Release:2017, Vol. 3. №4
About the authors:Olga E. Tokar, Cand. Sci. (Biol.), Associate Professor, Department of Biology, Geography and Teaching Methods, P. P. Ershov Ishim Pedagogical Institute (University of Tyumen Branch); email@example.com
This article provides the results of hydroecological investigations of the Lake Travnoye (The Tyumen Region, Ishim District) performed in 2011, 2013, 2015, and 2016. The authors analyze the content and structure of the key biotic elements of the hydoecosystem. Based on this analysis, the water of the Lake Travnoye is determined to be fresh, highly mineralized, moderately hard, and moderately alkaline. In terms of ammonium pollution, the lake is a beta-mesosaprobic environment (a mesotrophic level); in terms of nitrates pollution — xenosaprobic (a hypotrophic level); in terms of polyphosphates pollution — hypersaprobic (a hypertrophic level); in terms of organic pollution — polysaprobic (polluted; a hypertrophic level). The indicators of hydromacrophytes, macroinvertebrates, golden carp population (Carassius auratus, Bloch, 1782) suggest a high level of organic pollution and a low quality of aquatic habitat. The results of bioindicator research are corroborated by the direct hydrochemical analysis.