phytoplankton

Studying the development of such an important group as cyanobacteria is an integral part of environmental monitoring of the Volga-Caspian region. Based on long-term data, a comparative description of the current state of the group of cyanobacteria of the Volga-Caspian region is indicated. The degree of similarity of marine and river species of the group of cyanobacteria for sections of the Volga River, Northern and Middle Caspian Sea was determined.

To assess the ecological status of water bodies, phytoplankton development indicators are widely used. The article deals with the use of microalgae in the assessment of water quality using the example of the Barskoye Lake. Collection and processing of hydrobiological material were carried out in the autumn of 2016 by standard methods. Phytoplankton is represented by 76 taxa below the genus belonging to 7 divisions: Chlorophyta (30), Bacillariophyta (16), Cyanophyta/Cyanoprocaryota (12), Euglenorhyta (7), Chrysorhyta (5), Сryptоphyta (3), Dinophyta (3).