Hydrological processes and distribution of hydrobionts in the Rybinsk Reservoir

Litvinov, A.S.

Ergebnisse der Limnologie 1994(40): 45-49


Accession: 008793280

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The differences in the morphometry, morphology and genesis as well as physicochemical parameters of water have a significant effect on aquatic organisms in reservoirs. The concentration of organisms in spots where conditions are more favourable depends on the season, various environmental factors and the behavioral reactions of aquatic animals. In winter time, zooplankton concentrates in the deepest points of hollows of flooded lakes and river channels. In early spring, the qualitative and quantitative differences in the distribution of zooplankton are determined by the intensity of water exchange between different sections of a reservoir, as well as by the hydrophysical and hydrochemical characteristics of winter and spring water masses. In summer and fall, the zooplankton spatial distribution is determined mainly by wind circulation and the structure of water temperature fields.