Μαυρομάτη, Ευπραξία
Preferred name
Μαυρομάτη, Ευπραξία
Translated Name
Mavromati, Efpraxia
Alternative Name
Mavromati, E.
Μαυρομάτη, Ε.
Job Title
Μέλος Τομέα Έρευνας και Προστασίας της Βιοποικιλότητας
Main Affiliation
ORCID
19 results
Now showing 1 - 10 of 19
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Item type:Studies - Reports, Does littoral substrate affect macroinvertebrate assemblages in Mediterranean lakes?(2023); ; 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. - Some of the metrics are blocked by yourconsent settings
Item type:Studies - Reports, Report on the application of phytoplankton index NMASRP for reservoirs in Greece(Greek Biotope/Wetland Centre (EKBY), 2016); ; Assessment methods had been intercalibrated for lake types LM 5/7 (deep siliceous reservoirs) and LM 8 (deep calcareous reservoirs) (de Hoyos et al. 2014). In the first round of IC that Greece participated, boundaries for individual phytoplankton metrics (chlorophyll-a, total biovolume, percentage of cyanobacteria, IGA and MedPTI) were agreed (using option 1 of IC) and formally included in the 200 8 EC Intercalibration Decision. During the second round of IC, national assessment methods based on the above metrics (NMASRP for Cyprus and Portugal, MASRP for Spain and NITMET for Italy) were intercalibrated for LM 5/7 and LM 8 types. Greece had not started the operation of the monitoring network at that time, and thus had not submitted its national assessment method for the second round of IC. The operation of the Greek monitoring network started in 2012, following the publication of a Joint Ministerial Decision in 2011. Fifty lake water bodies have been included in the monitoring network, out of which 15 are LM 5/7 and 5 are LM 8 reservoirs. The national phytoplankton assessment method applied for Greek LM 5/7 and LM 8 reservoirs is the New Mediterranean Assessment System for Reservoirs Phytoplankton (NMASRP), that has been intercalibrated in the Med GIG, as applied by Cyprus and Portugal (i.e. the metric percentage of cyanobacteria is replaced by the metric biovolume of cyanobacteria, in order to account for algal blooms) (de Hoyos et al. 2014). Spain uses MASRP (i.e., with the metric percentage of cyanobacteria). NMASRP addresses eutrophication pressure in Mediterranean reservoirs. This report does not discuss the development of new or revised ecological assessment method for phytoplankton according to finalized IC results, but the application of the existing NMASRP phytoplankton assessment method as intercalibrated in the Med GIG (including existing MEP values and EQRs), into the national dataset. NMASRP values are calculated as annual mean. This dataset contains data collected during the 2012-2015 sampling campaign, and in particular 53 NMASRP values for LM 5/7 and 18 NMASRP values for LM 8 reservoirs arising from 139 and 56 samplings, respectively. - Some of the metrics are blocked by yourconsent settings
Item type:Studies - Reports, Report on the development of the national method for the assessment of the ecological status of natural lakes in Greece, using the biological quality element “phytoplankton”(Greek Biotope/Wetland Centre (EKBY), 2017); ; This report discusses the development of a national method for the assessment of ecological status of natural lakes in Greece, based on the Biological Quality Element (BQE) “phytoplankton”; it is a revised version of the 2016 report, following comments by JRC and Intercalibration Review Panel experts. The main changes include an amendment to modNygaard index (exclusion of Centrales, see 2.1), the exclusion of a lake’s data from the reference dataset in order to avoid ircularity in the assessment, and construction of pressure response curves with phytoplankton and TP data from lake years 2014 and 2015. At the Mediterranean Lake Geographical Intercalibration Group, Member States defined two common water body types for reservoirs (L-M5/7 and L-M8). In spite of common efforts, within the Mediterranean GIG, there was no possibility to intercalibrate natural Mediterranean lakes because of the absence of common types with enough lakes. As a result, no assessment methods for phytoplankton of natural lakes have been intercalibrated within the Med GIG. The operation of the Greek water monitoring network started in 2012, following the publication of a Joint Ministerial Decision in 2011 and comprises 23 natural lakes. The development of the current assessment method, as described in this report, is based on the data from this national water monitoring network. Natural lakes in Greece are grouped into 3 types: 1) warm monomictic, deep natural lakes with mean depth >9 m (type GR-DNL, 7 lakes), 2) polymictic, shallow natural lakes with mean depth 3-9 m (type GR-SNL, 8 lakes), 3) very shallow lakes < 3 m (type GR-VSNL, 8 lakes). - Some of the metrics are blocked by yourconsent settings
Item type:Conferences, Hydromorphological features of Greek lakes: First results from the monitoring network(2015); ; ; ; The Water Framework Directive (2000/60/EC) describes the hydromorphological elements as supporting to the biological elements. In Greece, comprehensive long-term studies do not exist for the majority of Greek water bodies (Kagalou & Leonardos, 2009). However, the complex geomorphology of Greece, the uneven distribution of precipitation and differences in demand for irrigation and drinking water at local or regional level (Zacharias 2002, Kagalou & Leonardos, 2009) are some of the characteristics that affect hydromorphological features of Greek lakes. The newly established (JMD 140384/2011) national monitoring network has come to fill in this gap; EKBY now operates the national monitoring network for lakes in Greece. This study aims towards the presentation of the first results of lake hydromorphology monitoring during 2013 and 2014. - Some of the metrics are blocked by yourconsent settings
Item type:Conferences, A brief overview of the monitoring network for lakes in Greece(2014); ; ; ; The Water Framework Directive (WFD) foresees the operation of monitoring programmes for surface waters and groundwater in order to assess their ecological and chemical status (article 8). In Greece the monitoring network according to the requirements of the WFD has been established in late 2011 (Official Gazette 2017/B/ 09.09.2011) and made operational in 2012. The Greek Biotope - Wetland Centre monitors water quality and quantity of lake water bodies. In particular, in situ measurements, sampling and analysis of biological, physico-chemical, and hydromorphological quality elements are undertaken in 24 natural lakes and 26 reservoirs since spring 2012. Fifty three (53) sampling stations have been established, 27 of which correspond to surveillance monitoring programmes and 26 to operational monitoring programmes. This study aims towards i) a brief overview of the national monitoring network of Greek lake water bodies and ii) the presentation of the first results produced during 2012 and 2013. The dataset covers a gradient of eutrophication, which seems to be the main anthropogenic pressure in Greece and the most widespread anthropogenic pressure on lakes across Europe. The current monitoring network provides a useful start in establishing baseline data that will allow the assessment of ecological status and trends of Greek lakes. - Some of the metrics are blocked by yourconsent settings
Item type:Studies - Reports, Report on the development of the national method for the assessment of ecological status of natural lakes in Greece, with the use of littoral benthic invertebrates(Greek Biotope/Wetland Centre (EKBY), 2020); ; ; M. LazaridouThis report discusses the development of a national method for the assessment of ecological status of natural lakes in Greece, based on the Biological Quality Element (BQE) “Benthic Invertabrate Fauna” from the littoral zone, the Hellenic assessment method for Lake Littoral Benthic invertebrate fauna (HeLLBI). Most lake assessment methods based on benthic macroinvertebrates to date, evaluate eutrophication and acidification; fewer methods assess morphological pressures on lake ecosystems and they are mostly based on benthic macroinvertebrates from the littoral zone (Poikane et al., 2016). Greece has a national method for zoobenthos from the profundal zone (GLBiI - Greek Lake Benthic invertebrate Index), that addresses eutrophication, which is included in the 2018 Intercalibration Decision [Commission Decision (EU) 2018/229] (Ntislidou et al., 2018). The development of the current assessment method, as described in this report, is based on data from the national water monitoring network. In particular, 109 littoral sampling sites in 21 lakes (29 lake years) have been surveyed for benthic invertebrates during the 2015-2018 sampling campaign. Natural lakes in Greece are grouped into 3 types, according to the mixing regime and depth gradient1. As the sampling took place in the littoral zone, data from all lake types were pooled in the dataset. The HeLLBI method consists of metrics indicative of taxonomic composition and abundance, sensitivity/tolerance of taxa and taxa diversity. It addresses morphological alteration and eutrophication pressures. - Some of the metrics are blocked by yourconsent settings
Item type:Conferences, Οικολογική Κατάσταση και οι τάσεις της λίμνης Τριχωνίδας: αποτελέσματα του εθνικού δικτύου παρακολούθησης υδάτων». Παρουσίαση στην Συνεδριακή Ημερίδα για την Τριχωνίδα «ΤΡΙΧΩΝΙΔΑ. ΤΟ ΒΙΩΣΙΜΟ ΜΕΛΛΟΝ ΤΗΣ ΠΕΡΙΟΧΗΣ», Αγρίνιο, 18 Μάϊου 2025(2025)Παρουσίαση της οικολογικής Κατάστασης της λίμνης Τριχωνίδας από τα αποτελέσματα του Εθνικού Δικτύου Παρακολούθησης υδάτων. - Some of the metrics are blocked by yourconsent settings
Item type:Conferences, Μελέτη των Characeae σε δύο ολιγότροφες λίμνες: αποτελέσματα του Εθνικού Δικτύου Παρακολούθησης λιμνών(2025); ; 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. - Some of the metrics are blocked by yourconsent settings
Item type:Articles, A new WFD—compliant littoral macroinvertebrate index for monitoring and assessment of Mediterranean lakes (HeLLBI)(2021); ; ; Lazaridou, Mariabenthic 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. Pressureresponse 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. - Some of the metrics are blocked by yourconsent settings
Item type:Conferences, Ecological status and trends of Lake Kastoria: Ten years of Biological Monitoring (Presentation)(2022); ; ; Moschandreou K.Most lakes suffer from degradation in the last decades, causing decline in their water quality, due to anthropogenic pressures. The need to monitor their status and trends, in order to design effective management measures and to reduce those impacts is now being highlighted worldwide. Aim: to assess the ecological status and trends of Lake Kastoria during the ten-year operation of biological monitoring and to present the classification of its ecological status, according to the WFD provisions.