Impact of Period of Flooding on Summer Zooplankton of Small Lakes

Abstract

The study shows that the zooplankton of the lake, which annually is connecting with the river, has maximum number of species, the value of the coefficient of nutrient status, abundance, and biomass. Very long period of flooding, as well as the first flooding of mesotrophic-eutrophic sites of reservoirs after several years of lack of connection with a river, cause a restructuring of zooplankton, which is observed under increasing organic income. The first flooding of hypertrophic areas of reservoirs leads to changes in the structure of zooplankton, a number of parameters of the structure of zooplankton indicates the reduction of the organic income. Recovering of mode of flooding in the second year maximally homogenizes conditions of development of zooplankton in floodplain lakes of different types.