Addition to the Diatom Flora of Reservoirs of the Chelyabinsk Region

For the first time diatom algae in phytoplankton of the Argazinsky Reservoir, lakes Arakul, Elovoye, Irtyash, Itkul, B. Kasli, Kirety, B. Kisegach, Sinara, Sungul, and Silach are studied using electron microscopy. Data on the species composition of the diatom flora in waters of Chelyabinsk oblast (79 taxa) are significantly updated. In total, 168 species and intraspecific taxa from 55 genera, including 9 new for the flora of Russia and 26 algae identified only at the genus level, were found in the water bodies under study. According to the generalized literature, databases and own data, the highest taxonomic diversity of diatom algae is recorded in lakes Silach (174), Bolshoi Kisegach (159) and Sinara (146).