Abstract

The data on the degree of overgrowth of the Rybinsk Reservoir and reserves of macrophytes biomass received in 2003 and 2009 are presented. It is shown that, in years with low water levels, vast areas of shallows with thickets of coastal aquatic plants dry up and, therefore, the degree of weediness of the reservoir and reserves of macrophyte biomass within it fall significantly. At a high water level, some of them are flooded, which leads to a significant increase in the degree of weediness of the reservoir. Each time it is higher than the previous peak, which testifies to the pulsating character of the overgrowths and to the general tendency toward a slower reduction of the reservoir area.

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