Seasonal Dynamics of Planktonic Algae in the Volzhsky Reach of the Kuibyshev Reservoir in 2017

Studies were carried out on the seasonal dynamics of phytoplankton in the Volga r each of the Kuibyshev r eservoir in 2017. At the same time, the seasonal values of the main abiotic environmental factors influencing the dynamics of phytoplankton (level regime, intensity of incident solar radiation, a number of basic hydrochemical and hydrophysical indicators, etc.) were analyzed. The dominant phytoplankton complex consists of blue-green, green volvox, centric diatoms and dinophytes. The studied area is subject to extremely intense processes of “blooming” of water due to the mass reproduction of blue-green algae species Microcystis, Aphanizomenon and Anabaena , and the waters of the studied area during most of the growing season corresponded to the mesosaprobic type and a moderately polluted zone.