THE CURRENT STATE OF HYDROBIONTS OF THE AYDAR-ARNASAY SYSTEMS OF LAKES

The material for this article was the results of many years of comprehensive studies of the current state of the biodiversity of aquatic biocenoses (phyto- and zooplankton, periphyton communities and macrophyte associations, zoobenthic organisms and ichthyofauna), the taxonomic structure and species composition of hydrobions in the Aydar-Arnasay system of lakes. During the growing season (winter-autumn) of 2019-2020, from 186 to 224 species and forms of algae were found in phytoplankton samples, where the dominant complex is diatoms, blue-green and green algae. Zooplankton is represented by 67 species, of which Rotifera - 37 species, Copepoda - 17 species, Cladocera - 13 species. Periphyton is represented by three main groups: producers (308 species of forms and varieties of algae), consumers (21 species) and decomposers (8 species), a total of 337 organisms were noted. The ichthyofauna of the lakes is represented by 18 species and subspecies of fish, of which there are 18 species in the East Arnasay Lake, 16 species in the Tuzkan Lake and 14 species in the Aydarkul Lake.

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