Structural indicators and toxic species of cyanobacteria of Pskov Lake

The cyanobacterial communities of Lake Pskov were studied in several seasons 2021, and a comparison was made with the data earlier studies. Data on taxonomic composition quantitative characteristics cyanobacteria have been obtained, some species toxic to living organisms are shown. 196 taxa phytoplankton total recorded at four permanent stations lake, 15.8% which cyanobacteria. most similar terms specific summer autumn. Some indicators cyanobacteria, such as their abundance biomass, minimal maximal spring summer–autumn, respectively. Toxic potentially belonging genera Anabaena, Aphanizomenon, Lyngbya, Microcystis, Nodularia, Nostoc present among detected each year. contribution representatives these varied from 4.0% 65.0% In summer, share above number microalgae accounted for ~40.0%. greatest role noted algae Microcystis aeruginosa (Kützing) Kützing, causes “blooming” reservoirs also produces toxin microcystin hepatotoxicity. Any study requires constant monitoring content cyanotoxins, especially autumn, when maximum biomass including species, is observed, may lead serious consequences.