Title: State and Trends of Zooplankton Community in the Coastal Black Sea Ecosystems of Varna and Sevastopol Bays
Citation: Proceedings of the Black Sea Ecosystem 2005 and Beyond vol. 1 p. 743-761
Publisher: Commission on the Protection of the Black Sea Against Pollution
Publication Year: 2008
JRC N°: JRC48300
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC48300
Type: Articles in periodicals and books
Abstract: The paper focuses on the comparison of the zooplankton quality and quantity parameters in two vulnerable coastal areas Sevastopol Bay (Northern Black Sea) and system Varna Bay-Varna Lake- Beloslav Lake (Western Black Sea). The objectives are: 1) to reveal the structure of zooplankton communities in both areas; and 2) to compare the temporal variability of plankton fauna structure in the coastal ecosystems of Northern and Western Black Sea. The numerical abundance of zooplankton of Varna and Beloslav Lakes showed high density during the whole period compared with Varna and Sevastopol Bays. Zooplankton structure demonstrated a similarity in the investigated regions, evident in: the dominance of N. scintillans at the end of the 1980s-early 1990s; increased percentage share of Meroplankton after 1990s till nowadays; similar changes in species diversity (mostly in Copepoda and Cladocera groups). Diversity and evenness indices in average for a year were rather similar for the three regions and varied from 1.99 (in the lakes 1990-1991) to 3.30 (in Varna Bay, 1997). Fairly better was the ecological state of the zooplankton community in Varna and Sevastopol Bays compared to the Lakes. Cluster analysis differentiated between two main groups (Varna Bay and Sevastopol Bay) with 50 % similarity of Bray-Curtis. More faunal similarities appear between coastal areas of the Black Sea compared to the more polluted lakes waters
JRC Directorate:Sustainable Resources

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