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Item type:EMFIG - EKBY Collection, Application of a 2D-Hydrodynamic Model to Assess the Impact of Spring Water Discharge into the Lake Pamvotida in Ioannina, Greece(2025-11-25) ;K. ZachopoulosD. PapadimosAccording 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. - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Application of a 2D-Hydrodynamic Model to Assess the Impact of Spring Water Discharge into the Lake Pamvotida in Ioannina, Greece (Poster Presentation)(2025-11-25) ;K. ZachopoulosD. PapadimosThe Greek Biotope Wetland Centre conducted a study to assess the minimum water level (WL) requirements of Lake Pamvotida, which should be maintained within the range of 469.10-468.20m, a.m.s.l. However, the lake is susceptible to larger reductions in its water level in late summer due to increase devaporation and over-pumping for irrigation. The study investigated the introduction of freshwater from Sentenikos and Kalithea Springs into Lake Pamvotida to mitigate the decrease in its water level during the dry season. The results revealed a notable alteration in the lake’s water level fluctuations, accompanied by measurable impacts on Temperature and Biochemical Oxygen Demand (BOD). - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Establishing Total Phosphorus Boundaries to Support Good Ecological Status of Greek Lakes and Reservoirs in Accordance with the Water Framework Directive(2025-11-24) ;M. Zioga ;D. Kemitzoglou ;I. Zerva ;S. KatsavouniI.KagalouEutrophication, driven by nutrient enrichment, represents substantial anthropogenic pressure with harmful consequences for aquatic ecosystems. TheWater 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. - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Assessment of minimum ecological water requirements in Lake Pamvotida – Greece, using an adaptation of the IFIM method(2025-11-24)D. PapadimosHuman interventions and climate change in the Greek territory, so far accompanied by higher temperatures and reduced precipitations, are already exerting pressure on the water level (WL) of the lakes (Papadimos et al., 2022). The severity of the impact of the above pressures on lake ecosystems depends on the magnitude of their WL changes, the duration, the timing of their occurrence during the year and the organisms that occur in the ecosystem (Leira and Cantonati 2008). Therefore, the identification of the ecological water level requirements (EWLR) of the lakes should be considered both necessary and imperative for the conservation and protection of their ecosystems and the services they provide. A variety of methodological approaches have been used to estimate EWLR in lakes. Among them hydraulic models, combination of historical WL data and the ecological requirements at different life stages of aquatic macrophytes, the protection requirements of specific aquatic flora and fauna species sensitive to hydrological pressures etc. In this research, we have used an adaptation of the Instream Flow Incremental Method (IFIM, Bovee 1982), which has been mainly applied to streams and rivers, to assess the EWLR of Lake Pamvotida, on the basis of the requirements of its habitat types and species whose conservation depends directly or indirectly on water regime. In addition, justified management measures related to the water balance of the lake have been elaborated and proposed to support the EWLR. - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Spatio-temporal changes of littoral macrophytes along hydrological conditions in Yliki, a Greek lake(2025-11-24) ;E. Mavromati ;V. Giourieva ;D. Papadimos ;A. ApostolakisV. TsiaoussiHuman-induced changes in hydrological conditions seem to be among the main factors affecting ecological relationships in lakes (Zhao et al., 2021). Water level fluctuation (WLF), which is often attributed to anthropogenic activities and its amplitude variations can have an impact on aquatic plant communities by altering several key environmental factors (Hill et al., 1998, Zhao et al., 2021). These fluctuations influence water depth, underwater irradiance, water quality, and dissolved oxygen levels, all of which play crucial roles in the growth and survival of macrophytes (Li et al., 2017). The interplay of these factors can significantly change the growing conditions for several macrophyte species over time. To overcome this, macrophytes have evolved to adjust gradually to periodic WLF over time, as part of their long-term evolutionary process (Zhao et al., 2021). The aims of the study are to present the results of WLF over time in Lake Yliki, study its aquatic plant community and explore the effect of WLFs on macrophytes. - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Καταγραφή άνθισης φυτοπλαγκτού στη Λίμνη Μεγάλη Πρέσπα (Μάρτιος 2025)(2025-11-18) ;Η. Νικολοπούλου ;Τ. ΠεριβολιώτηΒ. ΤσιαούσηΣκοπός της παρούσας εργασίας είναι η παρουσίαση των αποτελεσμάτων ενός επεισοδίου άνθισης φυτοπλαγκτού που σημειώθηκε στη Λίμνη Μεγάλη Πρέσπα τον Μάρτιο του 2025. Δειγματοληψίες πεδίου και τεχνικές τηλεπισκόπησης πραγματοποιήθηκαν για την παρακολούθηση του φαινομένου της άνθισης. Επιπλέον, χρησιμοποιήθηκαν δορυφορικές εικόνες Sentinel-2 για τη χαρτογράφηση της χωρικής έκτασης της άνθισης με χρήση του δείκτη NDCI (Normalized Difference Chlorophyll Index). Τα δείγματα άνθισης που συλλέχθηκαν κατά τη διάρκεια της δειγματοληψίας αποκάλυψαν ότι το κυρίαρχο είδος ήταν το Aphanizomenon flos-aquae morphotype από τα κυανοβακτήρια. Οι επιτόπιες παρατηρήσεις έδειξαν σημαντική επιφανειακή συσσώρευση βιομάζας φυτοπλαγτκού σε παρόχθιες περιοχές, συνοδευόμενη από αποσύνθεση οργανικής ύλης, γεγονός που υποδηλώνει προχωρημένο στάδιο ανάπτυξης της άνθισης. Ο συνδυασμός δορυφορικών δεδομένων και δειγματοληψιών πεδίου συνέβαλε στην αποτελεσματική παρακολούθηση και αξιολόγηση της δυναμικής της άνθισης στο οικοσύστημα της λίμνης. - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Μελέτη των Characeae σε δύο ολιγότροφες λίμνες: αποτελέσματα του Εθνικού Δικτύου Παρακολούθησης λιμνών(2025-11-18) ;Β. Γιουρίεβα ;Ε. ΜαυρομάτηΒ. ΤσιαούσηΤα 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. - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Spatio-temporal changes of littoral macrophytes along hydrological conditions in Yliki, a Greek lake (Presentation)(2025-11-18) ;E. Mavromati ;V. Giourieva ;D. Papadimos ;A. ApostolakisV. Tsiaoussi - Some of the metrics are blocked by yourconsent settings
Item type:EMFIG - EKBY Collection, Αξιολόγηση της δυναμικής των εκπομπών άνθρακα στους ελληνικούς υγροτόπους: η περίπτωση της περιοχής Ραμσάρ Λίμνη Κερκίνη(2025-11-18) ;Α. Χατζημέντωρ ;Μ. Ζιώγα ;C. Rochera Cordellat ;Δ. ΚεμιτζόγλουΒ. Τσιαούση
