Seasonal and interannual dynamics of phytoplankton of the Yenisei River in the area of the Gremyachii Log water-intake facilities

A total of 81 taxa of algae of the rank below the genus of five divisions have been recorded in phytoplankton of the Yenisei River in the area of the Gremyachii Log water-intake facilities. Diatoms dominate in the structure of algocenoses in abundance and biomass. The trophic status of the area, estimated according to the average biomass of phytoplankton 1.92 ± 0.09 mg/L, corresponds to the mesotrophic state; the water quality corresponds to the third class: “satisfactory clean.”