SAPROBIOLOGICAL ANALYSIS OF THE WATER QUALITY OF SASYK RESERVOIR ARE SHOWN ON THE ORGANISMS OF MACROZOOBENTHOS

Abstract

Invertebrates and their groupings are sensitive indicators of pollution of the
aquatic environment due to its taxonomic diversity, sufficient life cycle and, mainly,
stationary lifestyles. That is, bentonists for a long time are in a particular biotope,
where they directly come into contact with the pollutants, and therefore able to
respond adequately to any environmental changes. In hydroecological studies, such
features give preference to benthic forms in front of other groups of hydrobionts and
allow them to be considered as reliable indicators of water quality not only in the
reservoirs as a whole, but also in individual sections thereof. The saprobiological
characteristics of the water quality of Sasyk reservoir are shown on the organisms of
macrozoobenthos, performed by various methods. A comparative evaluation of the
results obtained. By the methods of Goodnight and Whitley and Pantle-Bukka in the
 Природничий альманах 
25
modification of Sladecek the same saprobity score is obtained: water corresponds to
the β-mesosaprobic zone, which characterizes the reservoir as "moderately polluted".
The average oligochaet index for the water body is 43.05, the saprobity index is 2.45.
The biotic index of Woodivissa was 3.27, indicating a p-α-mesosaprobic level of
contamination and a V-IV grade of water quality. From north to south, there was a
tendency for saprobity to grow both in the open and in the coastal part of the
reservoir. The water area along the eastern shore is cleaner than the western one in
0.15-2.7 times. The saprobity of the Sasyk reservoir water is rely, first of all, by the
volume of organic substances entering from Danube through the Danube-Sasyk
Сhannel, as well as the anthropogenic effect of settlements in the village Borisovka
and Trapovka. At the present stage, according to the results of saprobiological
analysis, there is a decrease in pollution, which indicates a decrease in the amount of
Danube water intake.
Keywords: continental pond, Sasyk, macrozoobenthos, saprobity, water
quality.