The Ecological Status of the South-Eastern Part of the Sivash Gulf (the Azov Sea) in Salinity Change Conditions
O. V. SOLOVEVA1, E. A. TIKHONOVA1, S. V. ALYOMOV1, N. V. BURDIYAN1, T. V. VITER1, E. V. GUSEVA1, E. A. KOTELYANETS2, T. A. BOGDANOVA1
1A. O. Kovalevsky Institute of Marine Biological Research of RAS, 299011, Sevastopol, Nakhimov ave. 2
2Marine Hydrophisical Institute of RAS, 299011, Sevastopol, Kapitanskaya str. 2
Keywords: залив Сиваш, физико-химические показатели, биогеоценоз, макрозообентос, мейобентос, бактерии, тяжелые металлы, Sivash Gulf, physico-chemical indicators, biogeocenosis, macrozoobenthos, meiobenthos, bacteria, heavy metals
Abstract
The estimation of the current ecological state of the Sivash Gulf (the southern part of the Eastern Sivash) was conducted in the conditions of its water regime changes. According to the obtained concentrations of the main pollutants classes, the prevailing type of anthropogenic impact on the ecosystem state of the investigated water area is a reduction in the freshwater runoff. It caused a rise in the salinity of the water. The quantitative indices of the microbial community of sea bottom sediments of the bay characterize their contamination by organic substances. The increase of salinity in the basin caused restructuring of the bottom community main components. Meyo- and macrozoobenthos manifested decrease in biodiversity indicators and change in the taxonomic structure of the biocenosis.
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