Influence of Water Mineralization on Zooplankton Productivity in Reservoirs of Akmola Region

Abstract

The effect of water mineralization on zooplankton productivity in the reservoirs of the Akmola region is a very relevant study. The chemical composition of natural waters is inextricably linked to the composition and structure of the soil, which, in turn, was formed during the long evolution of the earth's crust under the influence of climate. Natural waters have a wide variety of qualitative and quantitative chemical composition. The basis for systematization in existing classifications are the amount of mineralization, the predominant component or group, the relationship between different values of concentrations of various ions, the presence of increased amounts of any specific elements of the gas and salt regimes. The relevance of the work is due to insufficient study of the fishing potential of medium-sized reservoirs in Northern Kazakhstan. The work aimed to study the mineralization of water as a factor determining the life of aquatic organisms. As a result of this research, data confirmed the position that the factors that determine the viability of marine organisms are the mineralization of water. To characterize zooplankton across the entire lake area, samples were taken, taking into account different stations. The number of individual organisms in the sample was determined. The degree of mineralization of lakes in the Akmola region was indicated. The correlation coefficient for features in the "mineralization – zooplankton abundance" pair was calculated as r = -0.96, and in the "mineralization – zooplankton biomass" pair r = -0.85. When analyzing the data obtained, it was observed an inverse relationship between water mineralization and zooplankton abundance. When water mineralization increases by 4.03% in July, the number of zooplankton organisms decreases from 170.03 to 152.6 thousand copies/m3. When the salinity of the Uyali - Shalkar lake water increases from 362 (May) to 508 mg/L (July), the zooplankton biomass decreases from 6.02 to 5.73 mg/m3.

Species Diversity of Zooplankton of Small Steppe Lakes of the Northern Part of Kazakhstan

“…Potential indicator species that appear in eutrophic lakes and rise in abundance as eutrophication goes on, include Keratella cochlearis, K. tropica, Brachionus budapestinensis, and B. calyciflorus [30]. In the lakes researched by the authors of the article, Keratella cochlearis dominates in Koyandy water reservoir, which indicates the ongoing eutrophication of this reservoir.…”

Assessment of the Hydrophysical and Hydrochemical Characteristics of Lake Burabay (Akmola Region, North Kazakhstan)

“…The basis for systematization in existing classifications is the degree of mineralization, the predominant component or group, the ratio between different values of concentrations of various ions and increased amounts of certain specific elements of gas and salt regimes [43]. Water mineralization was determined by the total number of ions contained in the natural waters of the lake, including bicarbonates, carbonates, chlorides, sulfates, calcium, magnesium, sodium and potassium [44].…”