Phytoplankton Characteristics of the Sasyk Reservoir (Ukraine)

摘要

The results of phytoplankton investigation in the Sasyk Reservoir in the summer of 2013-2014 are presented For this period, 160 species (163 infraspecific taxa including nomenclature type of species) from 8 divisions, 13 classes, 27 orders, 44 families, and 92 genera were revealed. The core of the phytoplankton taxonomical structure comprised representatives of Chlorophyta (66 species, 69 infraspecific taxa - 41%), Bacillariophyta (51 species - 32%), Cyanophyta (26 species - 16%), and Euglenophyta (6species - 4%). Divisions Charophyta and Dinophyta contain 4 species, or 2.5% each, Xanthophyta - 2 species, or 1%, Chrysophyta - 1 species, or 1%, were less diverse. Leading genera were Desmodesmus (Chodat) An et al., Navicula Bory, Scenedesmus Meyen, Monoraphidium Komarek-Legn., Microcystis Lemmerm., Lagerheimia Chodat, Tetraedron Kutz., Amphora ex Kiitz., Gomphonema Ehrenb. and Nitzschia Hassall. According to the cluster analysis results, the similarity of phytoplankton species composition on the sampling sites was 68-84%. During the investigation, blue-green algae Aphanocapsa planctonica (G.M. Sm.) Komarek et Anagn., Anagnostidinema amphibium (C. Agardh ex Gomont) Strunecky, Bohunicka, J.R. Johansen et Komarek, Merismopedia warmingiana Lagcrh., M.tenuissima Lemmerm. Microcystis wesenbergii (Komarek) Komarek dominated, testifying the unsatisfactory state of the water body.