Studies of the 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 reach of the Kuibyshev Reservoir 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, some basic hydrochemical and hydrophysical indicators, etc.) were analyzed. The dominant phytoplankton complex consists of blue-green, green volvox, centric diatoms, and dinophytes. The study area is subject to the extremely intense processes of blooming of water due to the mass reproduction of Microcystis, Aphanizomenon, and Anabaena blue-green algae species, and the waters of the studied area during most of the growing season corresponds to the mesosaprobic type and a moderately polluted zone.