificial (Secchiartificial; R = 0.62; RMSE = 0.1 m), with reliable accuracy. Study findings showed that TP-related MLR analyses failed to deliver a statistically acceptable model for the reservoirs; nevertheless, they delivered a robust TPgeneral (R = 0.71; RMSE = 1.41 mg/L) and TPnatural model (R = 0.93; RMSE = 1.43 mg/L). Subsequently, trophic status classification was conducted herein, calculating Carlson’s Trophic State Index (TSI) initially throughout all lakes and then oriented toward natural-only and artificial-only lakes. Those three types of TSI (general, natural, artificial) were calculated based on previously published satellite-derived Chlorophyll-a (Chl-a) assessment models and the hereby specially designed WQ models (Secchi depth, TP). The higher deviation of satellite-derived TSI values in relation to in situ ones was detected in reservoirs and shallower lakes (mean depth < 5 m), indicating noticeable divergences among natural and artificial lakes. All in all, the study findings provide important support toward the perpetual WQ monitoring and trophic status prediction of Greek lakes and, by extension, their sustainable management, particularly in cases when ground truth data is limited.
Mavromati, Efpraxia; Kemitzoglou, Dimitra; Tsiaoussi, Vasiliki; Lazaridou, Maria
A new WFD—compliant littoral macroinvertebrate index for monitoring and assessment of Mediterranean lakes (HeLLBI) Δημοσίευση σε επιστημονικό περιοδικό
In: Environ Monit Assess, vol. 193, no. 11, 2021, ISSN: 1573-2959.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: General Environmental Science, General Medicine, Management, Monitoring, Policy and Law, Pollution
@article{Mavromati2021,
title = {A new WFD—compliant littoral macroinvertebrate index for monitoring and assessment of Mediterranean lakes (HeLLBI)},
author = {Efpraxia Mavromati and Dimitra Kemitzoglou and Vasiliki Tsiaoussi and Maria Lazaridou},
doi = {10.1007/s10661-021-09493-1},
issn = {1573-2959},
year = {2021},
date = {2021-10-23},
journal = {Environ Monit Assess},
volume = {193},
number = {11},
publisher = {Springer Science and Business Media LLC},
abstract = {A new multimetric index (HeLLBI) based on littoral benthic macroinvertebrates is presented in this paper for classification of Greek natural lakes, in compliance with the requirements of Water Framework Directive (WFD). The method was developed based on the collection of littoral benthic invertebrate fauna and environmental data from 109 sampling sites in 21 natural lakes of the Greek National Water Monitoring Network. We focused the analysis on the effects of shore morphological alterations and eutrophication to the littoral invertebrate fauna, identified to family level, except oligochaetes, which were identified as a class, and more particularly to taxonomic composition and abundance, to taxa sensitivity, and to richness/diversity. Three metrics were included in the multimeric index: the relative abundance of Odonata classes, the Average Score per Taxon, and the Simpson’s diversity index. The metrics were converted to ecological quality ratios and ecological class boundaries were defined. The final multimetric index HeLLBI is expressed as an arithmetic average of normalized ecological quality ratios of the above metrics and a final score was assigned to each lake. Pressure-response relationships of HeLLBI scores were statistically tested for morphological alterations, expressed as percentage of artificial shoreline, and eutrophication, expressed as total phosphorus. The HeLLBI scores correspond to ecological classes, according to WFD, and sampling sites with different ecological status contained distinct biological communities; those at high status where more diverse and with sensitive taxa and as the water quality deteriorated, macroinvertebrate assemblages consisted of fewer and more tolerant to degradation taxa. The HeLLBI method gave a reliable assessment of littoral benthic invertebrate fauna of Greek natural lakes and could be a useful tool for the classification of ecological status of other Mediterranean lakes.},
keywords = {General Environmental Science, General Medicine, Management, Monitoring, Policy and Law, Pollution},
pubstate = {published},
tppubtype = {article}
}
A new multimetric index (HeLLBI) based on littoral benthic macroinvertebrates is presented in this paper for classification of Greek natural lakes, in compliance with the requirements of Water Framework Directive (WFD). The method was developed based on the collection of littoral benthic invertebrate fauna and environmental data from 109 sampling sites in 21 natural lakes of the Greek National Water Monitoring Network. We focused the analysis on the effects of shore morphological alterations and eutrophication to the littoral invertebrate fauna, identified to family level, except oligochaetes, which were identified as a class, and more particularly to taxonomic composition and abundance, to taxa sensitivity, and to richness/diversity. Three metrics were included in the multimeric index: the relative abundance of Odonata classes, the Average Score per Taxon, and the Simpson’s diversity index. The metrics were converted to ecological quality ratios and ecological class boundaries were defined. The final multimetric index HeLLBI is expressed as an arithmetic average of normalized ecological quality ratios of the above metrics and a final score was assigned to each lake. Pressure-response relationships of HeLLBI scores were statistically tested for morphological alterations, expressed as percentage of artificial shoreline, and eutrophication, expressed as total phosphorus. The HeLLBI scores correspond to ecological classes, according to WFD, and sampling sites with different ecological status contained distinct biological communities; those at high status where more diverse and with sensitive taxa and as the water quality deteriorated, macroinvertebrate assemblages consisted of fewer and more tolerant to degradation taxa. The HeLLBI method gave a reliable assessment of littoral benthic invertebrate fauna of Greek natural lakes and could be a useful tool for the classification of ecological status of other Mediterranean lakes.
Zervas, Dimitrios; Tsiaoussi, Vasiliki; Kallimanis, Athanasios S.; Dimopoulos, Panayotis; Bergmeier, Erwin; Tsiripidis, Ioannis
Multiple-Facet Diversity Patterns of Aquatic Vegetation in Lakes along a Trophic Gradient Δημοσίευση σε επιστημονικό περιοδικό
In: Water, vol. 13, no. 16, 2021, ISSN: 2073-4441.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology
@article{Zervas2021,
title = {Multiple-Facet Diversity Patterns of Aquatic Vegetation in Lakes along a Trophic Gradient},
author = {Dimitrios Zervas and Vasiliki Tsiaoussi and Athanasios S. Kallimanis and Panayotis Dimopoulos and Erwin Bergmeier and Ioannis Tsiripidis},
doi = {10.3390/w13162281},
issn = {2073-4441},
year = {2021},
date = {2021-08-20},
journal = {Water},
volume = {13},
number = {16},
publisher = {MDPI AG},
abstract = {The EU Water Framework Directive foresees the ecological assessment of surface waters against identified pressures. Nutrient loading is the main pressure impairing the ecological quality of lake ecosystems, and aquatic macrophytes are considered good indicators of ecological response. In this study, we statistically assessed different aspects of aquatic plant (macrophyte) diversity in response to different trophic levels in Mediterranean lakes. We used 5690 relevés of aquatic vegetation, distributed over 305 transects, sampled in 18 freshwater lake ecosystems during 2013–2016. Our results show a significant decrease in taxonomic alpha diversity in lakes with a total phosphorus content above 100 μg/L. Syntaxonomic diversity followed the species richness pattern as well. Functional richness decreased along the trophic gradient, while functional dispersion was higher in lakes with high trophic levels. Taxonomic and functional beta partitioning presented changes in assembly processes leading to greater community homogeneity in lakes with higher trophic levels. In summary, we found no redundancy between taxonomic and functional diversity indices. These results provide novel insights into aquatic plant assembly processes of impacted freshwater lakes needed to forward conservation and restoration practices.},
keywords = {Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology},
pubstate = {published},
tppubtype = {article}
}
The EU Water Framework Directive foresees the ecological assessment of surface waters against identified pressures. Nutrient loading is the main pressure impairing the ecological quality of lake ecosystems, and aquatic macrophytes are considered good indicators of ecological response. In this study, we statistically assessed different aspects of aquatic plant (macrophyte) diversity in response to different trophic levels in Mediterranean lakes. We used 5690 relevés of aquatic vegetation, distributed over 305 transects, sampled in 18 freshwater lake ecosystems during 2013–2016. Our results show a significant decrease in taxonomic alpha diversity in lakes with a total phosphorus content above 100 μg/L. Syntaxonomic diversity followed the species richness pattern as well. Functional richness decreased along the trophic gradient, while functional dispersion was higher in lakes with high trophic levels. Taxonomic and functional beta partitioning presented changes in assembly processes leading to greater community homogeneity in lakes with higher trophic levels. In summary, we found no redundancy between taxonomic and functional diversity indices. These results provide novel insights into aquatic plant assembly processes of impacted freshwater lakes needed to forward conservation and restoration practices.
Latinopoulos, Dionissis; Spiliotis, Mike; Ntislidou, Chrysoula; Kagalou, Ifigenia; Bobori, Dimitra; Tsiaoussi, Vasiliki; Lazaridou, Maria
“One Out–All Out” Principle in the Water Framework Directive 2000—A New Approach with Fuzzy Method on an Example of Greek Lakes Δημοσίευση σε επιστημονικό περιοδικό
In: Water, vol. 13, no. 13, 2021, ISSN: 2073-4441.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology
@article{Latinopoulos2021,
title = {“One Out–All Out” Principle in the Water Framework Directive 2000—A New Approach with Fuzzy Method on an Example of Greek Lakes},
author = {Dionissis Latinopoulos and Mike Spiliotis and Chrysoula Ntislidou and Ifigenia Kagalou and Dimitra Bobori and Vasiliki Tsiaoussi and Maria Lazaridou},
doi = {10.3390/w13131776},
issn = {2073-4441},
year = {2021},
date = {2021-06-27},
journal = {Water},
volume = {13},
number = {13},
publisher = {MDPI AG},
abstract = {The “One Out–All Out” (OOAO) principle imposed by the WFD selects the worst ecological status assessed by different biological quality elements (BQEs). Since it is a precautionary rule that can lead to problems of underestimation of the overall status, its amendment has been a matter of debate for WFD 20+. The use of fuzzy methods that express the functional relationships between variables in ecology and management has been gaining more ground recently. Here is attempted the inclusion of a fuzzy regression among the frequently monitored BQE (phytoplankton) and the outcome of OOAO application in six Greek lakes. The latter was determined by the comparison of four BQE indices in order to assess the extent to which BQEs might underpin the optimal/actual qualitative classification of a waterbody. This approach encompasses the uncertainty and the possibility to broaden the acceptable final EQR based on the character and status of each lake. We concluded that the fuzzy OOAO is an approach that seems to allow a better understanding of the WFD implementation and case-specific evaluation, including the uncertainty in classification as an asset. Moreover, it offers a deeper understanding through self-learning processes based on the existing datasets.},
keywords = {Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology},
pubstate = {published},
tppubtype = {article}
}
The “One Out–All Out” (OOAO) principle imposed by the WFD selects the worst ecological status assessed by different biological quality elements (BQEs). Since it is a precautionary rule that can lead to problems of underestimation of the overall status, its amendment has been a matter of debate for WFD 20+. The use of fuzzy methods that express the functional relationships between variables in ecology and management has been gaining more ground recently. Here is attempted the inclusion of a fuzzy regression among the frequently monitored BQE (phytoplankton) and the outcome of OOAO application in six Greek lakes. The latter was determined by the comparison of four BQE indices in order to assess the extent to which BQEs might underpin the optimal/actual qualitative classification of a waterbody. This approach encompasses the uncertainty and the possibility to broaden the acceptable final EQR based on the character and status of each lake. We concluded that the fuzzy OOAO is an approach that seems to allow a better understanding of the WFD implementation and case-specific evaluation, including the uncertainty in classification as an asset. Moreover, it offers a deeper understanding through self-learning processes based on the existing datasets.
Zervou, Sevasti-Kiriaki; Moschandreou, Kimon; Paraskevopoulou, Aikaterina; Christophoridis, Christophoros; Grigoriadou, Elpida; Kaloudis, Triantafyllos; Triantis, Theodoros M.; Tsiaoussi, Vasiliki; Hiskia, Anastasia
Cyanobacterial Toxins and Peptides in Lake Vegoritis, Greece Δημοσίευση σε επιστημονικό περιοδικό
In: Toxins, vol. 13, no. 6, 2021, ISSN: 2072-6651.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Health, Toxicology, Toxicology and Mutagenesis
@article{Zervou2021,
title = {Cyanobacterial Toxins and Peptides in Lake Vegoritis, Greece},
author = {Sevasti-Kiriaki Zervou and Kimon Moschandreou and Aikaterina Paraskevopoulou and Christophoros Christophoridis and Elpida Grigoriadou and Triantafyllos Kaloudis and Theodoros M. Triantis and Vasiliki Tsiaoussi and Anastasia Hiskia},
doi = {10.3390/toxins13060394},
issn = {2072-6651},
year = {2021},
date = {2021-06-01},
journal = {Toxins},
volume = {13},
number = {6},
publisher = {MDPI AG},
abstract = {Cyanotoxins (CTs) produced by cyanobacteria in surface freshwater are a major threat for public health and aquatic ecosystems. Cyanobacteria can also produce a wide variety of other understudied bioactive metabolites such as oligopeptides microginins (MGs), aeruginosins (AERs), aeruginosamides (AEGs) and anabaenopeptins (APs). This study reports on the co-occurrence of CTs and cyanopeptides (CPs) in Lake Vegoritis, Greece and presents their variant-specific profiles obtained during 3-years of monitoring (2018–2020). Fifteen CTs (cylindrospermopsin (CYN), anatoxin (ATX), nodularin (NOD), and 12 microcystins (MCs)) and ten CPs (3 APs, 4 MGs, 2 AERs and aeruginosamide (AEG A)) were targeted using an extended and validated LC-MS/MS protocol for the simultaneous determination of multi-class CTs and CPs. Results showed the presence of MCs (MC-LR, MC-RR, MC-YR, dmMC-LR, dmMC-RR, MC-HtyR, and MC-HilR) and CYN at concentrations of <1 μg/L, with MC-LR (79%) and CYN (71%) being the most frequently occurring. Anabaenopeptins B (AP B) and F (AP F) were detected in almost all samples and microginin T1 (MG T1) was the most abundant CP, reaching 47.0 μg/L. This is the first report of the co-occurrence of CTs and CPs in Lake Vegoritis, which is used for irrigation, fishing and recreational activities. The findings support the need for further investigations of the occurrence of CTs and the less studied cyanobacterial metabolites in lakes, to promote risk assessment with relevance to human exposure.},
keywords = {Health, Toxicology, Toxicology and Mutagenesis},
pubstate = {published},
tppubtype = {article}
}
Cyanotoxins (CTs) produced by cyanobacteria in surface freshwater are a major threat for public health and aquatic ecosystems. Cyanobacteria can also produce a wide variety of other understudied bioactive metabolites such as oligopeptides microginins (MGs), aeruginosins (AERs), aeruginosamides (AEGs) and anabaenopeptins (APs). This study reports on the co-occurrence of CTs and cyanopeptides (CPs) in Lake Vegoritis, Greece and presents their variant-specific profiles obtained during 3-years of monitoring (2018–2020). Fifteen CTs (cylindrospermopsin (CYN), anatoxin (ATX), nodularin (NOD), and 12 microcystins (MCs)) and ten CPs (3 APs, 4 MGs, 2 AERs and aeruginosamide (AEG A)) were targeted using an extended and validated LC-MS/MS protocol for the simultaneous determination of multi-class CTs and CPs. Results showed the presence of MCs (MC-LR, MC-RR, MC-YR, dmMC-LR, dmMC-RR, MC-HtyR, and MC-HilR) and CYN at concentrations of <1 μg/L, with MC-LR (79%) and CYN (71%) being the most frequently occurring. Anabaenopeptins B (AP B) and F (AP F) were detected in almost all samples and microginin T1 (MG T1) was the most abundant CP, reaching 47.0 μg/L. This is the first report of the co-occurrence of CTs and CPs in Lake Vegoritis, which is used for irrigation, fishing and recreational activities. The findings support the need for further investigations of the occurrence of CTs and the less studied cyanobacterial metabolites in lakes, to promote risk assessment with relevance to human exposure.
Kagalou, Ifigenia; Ntislidou, Chrysoula; Latinopoulos, Dionissis; Kemitzoglou, Dimitra; Tsiaoussi, Vasiliki; Bobori, Dimitra
Setting the Phosphorus Boundaries for Greek Natural Shallow and Deep Lakes for Water Framework Directive Compliance Δημοσίευση σε επιστημονικό περιοδικό
In: Water, vol. 13, no. 5, 2021, ISSN: 2073-4441.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology
@article{Kagalou2021,
title = {Setting the Phosphorus Boundaries for Greek Natural Shallow and Deep Lakes for Water Framework Directive Compliance},
author = {Ifigenia Kagalou and Chrysoula Ntislidou and Dionissis Latinopoulos and Dimitra Kemitzoglou and Vasiliki Tsiaoussi and Dimitra Bobori},
doi = {10.3390/w13050739},
issn = {2073-4441},
year = {2021},
date = {2021-03-09},
journal = {Water},
volume = {13},
number = {5},
publisher = {MDPI AG},
abstract = {Eutrophication caused by nutrient enrichment is a predominant stressor leading to lake degradation and, thus, the set-up of boundaries that support good ecological status, the Water Framework Directive’s main target, is a necessity. Greece is one of the Member States that have recorded delays in complying with the coherent management goals of European legislation. A wide range of different statistical approaches has been proposed in the Best Practice Guide for determining appropriate nutrient thresholds. To determine the nutrient thresholds supporting the good status of natural Greek lakes, the phytoplankton dataset gathered from the national monitoring programme (2015–2020) was used for shallow and deep natural lakes. The regression analyses were sufficient and robust in order to derive total phosphorus thresholds that ranged from 20 to 41 μg/L in shallow and 15–32 μg/L in deep natural lake types. Nutrient boundaries that encompass the stressors these lakes are subject to, are essential in proper lake management design.},
keywords = {Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology},
pubstate = {published},
tppubtype = {article}
}
Eutrophication caused by nutrient enrichment is a predominant stressor leading to lake degradation and, thus, the set-up of boundaries that support good ecological status, the Water Framework Directive’s main target, is a necessity. Greece is one of the Member States that have recorded delays in complying with the coherent management goals of European legislation. A wide range of different statistical approaches has been proposed in the Best Practice Guide for determining appropriate nutrient thresholds. To determine the nutrient thresholds supporting the good status of natural Greek lakes, the phytoplankton dataset gathered from the national monitoring programme (2015–2020) was used for shallow and deep natural lakes. The regression analyses were sufficient and robust in order to derive total phosphorus thresholds that ranged from 20 to 41 μg/L in shallow and 15–32 μg/L in deep natural lake types. Nutrient boundaries that encompass the stressors these lakes are subject to, are essential in proper lake management design.
Doulgeris, Charalampos; Koukouli, Panagiota; Georgiou, Pantazis; Dalampakis, Paschalis; Karpouzos, Dimitrios
Assessment of Minimum Water Level in Lakes and Reservoirs Based on Their Morphological and Hydrological Features Δημοσίευση σε επιστημονικό περιοδικό
In: Hydrology, vol. 7, no. 4, 2020, ISSN: 2306-5338.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Earth-Surface Processes, Oceanography, Waste Management and Disposal, Water Science and Technology
@article{Doulgeris2020,
title = {Assessment of Minimum Water Level in Lakes and Reservoirs Based on Their Morphological and Hydrological Features},
author = {Charalampos Doulgeris and Panagiota Koukouli and Pantazis Georgiou and Paschalis Dalampakis and Dimitrios Karpouzos},
doi = {10.3390/hydrology7040083},
issn = {2306-5338},
year = {2020},
date = {2020-11-06},
journal = {Hydrology},
volume = {7},
number = {4},
publisher = {MDPI AG},
abstract = {The sustainable management of lakes and reservoirs requires the determination of their minimum environmental water level. Even though the assessment of minimum water level depends on a number of biotic and abiotic factors of the lake ecosystem, in many cases these factors are not entirely known and, furthermore, their evaluation is usually a challenging and laborious task. On the other hand, the lakes/reservoirs may comprise an important water resource to meet the requirements arising from economic activities. In this paper, the morphological and hydrological features of four lakes of northern Greece were analysed in order to assess their minimum environmental water level. The hydromorphological analysis was based on the relationship of the lake surface area and volume with water level as well as the water inflow from the lake’s hydrological catchment area, considering as the lake’s critical volume storage, the annual water volume flowing into a lake from its hydrological catchment area with a probability of exceedance 50% of a long time series of hydrological years. By combining morphological and hydrological features, the proposed methodology aimed to extend the analysis based solely on morphological features, and assess more comprehensively the minimum environmental water level in the four lakes, ensuring also the rising from the minimum level to the maximum (overflow) level for most of the hydrological years.},
keywords = {Earth-Surface Processes, Oceanography, Waste Management and Disposal, Water Science and Technology},
pubstate = {published},
tppubtype = {article}
}
The sustainable management of lakes and reservoirs requires the determination of their minimum environmental water level. Even though the assessment of minimum water level depends on a number of biotic and abiotic factors of the lake ecosystem, in many cases these factors are not entirely known and, furthermore, their evaluation is usually a challenging and laborious task. On the other hand, the lakes/reservoirs may comprise an important water resource to meet the requirements arising from economic activities. In this paper, the morphological and hydrological features of four lakes of northern Greece were analysed in order to assess their minimum environmental water level. The hydromorphological analysis was based on the relationship of the lake surface area and volume with water level as well as the water inflow from the lake’s hydrological catchment area, considering as the lake’s critical volume storage, the annual water volume flowing into a lake from its hydrological catchment area with a probability of exceedance 50% of a long time series of hydrological years. By combining morphological and hydrological features, the proposed methodology aimed to extend the analysis based solely on morphological features, and assess more comprehensively the minimum environmental water level in the four lakes, ensuring also the rising from the minimum level to the maximum (overflow) level for most of the hydrological years.
Petriki, Olga; Zervas, Dimitrios; Doulgeris, Charalampos; Bobori, Dimitra
Assessing the Ecological Water Level: The Case of Four Mediterranean Lakes Δημοσίευση σε επιστημονικό περιοδικό
In: Water, vol. 12, no. 11, 2020, ISSN: 2073-4441.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology
@article{Petriki2020,
title = {Assessing the Ecological Water Level: The Case of Four Mediterranean Lakes},
author = {Olga Petriki and Dimitrios Zervas and Charalampos Doulgeris and Dimitra Bobori},
doi = {10.3390/w12112977},
issn = {2073-4441},
year = {2020},
date = {2020-10-23},
journal = {Water},
volume = {12},
number = {11},
publisher = {MDPI AG},
abstract = {The ecological water regime in lake water bodies refers to the water levels that enable the fulfillment of the ecosystem’s multiple functions. Therefore, assessing the ecological water regime necessitates the consideration of hydrological, economic, social, and ecological factors. The present research is focused on the assessment of the ecological water level of four Mediterranean natural lake ecosystems, considering their morphological and biological features. Initially, suggestions on the ecological water regime of the studied lakes were made based on an analysis of the lakes’ morphometry. Further, the ecological and biological requirements of the present fish fauna and aquatic macrophytic vegetation were considered. For the latter, mapping was conducted by extensive sampling according to international standards, in order to assess macrophyte composition, abundance, and chorology, as well as species sensitivity to water level fluctuations. The above guided the proposals on the optimal water level regime that should be met by each lake regarding the macrophytic and fish communities’ sustainability, also taking into account the unique hydromorphological features of each lake. The differences in the outcoming results revealed that hydromorphological and biological approaches should be combined for assessing lakes’ ecological water regimes.},
keywords = {Aquatic Science, Biochemistry, Geography, Planning and Development, Water Science and Technology},
pubstate = {published},
tppubtype = {article}
}
The ecological water regime in lake water bodies refers to the water levels that enable the fulfillment of the ecosystem’s multiple functions. Therefore, assessing the ecological water regime necessitates the consideration of hydrological, economic, social, and ecological factors. The present research is focused on the assessment of the ecological water level of four Mediterranean natural lake ecosystems, considering their morphological and biological features. Initially, suggestions on the ecological water regime of the studied lakes were made based on an analysis of the lakes’ morphometry. Further, the ecological and biological requirements of the present fish fauna and aquatic macrophytic vegetation were considered. For the latter, mapping was conducted by extensive sampling according to international standards, in order to assess macrophyte composition, abundance, and chorology, as well as species sensitivity to water level fluctuations. The above guided the proposals on the optimal water level regime that should be met by each lake regarding the macrophytic and fish communities’ sustainability, also taking into account the unique hydromorphological features of each lake. The differences in the outcoming results revealed that hydromorphological and biological approaches should be combined for assessing lakes’ ecological water regimes.
Markogianni, Vassiliki; Kalivas, Dionissios; Petropoulos, George P.; Dimitriou, Elias
Estimating Chlorophyll-a of Inland Water Bodies in Greece Based on Landsat Data Δημοσίευση σε επιστημονικό περιοδικό
In: Remote Sensing, vol. 12, no. 13, 2020, ISSN: 2072-4292.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: General Earth and Planetary Sciences
@article{Markogianni2020,
title = {Estimating Chlorophyll-a of Inland Water Bodies in Greece Based on Landsat Data},
author = {Vassiliki Markogianni and Dionissios Kalivas and George P. Petropoulos and Elias Dimitriou},
doi = {10.3390/rs12132087},
issn = {2072-4292},
year = {2020},
date = {2020-06-29},
journal = {Remote Sensing},
volume = {12},
number = {13},
publisher = {MDPI AG},
abstract = {Assessing chlorophyll-a (Chl-a) pigments in complex inland water systems is of key importance as this parameter constitutes a major ecosystem integrity indicator. In this study, a methodological framework is proposed for quantifying Chl-a pigments using Earth observation (EO) data from Landsat 7 Enhanced Thematic Mapper Plus (ETM+) and 8 Operational Land Imager (OLI) sensors. The first step of the methodology involves the implementation of stepwise multiple regression (MLR) analysis of the available Chl-a dataset. Then, principal component analysis (PCA) is performed to explore Greek lakes’ potential interrelationships based on their Chl-a values in conjunction with certain criteria: their characteristics (artificial/natural), typology, and climatic type. Additionally, parameters such as seasonal water sampling and the date difference between sampling and satellite overpass are taken into consideration. Next, is implemented a stepwise multiple regression analysis among different groups of cases, formed by the criteria indicated from the PCA itself. This effort aimed at exploring different remote sensing-derived Chl-a algorithms for various types of lakes. The practical use of the proposed approach was evaluated in a total of 50 lake water bodies (natural and artificial) from 2013–2018, constituting the National Lake Network Monitoring of Greece in the context of the Water Framework Directive (WFD). All in all, the results evidenced the suitability of Landsat data when used with the proposed technique to estimate log-transformed Chl-a. The proposed scheme resulted in the development of models separately for natural (R = 0.78; RMSE = 1.3 μg/L) and artificial lakes (R = 0.76; RMSE = 1.29 μg/L), while the model developed without criteria proved weaker (R = 0.65; RMSE = 1.85 μg/L) in comparison to the other ones examined. The methodological framework proposed herein can be used as a useful resource toward a continuous monitoring and assessment of lake water quality, supporting sustainable water resources management.},
keywords = {General Earth and Planetary Sciences},
pubstate = {published},
tppubtype = {article}
}
Assessing chlorophyll-a (Chl-a) pigments in complex inland water systems is of key importance as this parameter constitutes a major ecosystem integrity indicator. In this study, a methodological framework is proposed for quantifying Chl-a pigments using Earth observation (EO) data from Landsat 7 Enhanced Thematic Mapper Plus (ETM+) and 8 Operational Land Imager (OLI) sensors. The first step of the methodology involves the implementation of stepwise multiple regression (MLR) analysis of the available Chl-a dataset. Then, principal component analysis (PCA) is performed to explore Greek lakes’ potential interrelationships based on their Chl-a values in conjunction with certain criteria: their characteristics (artificial/natural), typology, and climatic type. Additionally, parameters such as seasonal water sampling and the date difference between sampling and satellite overpass are taken into consideration. Next, is implemented a stepwise multiple regression analysis among different groups of cases, formed by the criteria indicated from the PCA itself. This effort aimed at exploring different remote sensing-derived Chl-a algorithms for various types of lakes. The practical use of the proposed approach was evaluated in a total of 50 lake water bodies (natural and artificial) from 2013–2018, constituting the National Lake Network Monitoring of Greece in the context of the Water Framework Directive (WFD). All in all, the results evidenced the suitability of Landsat data when used with the proposed technique to estimate log-transformed Chl-a. The proposed scheme resulted in the development of models separately for natural (R = 0.78; RMSE = 1.3 μg/L) and artificial lakes (R = 0.76; RMSE = 1.29 μg/L), while the model developed without criteria proved weaker (R = 0.65; RMSE = 1.85 μg/L) in comparison to the other ones examined. The methodological framework proposed herein can be used as a useful resource toward a continuous monitoring and assessment of lake water quality, supporting sustainable water resources management.
Zervas, Dimitrios; Tsiripidis, Ioannis; Bergmeier, Erwin; Tsiaoussi, Vasiliki
A phytosociological survey of aquatic vegetation in the main freshwater lakes of Greece Δημοσίευση σε επιστημονικό περιοδικό
In: VCS, vol. 1, pp. 53–75, 2020, ISSN: 2683-0671.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες:
@article{Zervas2020,
title = {A phytosociological survey of aquatic vegetation in the main freshwater lakes of Greece},
author = {Dimitrios Zervas and Ioannis Tsiripidis and Erwin Bergmeier and Vasiliki Tsiaoussi},
doi = {10.3897/vcs/2020/48377},
issn = {2683-0671},
year = {2020},
date = {2020-05-04},
urldate = {2020-05-04},
journal = {VCS},
volume = {1},
pages = {53--75},
publisher = {Pensoft Publishers},
abstract = {Aims: This study aims to contribute to the knowledge of European freshwater lake ecosystems with updated and new information on aquatic plant communities, by conducting national-scale phytosociological research of freshwater lake vegetation in Greece. Moreover, it investigates the relationship between aquatic plant communities and lake environmental parameters, including eutrophication levels and hydro-morphological conditions. Study area: Lakes in Greece, SE Europe. Methods: 5,690 phytosociological relevés of aquatic vegetation were sampled in 18 freshwater lake ecosystems during 2013–2016. The relevés were subjected to hierarchical cluster and indicator species analyses in order to identify associations and communities of aquatic vegetation, as well as to describe their syntaxonomy. Multiple regression analysis was applied to investigate the relationship between vegetation syntaxa and environmental parameters of lakes, i.e. physico-chemical parameters and water level fluctuation. Results: Ninety-nine plant taxa belonging to 30 different families were recorded. Forty-six vegetation types were identified and described by their ecological characteristics, diagnostic taxa and syntaxonomical status. Thirteen vegetation types, the largest number belonging to the vegetation class Charetea, are considered to be new records for Greece. The distribution of the vegetation types recorded in the 18 freshwater lakes was found to depend on environmental parameters and levels of eutrophication. Conclusions: An updated aquatic vegetation inventory was produced for Greek lakes, and primary results showed that the presence/absence of aquatic plant communities and the community composition in freshwater lakes can be utilized to assess the pressure of eutrophication on lake ecosystems. Taxonomic reference: Euro+Med (2006–). Abbreviations: MNT = Mean number of taxa; WFD = Water Framework Directive.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Aims: This study aims to contribute to the knowledge of European freshwater lake ecosystems with updated and new information on aquatic plant communities, by conducting national-scale phytosociological research of freshwater lake vegetation in Greece. Moreover, it investigates the relationship between aquatic plant communities and lake environmental parameters, including eutrophication levels and hydro-morphological conditions. Study area: Lakes in Greece, SE Europe. Methods: 5,690 phytosociological relevés of aquatic vegetation were sampled in 18 freshwater lake ecosystems during 2013–2016. The relevés were subjected to hierarchical cluster and indicator species analyses in order to identify associations and communities of aquatic vegetation, as well as to describe their syntaxonomy. Multiple regression analysis was applied to investigate the relationship between vegetation syntaxa and environmental parameters of lakes, i.e. physico-chemical parameters and water level fluctuation. Results: Ninety-nine plant taxa belonging to 30 different families were recorded. Forty-six vegetation types were identified and described by their ecological characteristics, diagnostic taxa and syntaxonomical status. Thirteen vegetation types, the largest number belonging to the vegetation class Charetea, are considered to be new records for Greece. The distribution of the vegetation types recorded in the 18 freshwater lakes was found to depend on environmental parameters and levels of eutrophication. Conclusions: An updated aquatic vegetation inventory was produced for Greek lakes, and primary results showed that the presence/absence of aquatic plant communities and the community composition in freshwater lakes can be utilized to assess the pressure of eutrophication on lake ecosystems. Taxonomic reference: Euro+Med (2006–). Abbreviations: MNT = Mean number of taxa; WFD = Water Framework Directive.
Zervas, Dimitrios; Tsiaoussi, Vasiliki; Kallimanis, Athanasios S.; Dimopoulos, Panayotis; Tsiripidis, Ioannis
Exploring the relationships between aquatic macrophyte functional traits and anthropogenic pressures in freshwater lakes Δημοσίευση σε επιστημονικό περιοδικό
In: Acta Oecologica, vol. 99, 2019, ISSN: 1146-609X.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Behavior and Systematics, Ecology, Evolution, Nature and Landscape Conservation
@article{Zervas2019,
title = {Exploring the relationships between aquatic macrophyte functional traits and anthropogenic pressures in freshwater lakes},
author = {Dimitrios Zervas and Vasiliki Tsiaoussi and Athanasios S. Kallimanis and Panayotis Dimopoulos and Ioannis Tsiripidis},
doi = {10.1016/j.actao.2019.103443},
issn = {1146-609X},
year = {2019},
date = {2019-06-27},
journal = {Acta Oecologica},
volume = {99},
publisher = {Elsevier BV},
abstract = {Modern water resource management requires biomonitoring of the structure and functioning of freshwater ecosystems, which may be better illuminated by functional trait distribution patterns and responses across human-induced pressure gradients. In this study, we applied the RLQ, the fourth-corner and their novel combination methods, in order to assess the relationship between the distribution of 30 aquatic macrophyte functional traits and 14 indicators of anthropogenic pressures across 16 freshwater lakes. Our findings showed that there is a statistically significant relationship between the distribution of specific functional traits and anthropogenic pressures. Eutrophication was the dominant pressure and the shift from a submerged-macrophyte dominated vegetation community to an emergent one was the most important functional response. Aerial reproduction and dispersal traits were found to replace water-related ones under higher nutrient concentrations. Trophic and light preferences of macrophytic species increased, while their leaf morphology was found to change from tubular/capillary leaf types with low leaf area values to entire leaf types with greater leaf area. These results provide hints on the changes in ecosystem functioning occurring as a response to human-induced drivers. Therefore, this assessment approach could provide important support to the tasks of biomonitoring, conservation and management planning in freshwater ecosystems.},
keywords = {Behavior and Systematics, Ecology, Evolution, Nature and Landscape Conservation},
pubstate = {published},
tppubtype = {article}
}
Modern water resource management requires biomonitoring of the structure and functioning of freshwater ecosystems, which may be better illuminated by functional trait distribution patterns and responses across human-induced pressure gradients. In this study, we applied the RLQ, the fourth-corner and their novel combination methods, in order to assess the relationship between the distribution of 30 aquatic macrophyte functional traits and 14 indicators of anthropogenic pressures across 16 freshwater lakes. Our findings showed that there is a statistically significant relationship between the distribution of specific functional traits and anthropogenic pressures. Eutrophication was the dominant pressure and the shift from a submerged-macrophyte dominated vegetation community to an emergent one was the most important functional response. Aerial reproduction and dispersal traits were found to replace water-related ones under higher nutrient concentrations. Trophic and light preferences of macrophytic species increased, while their leaf morphology was found to change from tubular/capillary leaf types with low leaf area values to entire leaf types with greater leaf area. These results provide hints on the changes in ecosystem functioning occurring as a response to human-induced drivers. Therefore, this assessment approach could provide important support to the tasks of biomonitoring, conservation and management planning in freshwater ecosystems.
Mavromati, Efpraxia; Kagalou, Ifigenia; Kemitzoglou, Dimitra; Apostolakis, Antonis; Seferlis, Miltiadis; Tsiaoussi, Vasiliki
Relationships Among Land Use Patterns, Hydromorphological Features and Physicochemical Parameters of Surface Waters: WFD Lake Monitoring in Greece Δημοσίευση σε επιστημονικό περιοδικό
In: Environ. Process., vol. 5, no. S1, pp. 139–151, 2018, ISSN: 2198-7505.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Environmental Engineering, Health, Management, Monitoring, Policy and Law, Pollution, Toxicology and Mutagenesis, Water Science and Technology
@article{Mavromati2018,
title = {Relationships Among Land Use Patterns, Hydromorphological Features and Physicochemical Parameters of Surface Waters: WFD Lake Monitoring in Greece},
author = {Efpraxia Mavromati and Ifigenia Kagalou and Dimitra Kemitzoglou and Antonis Apostolakis and Miltiadis Seferlis and Vasiliki Tsiaoussi},
doi = {10.1007/s40710-018-0315-6},
issn = {2198-7505},
year = {2018},
date = {2018-06-22},
journal = {Environ. Process.},
volume = {5},
number = {S1},
pages = {139--151},
publisher = {Springer Science and Business Media LLC},
abstract = {The national monitoring network of waters in Greece, in the context of Water Framework Directive (WFD), comprises 50 lake water bodies, both natural and artificial. The aims of the study are: (i) to present the pressures resulting from land cover and population density at river basin level; and (ii) to link catchment area features with physicochemical results from the first period of WFD monitoring. Land cover, population data in the catchment and physicochemical parameters were the main variables used in order to assess the lakes of the Greek WFD monitoring network. Intensive agriculture and urbanization, described as population density, proved to be the main pressure of severe impacted lakes as they were both highly associated with total phosphorus. Principal Components Analysis was used to position the Greek lakes along physical and chemical attributes, such as secchi depth, total phosphorus and ion concentrations and separate them according to their water quality. Clear reservoirs and natural lakes with high secchi depth were separated from more impacted ones with low secchi depth revealing a gradient of eutrophication, the most crucial anthropogenic pressure in Greece and in the Mediterranean area. The sustainable management of Greek lakes requires mitigation measures at a catchment scale, in order to regulate land uses, as well as site specific measures when needed.},
keywords = {Environmental Engineering, Health, Management, Monitoring, Policy and Law, Pollution, Toxicology and Mutagenesis, Water Science and Technology},
pubstate = {published},
tppubtype = {article}
}
The national monitoring network of waters in Greece, in the context of Water Framework Directive (WFD), comprises 50 lake water bodies, both natural and artificial. The aims of the study are: (i) to present the pressures resulting from land cover and population density at river basin level; and (ii) to link catchment area features with physicochemical results from the first period of WFD monitoring. Land cover, population data in the catchment and physicochemical parameters were the main variables used in order to assess the lakes of the Greek WFD monitoring network. Intensive agriculture and urbanization, described as population density, proved to be the main pressure of severe impacted lakes as they were both highly associated with total phosphorus. Principal Components Analysis was used to position the Greek lakes along physical and chemical attributes, such as secchi depth, total phosphorus and ion concentrations and separate them according to their water quality. Clear reservoirs and natural lakes with high secchi depth were separated from more impacted ones with low secchi depth revealing a gradient of eutrophication, the most crucial anthropogenic pressure in Greece and in the Mediterranean area. The sustainable management of Greek lakes requires mitigation measures at a catchment scale, in order to regulate land uses, as well as site specific measures when needed.
Ntislidou, Chrysoula; Lazaridou, Maria; Tsiaoussi, Vasiliki; Bobori, Dimitra
A new multimetric macroinvertebrate index for the ecological assessment of Mediterranean lakes Δημοσίευση σε επιστημονικό περιοδικό
In: Ecological Indicators, vol. 93, pp. 1020–1033, 2018, ISSN: 1470-160X.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Behavior and Systematics, Ecology, Evolution, General Decision Sciences
@article{Ntislidou2018,
title = {A new multimetric macroinvertebrate index for the ecological assessment of Mediterranean lakes},
author = {Chrysoula Ntislidou and Maria Lazaridou and Vasiliki Tsiaoussi and Dimitra Bobori},
doi = {10.1016/j.ecolind.2018.05.071},
issn = {1470-160X},
year = {2018},
date = {2018-06-20},
journal = {Ecological Indicators},
volume = {93},
pages = {1020--1033},
publisher = {Elsevier BV},
abstract = {This study outlines the development and application of a new multimetric index (Greek Lake Benthic macroinvertebrate Index – GLBiI) for the assessment of the ecological quality of Greek lakes, based on the ecological quality ratio (EQR), under the requirements of the Water Framework Directive. Profundal and sublittoral benthic macroinvertebrates from 18 lakes were biannually sampled across Greece. Additionally, 21 environmental parameters and 5 human pressures were assessed for each lake. The hindcasting approach was used for the establishment of reference conditions after minimizing human pressures. A pool of 84 candidate metrics, representing diversity/richness, sensitivity, functional traits, and taxonomical composition, were tested for the development of the multimetric index. Spearman’s rank correlation extracted seven environmental parameters (lake area, mean depth, altitude, alkalinity, dissolved oxygen at bottom and conductivity at bottom) and three human pressures (total phosphorus, population density and non-natural land cover) that were further stepwise linear regressed against each biological metric for pressure-response relationships. Finally, three metrics, the number of taxa and the Simpson's diversity index in the profundal and sublittoral zones, and the relative contribution of Chironomidae (%) family in the profundal zone, were selected as the most appropriate, responding to eutrophication (expressed as total phosphorus and non-natural land cover). The multimetric index GLBiI was expressed as the mean of the EQRs of its metrics following a five class ecological status system. This assessment method may be used in other Mediterranean lakes with similar characteristics.},
keywords = {Behavior and Systematics, Ecology, Evolution, General Decision Sciences},
pubstate = {published},
tppubtype = {article}
}
This study outlines the development and application of a new multimetric index (Greek Lake Benthic macroinvertebrate Index – GLBiI) for the assessment of the ecological quality of Greek lakes, based on the ecological quality ratio (EQR), under the requirements of the Water Framework Directive. Profundal and sublittoral benthic macroinvertebrates from 18 lakes were biannually sampled across Greece. Additionally, 21 environmental parameters and 5 human pressures were assessed for each lake. The hindcasting approach was used for the establishment of reference conditions after minimizing human pressures. A pool of 84 candidate metrics, representing diversity/richness, sensitivity, functional traits, and taxonomical composition, were tested for the development of the multimetric index. Spearman’s rank correlation extracted seven environmental parameters (lake area, mean depth, altitude, alkalinity, dissolved oxygen at bottom and conductivity at bottom) and three human pressures (total phosphorus, population density and non-natural land cover) that were further stepwise linear regressed against each biological metric for pressure-response relationships. Finally, three metrics, the number of taxa and the Simpson's diversity index in the profundal and sublittoral zones, and the relative contribution of Chironomidae (%) family in the profundal zone, were selected as the most appropriate, responding to eutrophication (expressed as total phosphorus and non-natural land cover). The multimetric index GLBiI was expressed as the mean of the EQRs of its metrics following a five class ecological status system. This assessment method may be used in other Mediterranean lakes with similar characteristics.
Zervas, Dimitrios; Tsiaoussi, Vasiliki; Tsiripidis, Ioannis
HeLM: a macrophyte-based method for monitoring and assessment of Greek lakes Δημοσίευση σε επιστημονικό περιοδικό
In: Environ Monit Assess, vol. 190, no. 6, 2018, ISSN: 1573-2959.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: General Environmental Science, General Medicine, Management, Monitoring, Policy and Law, Pollution
@article{Zervas2018,
title = {HeLM: a macrophyte-based method for monitoring and assessment of Greek lakes},
author = {Dimitrios Zervas and Vasiliki Tsiaoussi and Ioannis Tsiripidis},
doi = {10.1007/s10661-018-6708-1},
issn = {1573-2959},
year = {2018},
date = {2018-01-05},
journal = {Environ Monit Assess},
volume = {190},
number = {6},
publisher = {Springer Science and Business Media LLC},
abstract = {The Water Framework Directive (WFD) requires Member States to develop appropriate assessment methods for the classification of the ecological status of their surface waters. Mediterranean region has lagged behind in this task, so we propose here the first developed method for Greek lakes, Hellenic Lake Macrophyte (HeLM) assessment method. This method is based on two metrics, a modified trophic index and maximum colonization depth Cmax that quantify the degree of changes in lake macrophytic vegetation, as a response to eutrophication and general degradation pressures. The method was developed on the basis of a data set sampled from 272 monitoring transects in 16 Greek lakes. Sites from three lakes were selected as potential reference sites by using a screening process. Ecological quality ratios were calculated for each metric and for each lake, and ecological status class boundaries were defined. For the evaluation of effectiveness of the method, the correlations between individual metrics and final HeLM values and common pressure indicators, such as total phosphorus, chlorophyll a and Secchi depth, were tested and found highly significant and relatively strong. In addition, the ability of HeLM values and its individual metrics to distinguish between different macrophytic communities’ structure was checked using aquatic plant life-forms and found satisfactory. The HeLM method gave a reliable assessment of the macrophytic vegetation’s condition in Greek lakes and may constitute a useful tool for the classification of ecological status of other Mediterranean lakes.},
keywords = {General Environmental Science, General Medicine, Management, Monitoring, Policy and Law, Pollution},
pubstate = {published},
tppubtype = {article}
}
The Water Framework Directive (WFD) requires Member States to develop appropriate assessment methods for the classification of the ecological status of their surface waters. Mediterranean region has lagged behind in this task, so we propose here the first developed method for Greek lakes, Hellenic Lake Macrophyte (HeLM) assessment method. This method is based on two metrics, a modified trophic index and maximum colonization depth Cmax that quantify the degree of changes in lake macrophytic vegetation, as a response to eutrophication and general degradation pressures. The method was developed on the basis of a data set sampled from 272 monitoring transects in 16 Greek lakes. Sites from three lakes were selected as potential reference sites by using a screening process. Ecological quality ratios were calculated for each metric and for each lake, and ecological status class boundaries were defined. For the evaluation of effectiveness of the method, the correlations between individual metrics and final HeLM values and common pressure indicators, such as total phosphorus, chlorophyll a and Secchi depth, were tested and found highly significant and relatively strong. In addition, the ability of HeLM values and its individual metrics to distinguish between different macrophytic communities’ structure was checked using aquatic plant life-forms and found satisfactory. The HeLM method gave a reliable assessment of the macrophytic vegetation’s condition in Greek lakes and may constitute a useful tool for the classification of ecological status of other Mediterranean lakes.
Petriki, Olga; Lazaridou, Maria; Bobori, Dimitra
A fish-based index for the assessment of the ecological quality of temperate lakes Δημοσίευση σε επιστημονικό περιοδικό
In: Ecological Indicators, vol. 78, pp. 556–565, 2017, ISSN: 1470-160X.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Behavior and Systematics, Ecology, Evolution, General Decision Sciences
@article{Petriki2017,
title = {A fish-based index for the assessment of the ecological quality of temperate lakes},
author = {Olga Petriki and Maria Lazaridou and Dimitra Bobori},
doi = {10.1016/j.ecolind.2017.03.029},
issn = {1470-160X},
year = {2017},
date = {2017-04-08},
journal = {Ecological Indicators},
volume = {78},
pages = {556--565},
publisher = {Elsevier BV},
abstract = {A fish – based index for the assessment of the ecological quality of natural temperate lakes was developed, in accordance to the requirements of the Water Framework Directive (WFD) 2000/60/EC. As a case study, 11 natural lakes located at northern and western Greece were selected. Fish surveys were conducted during mid summer to mid autumn in 2010, 2011 and 2012 using Nordic gillnets and electrofishing. Environmental parameters and anthropogenic pressures were assessed for each lake. Fish species richness, abundance, trophic, reproductive and habitat functional guilds were used for extracting a set of 107 metrics, meeting the requirements of the WFD. All metrics were initially tested as candidates for the index development. A stepwise linear regression of each metric against environmental parameters (lake area, altitude, maximum depth, alkalinity) and anthropogenic pressures (drainage area covered by non-natural land uses – NNLC, water total phosphorus concentrations – TP, Lake Habitat Modification Score – LHMS) was initially conducted for ensuring pressure-response relationships. Reference conditions for each lake were estimated by the hindcasting procedure and the ecological quality for each lake was expressed as the ecological quality ratio (EQR) by a value ranging from 0 (poor quality) to 1 (excellent quality). Two fish fauna metrics, the relative numerical abundance of introduced species (Introduceda) and the relative biomass of omnivorous species (OMNIb) were finally extracted as the most significant, responding to LHMS and TP, respectively. The final index was expressed as the mean values of the EQRs of these two metrics. The multimetric fish index presented herein could serve as a tool for assessing the ecological quality of natural lakes at broad geographical scale and generally, in the Mediterranean temperate lakes with similar hydromorphological characteristics.},
keywords = {Behavior and Systematics, Ecology, Evolution, General Decision Sciences},
pubstate = {published},
tppubtype = {article}
}
A fish – based index for the assessment of the ecological quality of natural temperate lakes was developed, in accordance to the requirements of the Water Framework Directive (WFD) 2000/60/EC. As a case study, 11 natural lakes located at northern and western Greece were selected. Fish surveys were conducted during mid summer to mid autumn in 2010, 2011 and 2012 using Nordic gillnets and electrofishing. Environmental parameters and anthropogenic pressures were assessed for each lake. Fish species richness, abundance, trophic, reproductive and habitat functional guilds were used for extracting a set of 107 metrics, meeting the requirements of the WFD. All metrics were initially tested as candidates for the index development. A stepwise linear regression of each metric against environmental parameters (lake area, altitude, maximum depth, alkalinity) and anthropogenic pressures (drainage area covered by non-natural land uses – NNLC, water total phosphorus concentrations – TP, Lake Habitat Modification Score – LHMS) was initially conducted for ensuring pressure-response relationships. Reference conditions for each lake were estimated by the hindcasting procedure and the ecological quality for each lake was expressed as the ecological quality ratio (EQR) by a value ranging from 0 (poor quality) to 1 (excellent quality). Two fish fauna metrics, the relative numerical abundance of introduced species (Introduceda) and the relative biomass of omnivorous species (OMNIb) were finally extracted as the most significant, responding to LHMS and TP, respectively. The final index was expressed as the mean values of the EQRs of these two metrics. The multimetric fish index presented herein could serve as a tool for assessing the ecological quality of natural lakes at broad geographical scale and generally, in the Mediterranean temperate lakes with similar hydromorphological characteristics.
Αναρτημένες ανακοινώσεις σε συνέδρια
Γιουρίεβα, Β.; Μαυρομάτη, Ε.; Τσιαούση, Β.
Μελέτη των Characeae σε δύο ολιγότροφες λίμνες: αποτελέσματα του Εθνικού Δικτύου Παρακολούθησης λιμνών Αναρτημένη ανακοίνωση σε συνέδριο
Αναρτημένη ανακοίνωση στο 12ο Συνέδριο Ελληνικής Οικολογικής Εταιρείας, Αθήνα, 1-4 Οκτωβρίου 2025, 2025.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Characeae, Λίμνες, Μακρόφυτα
@conference{nokey,
title = {Μελέτη των Characeae σε δύο ολιγότροφες λίμνες: αποτελέσματα του Εθνικού Δικτύου Παρακολούθησης λιμνών},
author = {Β. Γιουρίεβα and Ε. Μαυρομάτη and Β. Τσιαούση},
url = {http://hdl.handle.net/11340/2139},
year = {2025},
date = {2025-10-01},
urldate = {2025-10-01},
booktitle = {Αναρτημένη ανακοίνωση στο 12ο Συνέδριο Ελληνικής Οικολογικής Εταιρείας, Αθήνα, 1-4 Οκτωβρίου 2025},
abstract = {Τα χαρόφυτα (οικογένεια Characeae) συνιστούν μια ομάδα μακροσκοπικών, βενθικών φυκών των εσωτερικών υδάτων1. Απαντούν κυρίως σε ολιγότροφα υδάτινα οικοσυστήματα, όπου σχηματίζουν εκτεταμένες φυτοκοινωνίες. Συνιστούν βιοδείκτη καλής οικολογικής κατάστασης των λιμνών2. Στην παρούσα εργασία παρουσιάζονται τα αποτελέσματα της παρακολούθησης των χαροφύτων σε δύο ολιγότροφες λίμνες, την Λίμνη Κουρνά και την Τεχνητή Λίμνη Φενεού και διερευνώνται οι χρονικές μεταβολές της ταξινομικής τους σύνθεσης και αφθονίας καθώς και η συσχέτισή τους με φυσικοχημικές παραμέτρους. Οι δειγματοληψίες των υδρόβιων μακροφύτων (belt transect method) πραγματοποιήθηκαν τέσσερις φορές σε κάθε λίμνη στο χρονικό διάστημα 2014-2024, κατά τη βλαστητική περίοδο. Συνολικά, καταγράφηκαν εννέα taxa χαροφύτων στις δύο λίμνες. Στην Κουρνά καταγράφηκαν τέσσερα taxa χαροφύτων με το Chara corfuensis να εμφανίζει τη μεγαλύτερη σχετική κάλυψη (το 2020 με 21.48%). Στον Φενεό, καταγράφηκαν επτά taxa, με το Chara globularis να έχει τη μεγαλύτερη σχετική κάλυψη (το 2017 με 43.19%). Η μέγιστη σχετική κάλυψη χαροφύτων καταγράφηκε στην Κουρνά το 2020 και στον Φενεό το 2014 (38.08% και 77.80% αντιστοίχως). Το μέγιστο βάθος αποίκισης χαροφύτων καταγράφηκε στα 16 μέτρα στην Κουρνά (2020) και στα 15 μέτρα στον Φενεό (2017). Με βάση τα αποτελέσματα πολυμεταβλητής ανάλυσης πλεονασμού (RDA) φαίνεται πως οι φυσικοχημικές συνθήκες επηρεάζουν τις βιοκοινότητες των χαροφύτων. Η συστηματική παρακολούθηση των χαροφύτων αναμένεται να συμβάλει στη βελτίωση της κατανόησης των οικολογικών απαιτήσεών τους και στη διατήρηση των λιμναίων οικοσυστημάτων στα οποία εντοπίζονται.},
keywords = {Characeae, Λίμνες, Μακρόφυτα},
pubstate = {published},
tppubtype = {conference}
}
Τα χαρόφυτα (οικογένεια Characeae) συνιστούν μια ομάδα μακροσκοπικών, βενθικών φυκών των εσωτερικών υδάτων1. Απαντούν κυρίως σε ολιγότροφα υδάτινα οικοσυστήματα, όπου σχηματίζουν εκτεταμένες φυτοκοινωνίες. Συνιστούν βιοδείκτη καλής οικολογικής κατάστασης των λιμνών2. Στην παρούσα εργασία παρουσιάζονται τα αποτελέσματα της παρακολούθησης των χαροφύτων σε δύο ολιγότροφες λίμνες, την Λίμνη Κουρνά και την Τεχνητή Λίμνη Φενεού και διερευνώνται οι χρονικές μεταβολές της ταξινομικής τους σύνθεσης και αφθονίας καθώς και η συσχέτισή τους με φυσικοχημικές παραμέτρους. Οι δειγματοληψίες των υδρόβιων μακροφύτων (belt transect method) πραγματοποιήθηκαν τέσσερις φορές σε κάθε λίμνη στο χρονικό διάστημα 2014-2024, κατά τη βλαστητική περίοδο. Συνολικά, καταγράφηκαν εννέα taxa χαροφύτων στις δύο λίμνες. Στην Κουρνά καταγράφηκαν τέσσερα taxa χαροφύτων με το Chara corfuensis να εμφανίζει τη μεγαλύτερη σχετική κάλυψη (το 2020 με 21.48%). Στον Φενεό, καταγράφηκαν επτά taxa, με το Chara globularis να έχει τη μεγαλύτερη σχετική κάλυψη (το 2017 με 43.19%). Η μέγιστη σχετική κάλυψη χαροφύτων καταγράφηκε στην Κουρνά το 2020 και στον Φενεό το 2014 (38.08% και 77.80% αντιστοίχως). Το μέγιστο βάθος αποίκισης χαροφύτων καταγράφηκε στα 16 μέτρα στην Κουρνά (2020) και στα 15 μέτρα στον Φενεό (2017). Με βάση τα αποτελέσματα πολυμεταβλητής ανάλυσης πλεονασμού (RDA) φαίνεται πως οι φυσικοχημικές συνθήκες επηρεάζουν τις βιοκοινότητες των χαροφύτων. Η συστηματική παρακολούθηση των χαροφύτων αναμένεται να συμβάλει στη βελτίωση της κατανόησης των οικολογικών απαιτήσεών τους και στη διατήρηση των λιμναίων οικοσυστημάτων στα οποία εντοπίζονται.
Zachopoulos, K.; Papadimos, D.
Application of a 2D-Hydrodynamic Model to Assess the Impact of Spring Water Discharge into the Lake Pamvotida in Ioannina, Greece Αναρτημένη ανακοίνωση σε συνέδριο
p. 645-646 In: Proceedings of the 13th World Congress of EWRA on Water Resources and Environment, Palermo, Italy 24 – 28 June 2025, 2025.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Υδρομορφολογική ανάλυση
@conference{nokey,
title = {Application of a 2D-Hydrodynamic Model to Assess the Impact of Spring Water Discharge into the Lake Pamvotida in Ioannina, Greece},
author = {K. Zachopoulos and D. Papadimos},
url = {http://hdl.handle.net/11340/2146},
year = {2025},
date = {2025-06-24},
urldate = {2025-06-24},
booktitle = {p. 645-646 In: Proceedings of the 13th World Congress of EWRA on Water Resources and Environment, Palermo, Italy 24 - 28 June 2025},
pages = {645-646},
abstract = {According to the study conducted by the Greek Biotope Wetland Centre for the assessment of the minimum water level requirements of Lake Pamvotida, its water level (WL) should be maintained within the specified range of 469.10 - 468.20 m, a.m.s.l. However, the lake is very susceptible to larger reductions in its WL in late summer (below the proposed water level of 468.20 m) due to increased evaporation and over-pumping for irrigation purposes. This study investigates the introduction of freshwater from the Sentenikos and Kalithea Springs into Lake Pamvotida in order to mitigate the decrease in its water level (WL), during the dry season. A 2-D hydrodynamic modelling system was used to evaluate the effects of three scenarios in which the existence and location of the spring discharge inflow are differentiated. WL, temperature (T), dissolved oxygen (DO) and biochemical oxygen demand (BOD) were used for the evaluation of the effect of the scenarios on the lake’s condition. The research showed a significant change on the WL fluctuation of the lake, and only minor effects locally dispersed regarding on its temperature, DO and BOD.},
keywords = {Λίμνες, Υδρομορφολογική ανάλυση},
pubstate = {published},
tppubtype = {conference}
}
According to the study conducted by the Greek Biotope Wetland Centre for the assessment of the minimum water level requirements of Lake Pamvotida, its water level (WL) should be maintained within the specified range of 469.10 – 468.20 m, a.m.s.l. However, the lake is very susceptible to larger reductions in its WL in late summer (below the proposed water level of 468.20 m) due to increased evaporation and over-pumping for irrigation purposes. This study investigates the introduction of freshwater from the Sentenikos and Kalithea Springs into Lake Pamvotida in order to mitigate the decrease in its water level (WL), during the dry season. A 2-D hydrodynamic modelling system was used to evaluate the effects of three scenarios in which the existence and location of the spring discharge inflow are differentiated. WL, temperature (T), dissolved oxygen (DO) and biochemical oxygen demand (BOD) were used for the evaluation of the effect of the scenarios on the lake’s condition. The research showed a significant change on the WL fluctuation of the lake, and only minor effects locally dispersed regarding on its temperature, DO and BOD.
Ι., Ζέρβα; Κεμιτζόγλου, Δ.; Κατσαβούνη, Σ.; Νικολοπούλου, Η.; Γιουρίεβα, Β.; Ζιώγα, Μ.; Ναυροζίδου, Β.; Σεφερλής, Μ.; Σκόπα, Μ.; Τσιαούση., Β.
Έλεγχος της απόκρισης των βιολογικών κοινοτήτων σε σχέση με τις θρεπτικές ουσίες σε φυσικές λίμνες της Ελλάδας Αναρτημένη ανακοίνωση σε συνέδριο
16o Πανελλήνιο Συνέδριο Ελληνικής Υδροτεχνικής Ένωσης, Ξάνθη, 29-30 Μαίου 2025. Αναρτημένη Παρουσίαση., 2025.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Φυσικοχημική ανάλυση
@conference{nokey,
title = {Έλεγχος της απόκρισης των βιολογικών κοινοτήτων σε σχέση με τις θρεπτικές ουσίες σε φυσικές λίμνες της Ελλάδας},
author = {Ζέρβα Ι. and Δ. Κεμιτζόγλου and Σ. Κατσαβούνη and Η. Νικολοπούλου and Β. Γιουρίεβα and Μ. Ζιώγα and Β. Ναυροζίδου and Μ. Σεφερλής and Μ. Σκόπα and Β. Τσιαούση.},
url = {http://hdl.handle.net/11340/2133},
year = {2025},
date = {2025-05-29},
urldate = {2025-05-29},
booktitle = {16o Πανελλήνιο Συνέδριο Ελληνικής Υδροτεχνικής Ένωσης, Ξάνθη, 29-30 Μαίου 2025. Αναρτημένη Παρουσίαση.},
abstract = {Σύμφωνα με την Οδηγία2000/60/ΕΚ, η σύνθεση και η αφθονία των βιολογικών κοινοτήτων καθορίζουν την οικολογική κατάταξη μιας λίμνης, ενώ οι φυσικοχημικές παράμετροι, όπως ο ολικός φώσφορος, λειτουργούν υποστηρικτικά. Ο ολικός φώσφορος (TotalPhosphorus,TP) αποτελεί την πλέον προσδιοριζόμενη παράμετρο στις λίμνες και λειτουργεί ως περιοριστικό θρεπτικό-κλειδί. Για το λόγο αυτό πολλές Ευρωπαϊκές χώρες θέτουν όρια στις συγκεντρώσεις του (Kellyetal.,2022).},
keywords = {Λίμνες, Φυσικοχημική ανάλυση},
pubstate = {published},
tppubtype = {conference}
}
Σύμφωνα με την Οδηγία2000/60/ΕΚ, η σύνθεση και η αφθονία των βιολογικών κοινοτήτων καθορίζουν την οικολογική κατάταξη μιας λίμνης, ενώ οι φυσικοχημικές παράμετροι, όπως ο ολικός φώσφορος, λειτουργούν υποστηρικτικά. Ο ολικός φώσφορος (TotalPhosphorus,TP) αποτελεί την πλέον προσδιοριζόμενη παράμετρο στις λίμνες και λειτουργεί ως περιοριστικό θρεπτικό-κλειδί. Για το λόγο αυτό πολλές Ευρωπαϊκές χώρες θέτουν όρια στις συγκεντρώσεις του (Kellyetal.,2022).
Περιβολιώτη, Τ.; Ζαχόπουλος, Κ.; Αποστολάκης, Α.; Μουρατίδης, Α.
Εφαρμογή και Αξιολόγηση Μεθόδων Δορυφορικής Βαθυμετρίας (Satellite-derived Bathymetry) στη Λίμνη Τριχωνίδα με Δεδομένα Sentinel-2 Αναρτημένη ανακοίνωση σε συνέδριο
16ο Πανελλήνιο Συνέδριο Ελληνικής Υδροτεχνικής Ένωσης Ξάνθη, 29-30 Μαΐου 2025, 2025.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Βαθυμετρία, Δορυφορική τηλεπισκόπηση, Λίμνες, Τριχωνίδα
@conference{nokey,
title = {Εφαρμογή και Αξιολόγηση Μεθόδων Δορυφορικής Βαθυμετρίας (Satellite-derived Bathymetry) στη Λίμνη Τριχωνίδα με Δεδομένα Sentinel-2},
author = {Τ. Περιβολιώτη and Κ. Ζαχόπουλος and Α. Αποστολάκης and Α. Μουρατίδης},
url = {http://hdl.handle.net/11340/2134},
year = {2025},
date = {2025-05-29},
urldate = {2025-05-29},
booktitle = {16ο Πανελλήνιο Συνέδριο Ελληνικής Υδροτεχνικής Ένωσης Ξάνθη, 29-30 Μαΐου 2025},
pages = {79-80},
abstract = {Η γνώση της βαθυμετρίας μιας λίμνης, αποτελεί βασικό εργαλείο για την κατανόηση, διαχείριση και προστασία των λιμναίων οικοσυστημάτων. Η πιο αξιόπιστη μέθοδος βαθυμετρίας είναι με την χρήση ηχοβολιστικών συστημάτων (sonars) (Viaña-Borja et al., 2023). Το μειονέκτημα της μεθόδου είναι η δυσκολία εφαρμογής σε μεγάλη κλίμακα, καθώς απαιτείται χρόνος και εξειδικευμένο προσωπικό. Μια ακόμα εναλλακτική εφαρμογή για την μέτρηση βάθους είναι η δορυφορική βαθυμετρία (SDB), η οποία προσφέρει σημαντικά πλεονεκτήματα, καθώς επιτρέπει τη χαμηλού κόστους, γρήγορη, επαναλαμβανόμενη αποτύπωση μεγάλων περιοχών, ακόμα και σε μη προσβάσιμες περιοχές (Xie et al., 2023). Ο συνδυασμός δορυφορικών και επιτόπιων δεδομένων μεγιστοποιεί την αποτελεσματικότητά καθώς τα δορυφορικά παρέχουν εύρος και συχνότητα, ενώ τα δεδομένα πεδίου προσφέρουν ακρίβεια και επικύρωση. Σκοπός της παρούσας εργασίας είναι η ανάπτυξη και η αξιολόγηση τριών διαφορετικών μοντέλων δορυφορικής βαθυμετρίας, βασισμένων σε δεδομένα Sentinel-2. Συγκεκριμένα, εφαρμόζονται οι μέθοδοι των Stumpf, Lyzenga και Log-Linear Ratio Model (LRM) για την εκτίμηση του βάθους της υδάτινης στήλης. Τα αποτελέσματα των μοντέλων συγκρίνονται με Ψηφιακό Μοντέλο Εδάφους, το οποίο προέκυψε από μετρήσεις πεδίου με τη χρήση ηχοβολιστικού συστήματος. Η παρούσα εργασία στοχεύει στην ανάδειξη των δυνατοτήτων των δορυφορικών δεδομένων ως εργαλείο για την βαθυμετρική αποτύπωση των ρηχών υδάτων.},
keywords = {Βαθυμετρία, Δορυφορική τηλεπισκόπηση, Λίμνες, Τριχωνίδα},
pubstate = {published},
tppubtype = {conference}
}
Η γνώση της βαθυμετρίας μιας λίμνης, αποτελεί βασικό εργαλείο για την κατανόηση, διαχείριση και προστασία των λιμναίων οικοσυστημάτων. Η πιο αξιόπιστη μέθοδος βαθυμετρίας είναι με την χρήση ηχοβολιστικών συστημάτων (sonars) (Viaña-Borja et al., 2023). Το μειονέκτημα της μεθόδου είναι η δυσκολία εφαρμογής σε μεγάλη κλίμακα, καθώς απαιτείται χρόνος και εξειδικευμένο προσωπικό. Μια ακόμα εναλλακτική εφαρμογή για την μέτρηση βάθους είναι η δορυφορική βαθυμετρία (SDB), η οποία προσφέρει σημαντικά πλεονεκτήματα, καθώς επιτρέπει τη χαμηλού κόστους, γρήγορη, επαναλαμβανόμενη αποτύπωση μεγάλων περιοχών, ακόμα και σε μη προσβάσιμες περιοχές (Xie et al., 2023). Ο συνδυασμός δορυφορικών και επιτόπιων δεδομένων μεγιστοποιεί την αποτελεσματικότητά καθώς τα δορυφορικά παρέχουν εύρος και συχνότητα, ενώ τα δεδομένα πεδίου προσφέρουν ακρίβεια και επικύρωση. Σκοπός της παρούσας εργασίας είναι η ανάπτυξη και η αξιολόγηση τριών διαφορετικών μοντέλων δορυφορικής βαθυμετρίας, βασισμένων σε δεδομένα Sentinel-2. Συγκεκριμένα, εφαρμόζονται οι μέθοδοι των Stumpf, Lyzenga και Log-Linear Ratio Model (LRM) για την εκτίμηση του βάθους της υδάτινης στήλης. Τα αποτελέσματα των μοντέλων συγκρίνονται με Ψηφιακό Μοντέλο Εδάφους, το οποίο προέκυψε από μετρήσεις πεδίου με τη χρήση ηχοβολιστικού συστήματος. Η παρούσα εργασία στοχεύει στην ανάδειξη των δυνατοτήτων των δορυφορικών δεδομένων ως εργαλείο για την βαθυμετρική αποτύπωση των ρηχών υδάτων.
Lortou, U.; Nikolopoulou, I.; Zacharioudaki, A.; Aligizaki, K.; Moschandreou, K.; Tsiaoussi, V.
Cyanobacteria community status of two natural lakes (Pamvotida, Zazari) in Greece Αναρτημένη ανακοίνωση σε συνέδριο
13th International Conference of Toxic Cyanobacteria, ICTC13, Chania, Crete, 4-8 May 2025. Poster presentation., 2025.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Cyanobacteria, Λίμνες
@conference{nokey,
title = {Cyanobacteria community status of two natural lakes (Pamvotida, Zazari) in Greece},
author = {Lortou, U. and I. Nikolopoulou and A. Zacharioudaki and K. Aligizaki and K. Moschandreou and V. Tsiaoussi},
url = {http://hdl.handle.net/11340/2122},
year = {2025},
date = {2025-05-04},
urldate = {2025-05-04},
booktitle = {13th International Conference of Toxic Cyanobacteria, ICTC13, Chania, Crete, 4-8 May 2025. Poster presentation.},
abstract = {Cyanobacteria are among the most abundant microalgae taxa in freshwater lakes and play crucial role in their ecological dynamics. Cyanobacteria populations can proliferate significantly at elevated nutrient levels potentially leading to harmful blooms. Cyanobacterial biovolume (BV) can be used as a quantitative bioindicator in ecological studies and in monitoring potentially toxic cyanobacterial blooms. This study investigates the cyanobacterial community structure in two natural lakes. It presents a) the composition of cyanobacterial taxa, b) the temporal variations of cyanobacterial BV and c) a comparison between the lakes.},
keywords = {Cyanobacteria, Λίμνες},
pubstate = {published},
tppubtype = {conference}
}
Cyanobacteria are among the most abundant microalgae taxa in freshwater lakes and play crucial role in their ecological dynamics. Cyanobacteria populations can proliferate significantly at elevated nutrient levels potentially leading to harmful blooms. Cyanobacterial biovolume (BV) can be used as a quantitative bioindicator in ecological studies and in monitoring potentially toxic cyanobacterial blooms. This study investigates the cyanobacterial community structure in two natural lakes. It presents a) the composition of cyanobacterial taxa, b) the temporal variations of cyanobacterial BV and c) a comparison between the lakes.
Γιουρίεβα, Β.; Περιβολιώτη, Τ.; Τσιαούση, Β.
Ποικιλότητα της υδρόβιας χλωρίδας στην τεχνητή λίμνη Κερκίνη Αναρτημένη ανακοίνωση σε συνέδριο
8ο Πανελλήνιο Επιστημονικό Συνέδριο της Ελληνικής Βοτανικής Εταιρείας, Θεσσαλονίκη, 02-05 Οκτωβρίου 2024. Αναρτημένη Ανακοίνωση., 2024.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Υγρότοποι, Υδρόβια βλάστηση
@conference{nokey,
title = {Ποικιλότητα της υδρόβιας χλωρίδας στην τεχνητή λίμνη Κερκίνη},
author = {Β. Γιουρίεβα and Τ. Περιβολιώτη and Β. Τσιαούση},
url = {http://hdl.handle.net/11340/2127},
year = {2024},
date = {2024-10-02},
booktitle = {8ο Πανελλήνιο Επιστημονικό Συνέδριο της Ελληνικής Βοτανικής Εταιρείας, Θεσσαλονίκη, 02-05 Οκτωβρίου 2024. Αναρτημένη Ανακοίνωση.},
abstract = {Η τεχνητή λίμνη Κερκίνη είναι υγρότοπος Διεθνούς σημασίας σύμφωνα με τη σύμβαση Ραμσάρ και προστατευόμενη περιοχή του δικτύου Natura 2000. Στην παρούσα εργασία παρουσιάζονται τα προκαταρκτικά αποτελέσματα από την έρευνα της υδρόβιας χλωρίδας στην τεχνητή λίμνη Κερκίνη. Η καταγραφή και συλλογή των φυτικών taxa πραγματοποιήθηκε τον Μάιο 2024. Οι δειγματοληψίες πραγματοποιήθηκαν σε 20 δειγματοληπτικές λωρίδες (belt transects) σε όλη την λίμνη, τοποθετημένων κάθετα από την ακτή έως το μέγιστο βάθος αποίκισης των υδρόβιων μακροφύτων. Για την επιλογή των θέσεων δειγματοληψίας λήφθηκαν υπόψη η μορφολογία της λίμνης, η διαφοροποίηση των ενδιαιτημάτων και οι χρήσεις γης. Στην τεχνητή λίμνη Κερκίνη καταγράφηκαν συνολικά 28 υδρόβια φυτικά taxa από τις ακόλουθες κατηγορίες: ελόφυτα (11 taxa), επιπλέοντα (ριζωμένα και μη) (9 taxa) και βυθισμένα μακρόφυτα (8 taxa). Οι θέσεις με τη μεγαλύτερη ποικιλότητα υδρόβιων μακροφύτων εντοπίστηκαν στο δυτικό τμήμα της λίμνης, ενώ η μικρότερη ποικιλότητα βρέθηκε στη νότιο-ανατολική πλευρά της, όπου βρίσκεται το ανάχωμα. Τα βυθισμένα μακρόφυτα, κυρίως είδη του γένους Potamogeton, καταγράφηκαν σε βάθος έως έξι μέτρα. Αξιοσημείωτη είναι η παρουσία του είδους Marsilea quadrifolia, το οποίο περιλαμβάνεται στο Παράρτημα ΙΙ της Οδηγίας 92/43/ΕΟΚ (Οδηγία των Οικοτόπων) και η τεχνητή λίμνη Κερκίνη είναι η μοναδική περιοχή στην Ελλάδα στην οποία απαντά. Στην παρούσα έρευνα εντοπίστηκε στο δυτικό τμήμα με περιορισμένη εξάπλωση (σε 2 από τις 20 δειγματοληπτικές λωρίδες) και μικρή κάλυψη (<10% ανά δειγματοληπτική χλωρίδα). Η αποτύπωση της ποικιλότητας των υδρόβιων μακροφύτων αποτελεί σημαντικό εργαλείο για τη λήψη μέτρων διατήρησης και διαχείρισης στον υγρότοπο της Κερκίνης.},
keywords = {Υγρότοποι, Υδρόβια βλάστηση},
pubstate = {published},
tppubtype = {conference}
}
Η τεχνητή λίμνη Κερκίνη είναι υγρότοπος Διεθνούς σημασίας σύμφωνα με τη σύμβαση Ραμσάρ και προστατευόμενη περιοχή του δικτύου Natura 2000. Στην παρούσα εργασία παρουσιάζονται τα προκαταρκτικά αποτελέσματα από την έρευνα της υδρόβιας χλωρίδας στην τεχνητή λίμνη Κερκίνη. Η καταγραφή και συλλογή των φυτικών taxa πραγματοποιήθηκε τον Μάιο 2024. Οι δειγματοληψίες πραγματοποιήθηκαν σε 20 δειγματοληπτικές λωρίδες (belt transects) σε όλη την λίμνη, τοποθετημένων κάθετα από την ακτή έως το μέγιστο βάθος αποίκισης των υδρόβιων μακροφύτων. Για την επιλογή των θέσεων δειγματοληψίας λήφθηκαν υπόψη η μορφολογία της λίμνης, η διαφοροποίηση των ενδιαιτημάτων και οι χρήσεις γης. Στην τεχνητή λίμνη Κερκίνη καταγράφηκαν συνολικά 28 υδρόβια φυτικά taxa από τις ακόλουθες κατηγορίες: ελόφυτα (11 taxa), επιπλέοντα (ριζωμένα και μη) (9 taxa) και βυθισμένα μακρόφυτα (8 taxa). Οι θέσεις με τη μεγαλύτερη ποικιλότητα υδρόβιων μακροφύτων εντοπίστηκαν στο δυτικό τμήμα της λίμνης, ενώ η μικρότερη ποικιλότητα βρέθηκε στη νότιο-ανατολική πλευρά της, όπου βρίσκεται το ανάχωμα. Τα βυθισμένα μακρόφυτα, κυρίως είδη του γένους Potamogeton, καταγράφηκαν σε βάθος έως έξι μέτρα. Αξιοσημείωτη είναι η παρουσία του είδους Marsilea quadrifolia, το οποίο περιλαμβάνεται στο Παράρτημα ΙΙ της Οδηγίας 92/43/ΕΟΚ (Οδηγία των Οικοτόπων) και η τεχνητή λίμνη Κερκίνη είναι η μοναδική περιοχή στην Ελλάδα στην οποία απαντά. Στην παρούσα έρευνα εντοπίστηκε στο δυτικό τμήμα με περιορισμένη εξάπλωση (σε 2 από τις 20 δειγματοληπτικές λωρίδες) και μικρή κάλυψη (<10% ανά δειγματοληπτική χλωρίδα). Η αποτύπωση της ποικιλότητας των υδρόβιων μακροφύτων αποτελεί σημαντικό εργαλείο για τη λήψη μέτρων διατήρησης και διαχείρισης στον υγρότοπο της Κερκίνης.
Patsia, A.; Kemitzoglou, Dimitra; Mavromati, Efpraxia; Tsiaoussi, Vasiliki
Benthic macroinvertebrate communities in the littoral zone of Greek lakes Αναρτημένη ανακοίνωση σε συνέδριο
19th World Lake Conference, Balaton, Hungary, 7-9 November 2023. Poster presentation, 2023.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Μακροασπόνδυλα, Υγρότοποι
@conference{Patsia2023b,
title = {Benthic macroinvertebrate communities in the littoral zone of Greek lakes},
author = {A. Patsia and Dimitra Kemitzoglou and Efpraxia Mavromati and Vasiliki Tsiaoussi},
url = {http://hdl.handle.net/11340/2101},
year = {2023},
date = {2023-11-07},
urldate = {2023-11-07},
booktitle = {19th World Lake Conference, Balaton, Hungary, 7-9 November 2023. Poster presentation},
abstract = {Greek natural lakes are discerned into three categories according to depth: very shallow lakes (GR-VSNL, mean depth< 3m), shallow lakes (GR-SNL, mean depth: 3-9 m) and deep lakes (GR-DNL, mean depth >9 m) (Kagalou et al., 2021). Lake zoobenthos is regularly examined for the classification of ecological status according to Water Framework Directive (WFD) (EU, 2000). Research objectives are to present the benthic macroinvertebrate communities in the Greek natural lakes, classify their ecological status & to investigate potential differences in benthic macroinvertebrate communities according to lake depth.},
keywords = {Λίμνες, Μακροασπόνδυλα, Υγρότοποι},
pubstate = {published},
tppubtype = {conference}
}
Greek natural lakes are discerned into three categories according to depth: very shallow lakes (GR-VSNL, mean depth< 3m), shallow lakes (GR-SNL, mean depth: 3-9 m) and deep lakes (GR-DNL, mean depth >9 m) (Kagalou et al., 2021). Lake zoobenthos is regularly examined for the classification of ecological status according to Water Framework Directive (WFD) (EU, 2000). Research objectives are to present the benthic macroinvertebrate communities in the Greek natural lakes, classify their ecological status & to investigate potential differences in benthic macroinvertebrate communities according to lake depth.
Nikolopoulou, I.; Navrozidou, V.; Moschandreou, Kimon; Kemitzoglou, Dimitra; Tsiaoussi, Vasiliki
Phytoplankton and Ecological status of natural lakes in Greece Αναρτημένη ανακοίνωση σε συνέδριο
Eighth European Phycological Congress-EPC8 "Scientific Opportunities for a Global Algal Revolution", Brest, Brittany, France, 20-26 August 2023. Poster presentation., 2023.
Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Υγρότοποι, Φυτοπλαγκτόν
@conference{Nikolopoulou2023,
title = {Phytoplankton and Ecological status of natural lakes in Greece},
author = {I. Nikolopoulou and V. Navrozidou and Kimon Moschandreou and Dimitra Kemitzoglou and Vasiliki Tsiaoussi},
url = {http://hdl.handle.net/11340/2089},
year = {2023},
date = {2023-08-20},
urldate = {2023-08-20},
booktitle = {Eighth European Phycological Congress-EPC8 "Scientific Opportunities for a Global Algal Revolution", Brest, Brittany, France, 20-26 August 2023. Poster presentation.},
keywords = {Λίμνες, Υγρότοποι, Φυτοπλαγκτόν},
pubstate = {published},
tppubtype = {conference}
}
Kemitzoglou, Dimitra; Karadimou, E.; Katsavouni, S.; Navrozidou, V.; Nikolopoulou, I.; Seferlis, Miltiadis; Zerva, I.; Tsiaoussi, Vasiliki
Proposing biologically-based nutrient thresholds for Greek Lakes Αναρτημένη ανακοίνωση σε συνέδριο
13th Symposium for European Freshwater Sciences. Newcastle, UK 18-23/06/2023. Poster presentation. Η Συλλογή του ΕΚΒΥ, 2023.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Υγρότοποι, Φυσικοχημική ανάλυση
@conference{Kemitzoglou2023,
title = {Proposing biologically-based nutrient thresholds for Greek Lakes},
author = {Dimitra Kemitzoglou and E. Karadimou and S. Katsavouni and V. Navrozidou and I. Nikolopoulou and Miltiadis Seferlis and I. Zerva and Vasiliki Tsiaoussi},
url = {http://hdl.handle.net/11340/2084},
year = {2023},
date = {2023-06-18},
urldate = {2023-06-18},
publisher = {13th Symposium for European Freshwater Sciences. Newcastle, UK 18-23/06/2023. Poster presentation. Η Συλλογή του ΕΚΒΥ},
abstract = {According to WFD, the composition and abundance of biological communities guide the assessment of lake ecological status; physicochemical parameters, such as nutrients, are supportive elements in this process. In this context, the thresholds of Good-Moderate (GM) status for Total Phosphorus concentrations (TP) in two high alkalinity lake types in Greece have been proposed using a European toolkit. Our objective was to investigate the conformity of GM thresholds for TP with changes in biological communities of two types of lake ecosystems, shallow polymictic and warm monomictic, in Greece. We examined pressure response relationships using data collated from the National Monitoring Network. We plotted parameters of phytoplankton, aquatic macrophytes and water transparency across TP concentrations in the two types of natural lakes. In TP threshold values of 20-40 μg/l changes in biological communities and water transparency were observed in both lake types. These nutrient thresholds seem comparable with the ones proposed with the application of a standard toolkit. Changes in the composition and abundance of biological communities, as well as in water transparency, appear to be explained by TP concentrations in two types of natural lakes in Greece. Efforts should focus in minimizing phosphorus loading in lake waters.},
keywords = {Λίμνες, Υγρότοποι, Φυσικοχημική ανάλυση},
pubstate = {published},
tppubtype = {conference}
}
According to WFD, the composition and abundance of biological communities guide the assessment of lake ecological status; physicochemical parameters, such as nutrients, are supportive elements in this process. In this context, the thresholds of Good-Moderate (GM) status for Total Phosphorus concentrations (TP) in two high alkalinity lake types in Greece have been proposed using a European toolkit. Our objective was to investigate the conformity of GM thresholds for TP with changes in biological communities of two types of lake ecosystems, shallow polymictic and warm monomictic, in Greece. We examined pressure response relationships using data collated from the National Monitoring Network. We plotted parameters of phytoplankton, aquatic macrophytes and water transparency across TP concentrations in the two types of natural lakes. In TP threshold values of 20-40 μg/l changes in biological communities and water transparency were observed in both lake types. These nutrient thresholds seem comparable with the ones proposed with the application of a standard toolkit. Changes in the composition and abundance of biological communities, as well as in water transparency, appear to be explained by TP concentrations in two types of natural lakes in Greece. Efforts should focus in minimizing phosphorus loading in lake waters.
Navrozidou, V.; Nikolopoulou, I.; Katsavouni, S.; Seferlis, Miltiadis; Tsiaoussi, Vasiliki
Phytoplankton taxonomic groups in relation to physicochemical parameters. A case study from Greek lakes Αναρτημένη ανακοίνωση σε συνέδριο
13th Symposium for European Freshwater Sciences. Newcastle, UK 18-23/06/2023. Poster presentation. Η Συλλογή του ΕΚΒΥ, 2023.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Υγρότοποι, Φυσικοχημική ανάλυση, Φυτοπλαγκτόν
@conference{Navrozidou2023,
title = {Phytoplankton taxonomic groups in relation to physicochemical parameters. A case study from Greek lakes},
author = {V. Navrozidou and I. Nikolopoulou and S. Katsavouni and Miltiadis Seferlis and Vasiliki Tsiaoussi},
url = {http://hdl.handle.net/11340/2083},
year = {2023},
date = {2023-06-18},
urldate = {2023-06-18},
publisher = {13th Symposium for European Freshwater Sciences. Newcastle, UK 18-23/06/2023. Poster presentation. Η Συλλογή του ΕΚΒΥ},
abstract = {The composition, abundance and biomass of phytoplankton are long considered as indicative of the eutrophication pressure in lakes. In addition, cyanobacteria-formed algal blooms are mostly linked to poor water quality. The objectives of the present study were a) to explore phytoplankton groups and physicochemical parameters of lakes in a Mediterranean setting and b) to investigate the response of phytoplankton taxonomic groups to phosphorus loading in those lakes. We analyzed data from the National Monitoring Network from 2019-2021 for 16 freshwater lakes in Greece. Water transparency, ionic composition and Total Phosphorus (TP) were correlated with major phytoplankton groups (chlorophytes, dinoflagellates, cryptophytes, bacillariophyceae and cyanobacteria). Based on both phytoplankton and physicochemical parameters, two groups of lakes were formed in cluster analysis, corresponding a) to deep warm monomictic and b) shallow and very shallow polymictic lakes. With regard to the impact from phosphorus loading, in both groups of lakes, a considerable increase of cyanobacteria biomass along a TP gradient was observed. Chlorophytes showed a statistically significant response in relation to TP in shallow and very shallow lakes. The results highlight the importance of phytoplankton in monitoring and evaluation of the status of aquatic ecosystems as phytoplankton biomass and community structure respond to changes in environmental parameters.},
keywords = {Λίμνες, Υγρότοποι, Φυσικοχημική ανάλυση, Φυτοπλαγκτόν},
pubstate = {published},
tppubtype = {conference}
}
The composition, abundance and biomass of phytoplankton are long considered as indicative of the eutrophication pressure in lakes. In addition, cyanobacteria-formed algal blooms are mostly linked to poor water quality. The objectives of the present study were a) to explore phytoplankton groups and physicochemical parameters of lakes in a Mediterranean setting and b) to investigate the response of phytoplankton taxonomic groups to phosphorus loading in those lakes. We analyzed data from the National Monitoring Network from 2019-2021 for 16 freshwater lakes in Greece. Water transparency, ionic composition and Total Phosphorus (TP) were correlated with major phytoplankton groups (chlorophytes, dinoflagellates, cryptophytes, bacillariophyceae and cyanobacteria). Based on both phytoplankton and physicochemical parameters, two groups of lakes were formed in cluster analysis, corresponding a) to deep warm monomictic and b) shallow and very shallow polymictic lakes. With regard to the impact from phosphorus loading, in both groups of lakes, a considerable increase of cyanobacteria biomass along a TP gradient was observed. Chlorophytes showed a statistically significant response in relation to TP in shallow and very shallow lakes. The results highlight the importance of phytoplankton in monitoring and evaluation of the status of aquatic ecosystems as phytoplankton biomass and community structure respond to changes in environmental parameters.
Patsia, A.; Kemitzoglou, Dimitra; Mavromati, Efpraxia; Tsiaoussi, Vasiliki
Spatial and temporal variations of benthic macroinvertebrate communities in Lake Kastoria, Greece Αναρτημένη ανακοίνωση σε συνέδριο
13th Symposium for European Freshwater Sciences. Newcastle, UK 18-23/06/2023. Poster presentation. Η Συλλογή του ΕΚΒΥ, 2023.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Μακροασπόνδυλα, Υγρότοποι
@conference{Patsia2023,
title = {Spatial and temporal variations of benthic macroinvertebrate communities in Lake Kastoria, Greece},
author = {A. Patsia and Dimitra Kemitzoglou and Efpraxia Mavromati and Vasiliki Tsiaoussi},
url = {http://hdl.handle.net/11340/2085},
year = {2023},
date = {2023-06-18},
publisher = {13th Symposium for European Freshwater Sciences. Newcastle, UK 18-23/06/2023. Poster presentation. Η Συλλογή του ΕΚΒΥ},
abstract = {Lake Kastoria, in northwestern Greece, is a shallow urban natural lake. The objectives of this study were a) to investigate spatial and temporal variations of benthic macroinvertebrate communities in Lake Kastoria and b) to assess the lake water quality with the use of a WFD-compliant national method. Samplings were undertaken at the littoral zone of the lake at 5 selected sites during spring 2017 and 2021, according to the Hellenic Lake Littoral Benthos (HeLLBI) assessment method. Non-metric multidimensional (NMDS) scaling and one-way analysis of similarity percentages were applied to visualize similarities and to identify the taxa responsible for the discrimination in benthic macroinvertebrate communities between different sampling periods, among sites and water quality classes. In total, 5569 individuals were collected and 37 taxa groups were identified. NMDS plot provided a useful display of the actual multivariate distance among samples (stress value: 0.14). Benthic invertebrate communities showed considerable spatial variation at local scale (sampling site level) except for one site but no clear temporal variation. The mean EQR value of HeLLBI showed moderate water quality of the lake. All sites showed no change in their water quality across time except for 2 sites that improved (poor to moderate and good respectively). Benthic macroinvertebrates communities at good water quality sites differed in composition and showed higher biodiversity compared to those at moderate and poor sites. Management measures should be site-adapted in Lake Kastoria and priority could be given to the conservation and restoration of the littoral zone.},
keywords = {Λίμνες, Μακροασπόνδυλα, Υγρότοποι},
pubstate = {published},
tppubtype = {conference}
}
Lake Kastoria, in northwestern Greece, is a shallow urban natural lake. The objectives of this study were a) to investigate spatial and temporal variations of benthic macroinvertebrate communities in Lake Kastoria and b) to assess the lake water quality with the use of a WFD-compliant national method. Samplings were undertaken at the littoral zone of the lake at 5 selected sites during spring 2017 and 2021, according to the Hellenic Lake Littoral Benthos (HeLLBI) assessment method. Non-metric multidimensional (NMDS) scaling and one-way analysis of similarity percentages were applied to visualize similarities and to identify the taxa responsible for the discrimination in benthic macroinvertebrate communities between different sampling periods, among sites and water quality classes. In total, 5569 individuals were collected and 37 taxa groups were identified. NMDS plot provided a useful display of the actual multivariate distance among samples (stress value: 0.14). Benthic invertebrate communities showed considerable spatial variation at local scale (sampling site level) except for one site but no clear temporal variation. The mean EQR value of HeLLBI showed moderate water quality of the lake. All sites showed no change in their water quality across time except for 2 sites that improved (poor to moderate and good respectively). Benthic macroinvertebrates communities at good water quality sites differed in composition and showed higher biodiversity compared to those at moderate and poor sites. Management measures should be site-adapted in Lake Kastoria and priority could be given to the conservation and restoration of the littoral zone.
Karadimou, E.; Chrysopolitou, V.; Katsavouni, S.; Navrozidou, V.; Papadimos, Dimitris; Zervas, Dimitrios; Tsiaoussi, Vasiliki
Lake Koronia, a wetland in gradual recovery process or a flash from the past? Αναρτημένη ανακοίνωση σε συνέδριο
6th European Congress of Conservation Biology: “Biodiversity crisis in a changing world”, Prague, Czech Republic 22-26/08/2022. Poster presentation. Η Συλλογή του ΕΚΒΥ, 2022.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Υγρότοποι
@conference{Karadimou2022,
title = {Lake Koronia, a wetland in gradual recovery process or a flash from the past?},
author = {E. Karadimou and V. Chrysopolitou and S. Katsavouni and V. Navrozidou and Dimitris Papadimos and Dimitrios Zervas and Vasiliki Tsiaoussi},
url = {http://hdl.handle.net/11340/2079},
year = {2022},
date = {2022-08-22},
urldate = {2022-08-22},
publisher = {6th European Congress of Conservation Biology: “Biodiversity crisis in a changing world”, Prague, Czech Republic 22-26/08/2022. Poster presentation. Η Συλλογή του ΕΚΒΥ},
abstract = {Lake Koronia, Greece, is a wetland of international and European importance (Ramsar and Natura 2000 site). The lake has deteriorated in terms of habitats, water quantity and quality since 1995, resulting in mass fish and bird deaths. We monitored abiotic and biotic (aquatic macrophytes) parameters between 2015 and 2021 to investigate recovery progress, following implementation efforts of a restoration plan. Abiotic conditions were recorded monthly/seasonally, while vegetation data were recorded in two periods (June 2017, 2020). After an initial considerable increase in water level, mean annual values fluctuated at around 70-71 m asl. Water transparency values were low while conductivity values were high. Three vegetation units were present: Lemnetea, Potamogetonetea and Phragmitetea, represented by few taxa. Helophytic taxa formed a narrow littoral reedbed (< 10 % of the lake area). Few rooted hydrophytes were present but limited to sparse patches (< 5 % of the total abundance). These results indicate that vegetation stabilization or even further expansion could be possible, given that hydrological and physicochemical conditions improve. The possible recovery of this fragile ecosystem depends on both the mitigation of anthropogenic pressures and favourable natural conditions. The continuation of restoration measures and monitoring efforts are considered necessary in this direction.},
keywords = {Λίμνες, Υγρότοποι},
pubstate = {published},
tppubtype = {conference}
}
Lake Koronia, Greece, is a wetland of international and European importance (Ramsar and Natura 2000 site). The lake has deteriorated in terms of habitats, water quantity and quality since 1995, resulting in mass fish and bird deaths. We monitored abiotic and biotic (aquatic macrophytes) parameters between 2015 and 2021 to investigate recovery progress, following implementation efforts of a restoration plan. Abiotic conditions were recorded monthly/seasonally, while vegetation data were recorded in two periods (June 2017, 2020). After an initial considerable increase in water level, mean annual values fluctuated at around 70-71 m asl. Water transparency values were low while conductivity values were high. Three vegetation units were present: Lemnetea, Potamogetonetea and Phragmitetea, represented by few taxa. Helophytic taxa formed a narrow littoral reedbed (< 10 % of the lake area). Few rooted hydrophytes were present but limited to sparse patches (< 5 % of the total abundance). These results indicate that vegetation stabilization or even further expansion could be possible, given that hydrological and physicochemical conditions improve. The possible recovery of this fragile ecosystem depends on both the mitigation of anthropogenic pressures and favourable natural conditions. The continuation of restoration measures and monitoring efforts are considered necessary in this direction.
Zervas, Dimitrios; Tsiaoussi, Vasiliki; Tsiripidis, Ioannis
Phytosociological analysis of the aquatic vegetation of the main Greek freshwater lakes Αναρτημένη ανακοίνωση σε συνέδριο
11th Symposium for European Freshwater Sciences. Zagreb, Croatia 30/06-05/07/2019. Poster presentation. Η Συλλογή του ΕΚΒΥ, 2019.
Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες, Υγρότοποι, Υδρόβια βλάστηση
@conference{Zervas2019b,
title = {Phytosociological analysis of the aquatic vegetation of the main Greek freshwater lakes},
author = {Dimitrios Zervas and Vasiliki Tsiaoussi and Ioannis Tsiripidis},
url = {http://hdl.handle.net/11340/1972},
year = {2019},
date = {2019-06-30},
urldate = {2019-06-30},
publisher = {11th Symposium for European Freshwater Sciences. Zagreb, Croatia 30/06-05/07/2019. Poster presentation. Η Συλλογή του ΕΚΒΥ},
keywords = {Λίμνες, Υγρότοποι, Υδρόβια βλάστηση},
pubstate = {published},
tppubtype = {conference}
}
Kemitzoglou, Dimitra; Apostolakis, Antonis; Katsavouni, S.; Mavromati, Efpraxia; Papadimos, Dimitris; Tsiaoussi, Vasiliki
Hydromorphological features of Greek lakes: First results from the monitoring network Αναρτημένη ανακοίνωση σε συνέδριο
9th Symposium for European Freshwater Sciences. Geneva, Switzerland 05-10/07/2015. Poster presentation. Η Συλλογή του ΕΚΒΥ. Η Συλλογή του ΕΚΒΥ, 2015.
Σύνδεσμοι | BibTeX | Ετικέτες: Hydromorphology, Λίμνες, Υγρότοποι
@conference{nokey,
title = {Hydromorphological features of Greek lakes: First results from the monitoring network},
author = {Dimitra Kemitzoglou and Antonis Apostolakis and S. Katsavouni and Efpraxia Mavromati and Dimitris Papadimos and Vasiliki Tsiaoussi},
url = {http://hdl.handle.net/11340/2087},
year = {2015},
date = {2015-07-05},
urldate = {2015-07-05},
publisher = {9th Symposium for European Freshwater Sciences. Geneva, Switzerland 05-10/07/2015. Poster presentation. Η Συλλογή του ΕΚΒΥ. Η Συλλογή του ΕΚΒΥ},
keywords = {Hydromorphology, Λίμνες, Υγρότοποι},
pubstate = {published},
tppubtype = {conference}
}
Book Chapters
Tsiaoussi, Vasiliki; Mavromati, Efpraxia; Demertzi, Kleoniki; Giourieva, Victoria; Katsavouni, Sotiria; Kemitzoglou, Dimitra; Navrozidou, Valentini; Nikolopoulou, Iliana; Papadimos, Dimitrios; Patsia, Athina; Seferlis, Miltiadis; Skopa, Maria; Varsami, Eirini; Zerva, Ioanna; Zioga, Marianthi
Current Status of Greek Lakes and Future Perspectives: Results from WFD Monitoring Book Chapter
In: Stefanidis, Konstantinos; Oikonomou, Anthi; Dimitriou, Elias (Ed.): Lakes of the Eastern Mediterranean and Balkans, pp. 149–182, Springer Nature Switzerland, 2025, 2026, ISBN: 978-3-032-02168-7.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Assessment, Biological indicators, Ecological status, Greek lakes, Hydrology, Monitoring, Physicochemical parameters, WFD
@inbook{Tsiaoussi2025,
title = {Current Status of Greek Lakes and Future Perspectives: Results from WFD Monitoring},
author = {Tsiaoussi, Vasiliki and Mavromati, Efpraxia and Demertzi, Kleoniki and Giourieva, Victoria and Katsavouni, Sotiria and Kemitzoglou, Dimitra and Navrozidou, Valentini and Nikolopoulou, Iliana and Papadimos, Dimitrios and Patsia, Athina and Seferlis, Miltiadis and Skopa, Maria and Varsami, Eirini and Zerva, Ioanna and Zioga, Marianthi},
editor = {Stefanidis, Konstantinos and Oikonomou, Anthi and Dimitriou, Elias},
url = {https://doi.org/10.1007/978-3-032-02168-7_5},
doi = {10.1007/978-3-032-02168-7_5},
isbn = {978-3-032-02168-7},
year = {2026},
date = {2026-01-02},
urldate = {2026-01-02},
booktitle = {Lakes of the Eastern Mediterranean and Balkans},
pages = {149–182},
publisher = {Springer Nature Switzerland},
edition = {2025},
abstract = {Lakes host rich biodiversity and provide valuable ecosystem services, including water for human and economic use. However, knowledge of lake ecosystems in Greece was previously limited. This gap has been addressed by the substantial increase in data from the National Lake Monitoring Network, which has been operational since 2012. The EU Water Framework Directive (WFD) has set the guidelines for lake monitoring and assessment systems. In this chapter, we present the key characteristics, ecological status, and trends of 49 Greek lakes between 2016 and 2022, as assessed according to the WFD. Overall, 55{%} of the lakes were classified as having good or better ecological status/potential. Of the remaining lakes, 33{%} were rated as moderate, 10{%} were classified as poor, and only 2{%} were rated as having bad ecological status. Specifically, the majority of reservoirs (85{%}) were assessed as having good or above ecological potential, while only 22{%} of natural lakes were rated similarly. The majority of natural lakes were classified as having moderate (52{%}), poor (22{%}), or bad ecological status (4{%}). Monitoring activities have played a crucial role in improving our understanding of the structure and functioning of lake ecosystems across different spatial and temporal scales. Additionally, the national monitoring network has created a valuable time series of data documenting the status and trends of Greek lakes, available to all interested parties. Authorities and other stakeholders can use these data to prioritize relevant conservation and restoration measures and assess their effectiveness.},
keywords = {Assessment, Biological indicators, Ecological status, Greek lakes, Hydrology, Monitoring, Physicochemical parameters, WFD},
pubstate = {published},
tppubtype = {inbook}
}
Lakes host rich biodiversity and provide valuable ecosystem services, including water for human and economic use. However, knowledge of lake ecosystems in Greece was previously limited. This gap has been addressed by the substantial increase in data from the National Lake Monitoring Network, which has been operational since 2012. The EU Water Framework Directive (WFD) has set the guidelines for lake monitoring and assessment systems. In this chapter, we present the key characteristics, ecological status, and trends of 49 Greek lakes between 2016 and 2022, as assessed according to the WFD. Overall, 55{%} of the lakes were classified as having good or better ecological status/potential. Of the remaining lakes, 33{%} were rated as moderate, 10{%} were classified as poor, and only 2{%} were rated as having bad ecological status. Specifically, the majority of reservoirs (85{%}) were assessed as having good or above ecological potential, while only 22{%} of natural lakes were rated similarly. The majority of natural lakes were classified as having moderate (52{%}), poor (22{%}), or bad ecological status (4{%}). Monitoring activities have played a crucial role in improving our understanding of the structure and functioning of lake ecosystems across different spatial and temporal scales. Additionally, the national monitoring network has created a valuable time series of data documenting the status and trends of Greek lakes, available to all interested parties. Authorities and other stakeholders can use these data to prioritize relevant conservation and restoration measures and assess their effectiveness.
Χάρτες
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης; Σκόπα, Μ.
Χάρτης Βαθυμετρίας λίμνης Λυσιμαχείας Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:12.000, 2017.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2017,
title = {Χάρτης Βαθυμετρίας λίμνης Λυσιμαχείας},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος and Μ. Σκόπα},
url = {http://hdl.handle.net/11340/1942},
year = {2017},
date = {2017-09-01},
urldate = {2017-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:12.000},
abstract = {Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 - 2020.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 – 2020.
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης; Ζέρβας, Δημήτριος
Χάρτης Βαθυμετρίας λίμνης Οζερού Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:12.000, 2017.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2017b,
title = {Χάρτης Βαθυμετρίας λίμνης Οζερού},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος and Δημήτριος Ζέρβας},
url = {http://hdl.handle.net/11340/1943},
year = {2017},
date = {2017-09-01},
urldate = {2017-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:12.000},
abstract = {Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 - 2020.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 – 2020.
Αποστολάκης, Αντώνης; Δουλγέρης, Χαράλαμπος
Χάρτης Βαθυμετρίας λίμνης Χειμαδίτιδας Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:15.000, 2017.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2017c,
title = {Χάρτης Βαθυμετρίας λίμνης Χειμαδίτιδας},
author = {Αντώνης Αποστολάκης and Χαράλαμπος Δουλγέρης},
url = {http://hdl.handle.net/11340/1967},
year = {2017},
date = {2017-09-01},
urldate = {2017-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:15.000},
abstract = {Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 - 2020.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 – 2020.
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης
Χάρτης Βαθυμετρίας λίμνης Αμβρακίας Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:20.000, 2016.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2016,
title = {Χάρτης Βαθυμετρίας λίμνης Αμβρακίας},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος},
url = {http://hdl.handle.net/11340/1937},
year = {2016},
date = {2016-09-01},
urldate = {2016-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:20.000},
abstract = {Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 - 2020.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 – 2020.
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης
Χάρτης Βαθυμετρίας λίμνης Βεγορίτιδας Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:20.000, 2016.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2016b,
title = {Χάρτης Βαθυμετρίας λίμνης Βεγορίτιδας},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος},
url = {http://hdl.handle.net/11340/1938},
year = {2016},
date = {2016-09-01},
urldate = {2016-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:20.000},
abstract = {Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 - 2020.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 – 2020.
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης
Χάρτης Βαθυμετρίας λίμνης Παμβώτιδας Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:15.000, 2016.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2016c,
title = {Χάρτης Βαθυμετρίας λίμνης Παμβώτιδας},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος},
url = {http://hdl.handle.net/11340/1939},
year = {2016},
date = {2016-09-01},
urldate = {2016-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:15.000},
abstract = {Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 - 2020.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Ο παρών χάρτης εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ταμείο συνοχής και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Υποδομές Μεταφορών, Περιβάλλον και Αειφόρος Ανάπτυξη 2014 – 2020.
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης; Χατζηιορδάνου, Ελένη; Μαυρομάτη, Ευπραξία
Χάρτης Βαθυμετρίας λίμνης Βόλβης Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:35.000, 2015.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2015,
title = {Χάρτης Βαθυμετρίας λίμνης Βόλβης},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος and Ελένη Χατζηιορδάνου and Ευπραξία Μαυρομάτη},
url = {http://hdl.handle.net/11340/1934},
year = {2015},
date = {2015-09-01},
urldate = {2015-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:35.000},
abstract = {Το παρόν εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ευρωπαϊκό Ταμείο Περιφερειακής Ανάπτυξης και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Περιβάλλον και Αειφόρος Ανάπτυξη 2007 - 2013.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Το παρόν εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ευρωπαϊκό Ταμείο Περιφερειακής Ανάπτυξης και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Περιβάλλον και Αειφόρος Ανάπτυξη 2007 – 2013.
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης; Ζέρβας, Δημήτριος
Χάρτης Βαθυμετρίας λίμνης Ζάζαρης Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:12.000, 2015.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2015b,
title = {Χάρτης Βαθυμετρίας λίμνης Ζάζαρης},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος and Δημήτριος Ζέρβας},
url = {http://hdl.handle.net/11340/1935},
year = {2015},
date = {2015-09-01},
urldate = {2015-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:12.000},
abstract = {Το παρόν εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ευρωπαϊκό Ταμείο Περιφερειακής Ανάπτυξης και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Περιβάλλον και Αειφόρος Ανάπτυξη 2007 - 2013.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Το παρόν εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ευρωπαϊκό Ταμείο Περιφερειακής Ανάπτυξης και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Περιβάλλον και Αειφόρος Ανάπτυξη 2007 – 2013.
Αποστολάκης, Αντώνης; Παπαδήμος, Δημήτρης; Δουλγέρης, Χαράλαμπος
Χάρτης Βαθυμετρίας λίμνης Παραλίμνης Χάρτης
In: Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:10.000, 2015.
Περίληψη | Σύνδεσμοι | BibTeX | Ετικέτες: Λίμνες
@inproceedings{Αποστολάκης2015c,
title = {Χάρτης Βαθυμετρίας λίμνης Παραλίμνης},
author = {Αντώνης Αποστολάκης and Δημήτρης Παπαδήμος and Χαράλαμπος Δουλγέρης},
url = {http://hdl.handle.net/11340/1936},
year = {2015},
date = {2015-09-01},
urldate = {2015-09-01},
publisher = {Ελληνικό Κέντρο Βιοτόπων-Υγροτόπων (ΕΚΒΥ). Κλίμακα 1:10.000},
abstract = {Το παρόν εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων - Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ευρωπαϊκό Ταμείο Περιφερειακής Ανάπτυξης και εθνικοί πόροι - Επιχειρησιακό Πρόγραμμα Περιβάλλον και Αειφόρος Ανάπτυξη 2007 - 2013.},
keywords = {Λίμνες},
pubstate = {published},
tppubtype = {inproceedings}
}
Το παρόν εκπονήθηκε στο πλαίσιο του Εθνικού Δικτύου Παρακολούθησης της ποιότητας και της ποσότητας των υδάτων των λιμνών (ΚΥΑ Αριθμ. οικ. 140384/2011) που υλοποιείται από το Ελληνικό Κέντρο Βιοτόπων – Υγροτόπων, υπό τον συντονισμό και επίβλεψη της Ειδικής Γραμματείας Υδάτων. Χρηματοδότηση: Ευρωπαϊκό Ταμείο Περιφερειακής Ανάπτυξης και εθνικοί πόροι – Επιχειρησιακό Πρόγραμμα Περιβάλλον και Αειφόρος Ανάπτυξη 2007 – 2013.