Effect of environmental factors on the structure and functioning of biocoenoses of hyperhaline water reservoirs in the south of Western Siberia

Based on the perennial monitoring (1995–2010) of hyperhaline water reservoirs in the south of Western Siberia with salinity from 28 to 417 g/L, four seasons in the development of biocoenoses are distinguished and integrated results of studies of the effect of environmental factors on the species composition and productivity of biocoenoses are presented. The decisive role of temperature on the seasonal cycles of hydrocole development and salinity on the productivity and composition of biocoenoses are revealed. The highest species diversity is observed in summer at temperatures above 12°C; the fauna is represented only by artemia cysts at negative temperatures. With an increase of salinity from 28 to 100 g/L the number of species declines. For salinity 100 g/L the fauna is represented only by brine shrimp Artemia . Hyperhaline biocoenoses are the most productive at salinity 150–180 g/L.