TAXONOMIC COMPOSITION AND STRUCTURE OF ZOOPLANKON IN THE WATERS OF THE AKMOLA REGION

Abstract

The article presents the results of the taxonomic composition and structure of zooplankton in the lakes of the Akmola region. The taxonomic composition of zooplankton is presented in Lake Uyaly-Shalkar - 12, Lake Schnet - 7, Lake Shelkar - 6, the Maidan dam - 9 species. In terms of morphometric features, Daphnia longispina is the guiding species from all the lakes studied. According to the production characteristics, the number of individuals in the modal and near-modal classes for theoretical calculations was 82.4%, for empirical –– 70%, this indicates that this guideline is in equilibrium states. The largest total average seasonal biomass of zooplankton in the studied lakes was observed in May (5.02– 6.02 g / m 3 ), while oligochaetes dominate in the average seasonal biomass of benthos in lakes, from 45.2 to 48.5% of the specific biomass, with their total biomass varies from 8.61 to 8.98 g / m 2 . During the classification of lakes by trophicity (fodder), it was found that the lakes Uyaly-Shalkar and Shnet are eutrophic, the Maidan dam and the Shelkar are mesotrophic lakes.