M. TISHEVA and D. KOZUHAROV
Sofia University “St. Kliment Ohridski”, Biological Faculty, BG – 1164 Sofia, Bulgaria
Tisheva, M. and D. Kozuharov, 2013. Structure of the zooplankton communities from several water bodies in Natura 2000 zones. Bulg. J. Agric. Sci., Supplement 2, 19: 246–249
Zooplankton community structure in the standing water bodies could be affected by various ecological factors, including water chemistry, Lake typology and human activity in the watersheds. Examination of the zooplankton assemblages of the vulnerable to the human impacts freshwater bodies was conducted during the period June 2009 – June 2012. All of the water bodies in this study are situated in the protected areas of European ecological frame Natura 2000. The research was carried out on one micro reservoir and four swamps. The swamps were overgrown by macrophyte vegetation – over 70%. The studied objects are located in three zones of karstic area in western part of Bulgaria. A whole of 150 plankton components of different taxa ranks (genus, species and subspecies) were identified. There were found 5 new records for Bulgarian Rotifera fauna. The most numerous were Rotifera – 103 taxa. From other zooplankton groups were registered as follow: Protozoa – 15 taxa, Cladocera – 15 taxa and Copepoda – 10 taxa. The zooplankton communities were characterized by a distinct richness of littoral – phytophilous species and a paucity of typical pelagic elements. Most of the registered zooplankton elements indicate the advanced eutrophication process in the studied water bodies.