Developing policy-relevant river fish monitoring in Greece: Insights from a nation-wide survey
| Autor: | Alcibiades N. Economou, D. Kommatas, E. Oikonomou, Yiannis Kapakos, Stamatis Zogaris, Nicholas Koutsikos, V. Tachos, Y. Chatzinikolaou, Leonidas Vardakas, Sofia Giakoumi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences Fauna Rare species Distribution (economics) 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences lcsh:Aquaculture. Fisheries. Angling Index of biological integrity Water Framework Directive Ecology Evolution Behavior and Systematics Bioassessment 0105 earth and related environmental sciences lcsh:SH1-691 biology Bioassessment freshwater fishes Water Framework Directive Mediterranean rivers biogeographical regionalization business.industry Ecology Mediterranean rivers Environmental resource management biology.organism_classification freshwater fishes Geography Electrofishing Freshwater fish biogeographical regionalization Ordination business |
| Zdroj: | Mediterranean Marine Science; Τόμ. 17 Αρ. 1 (2016); 302-322 Mediterranean Marine Science; Vol. 17 No. 1 (2016); 302-322 Mediterranean Marine Science, Vol 17, Iss 1, Pp 302-322 (2016) |
| ISSN: | 1108-393X 1791-6763 |
| Popis: | A wide-ranging river fish survey was executed in the summer of 2009 as part of the preparatory actions for the establishment of a monitoring programme for the EU Water Framework Directive (WFD). This was the first extensive electrofishing campaign for WFD standardized bioassessment in Greece and the experience and insights gained are used here to provide a review of fish-based assessment conditions and requirements in this country. The survey sampled 85 sites on 25 rivers throughout mainland Greece, collecting 70 species of freshwater fish. Quantitative site-based assemblage data is used for taxonomic and ordination analyses revealing a strong biogeographic regionalization in the distribution of the ichthyofauna. The structural and spatial organisation of the fish fauna through the use of species-level and community-level data analyses is explored in three ecoregions where data was deemed sufficient. Transitions in community taxonomic composition among ecoregions were abrupt and concordant with geographical barriers and reflect the influence of historical biogeographic processes. Community-based analysis revealed a substantial degree of variation in quantitative attributes of the fish assemblages among ecoregions. Key conclusions of this work are: (a) the fish-based bioassessment system must be regionalised to reflect biogeographic variation, (b) high faunal heterogeneity among ecoregions (taxonomic, structural), and to a lower degree among basins, constrain the transferability of bioassessment metrics and indices created for explicit regions to other regional frameworks; (c) faunal depauperation in most of the study areas reduce the utility of functional bioassessment metrics and also limits the utilization of rare species and the applicability of the classical form of the “Index of Biotic Integrity” concept. Recommendations to cope with these problems are discussed. |
| Databáze: | OpenAIRE |
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