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Abstract <p>In August 2015–2018, the phytoplankton of 15 reservoirs of the Volga, Kama, Don rivers; the Volga–Don Canal; and the unregulated part of the Lower Volga was studied. A decrease in the species richness, diversity, cell size, total phytoplankton, and phytoflagellate biomass in the Volga–Kama cascade is observed from the upper to the lower reaches of the regulated rivers. This reflects the zonation and hydrological continuity. The proportion of biomass of nonheterocystous cyanobacteria in the reservoirs increases with increasing salinity of their waters. The trophic state of the reservoirs is assessed based on the phytoplankton biomass value.</p>

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Current State of Phytoplankton in the Volga, Kama, Don, and Volga–Don Canal Reservoirs (Summer 2015–2018) under Conditions of a Changing Climate and Continuing Eutrophy

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • L. G. Korneva,
  • V. V. Solovyova,
  • O. S. Makarova

摘要

Abstract

In August 2015–2018, the phytoplankton of 15 reservoirs of the Volga, Kama, Don rivers; the Volga–Don Canal; and the unregulated part of the Lower Volga was studied. A decrease in the species richness, diversity, cell size, total phytoplankton, and phytoflagellate biomass in the Volga–Kama cascade is observed from the upper to the lower reaches of the regulated rivers. This reflects the zonation and hydrological continuity. The proportion of biomass of nonheterocystous cyanobacteria in the reservoirs increases with increasing salinity of their waters. The trophic state of the reservoirs is assessed based on the phytoplankton biomass value.