ASSESSMENT OF WATER QUALITY IN KAPSHAGAI RESER-VOIR BY STRUCTURAL INDICATORS OF PHYTOPLANKTON

Abstract

The structure of phytoplankton is the most representative indicator of the state of aquatic ecosystems, and is widely used in the biomonitoring system. This article provides an assessment of water quality by structural indicators of phytoplankton. Analysis of the floral composition of the algoflora of the Kapshagai reservoir revealed that the species diversity of algoflora in them is determined by diatoms, green, blue-green, golden and pyrophyte algae, which make up 54 species. Diatoms and green algae were characterized by the largest number of species. According to the Simpson dominance index, the phytoplankton of the reservoir is characterized by the leadership of diatoms and blue-green algae. The conducted assessment of water quality using indicator organisms indicates that the reservoir belongs to mesosaprobny type reservoirs. The average values of the saprobity index of water in the reservoir varied from 1.7 (spring) to 1.6 (summer), which allowed us to conclude that the surveyed areas of the reservoir were moderately polluted.