Diversity of communities and quantitative parameters of hydrobionts in lakes of the Onon-Toreisk Plain

Abstract

The diversity of communities and the quantitative parameters of hydrobionts of 17 lakes of the Onon-Toreisk Plain in Northeastern Mongolia during the low-water period are analyzed. The organisms revealed in the lakes include 35 species of phytoplankton, 35 species of zoobenthos, 31 species of zooplankton, and 14 species of hydrophytes. Chara virgata, a representative of charophytes, was revealed in Mongolia for the first time. The greatest species diversity of the communities of hydrobionts is seen in oligohaline lakes. The highest quantitative parameters of communities of phytoplankton and zoobenthos are typical for Gurmiin Lake.