Macrozoobenthos in saline rivers in the Lake Elton basin: Spatial and temporal dynamics


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Abstract

The data on seasonal and interannual changes in the taxonomic, structural, and quantitative characteristics of macrozoobenthos communities in rivers with a high salinity gradient are given. A total of 91 benthic invertebrate taxa have been revealed, which were dominated by Cricotopus salinophilus, Chironomus salinarius, C. aprilinus, Tanytarsus kharaensis, Microchironomus deribae, Glyptotendipes salinus (Diptera: Chironomidae), Culicoides (M.) riethi, Palpomyia schmidti (Diptera: Ceratopogonidae), Paranais simplex (Oligochaeta), and Ephydra sp. (Ephydridae) in different years. The fauna of benthic communities is mainly represented by eurybiontic halotolerant species with different ranges of resistance to salinity. The taxonomic composition and diversity of macrozoobenthos communities are closely correlated with water salinity in the range from 4 to 41 g/L; the complex of hydrological and hydrophysical factors (depth, overgrowing, water temperature, pH, etc.) control the distribution and abundance of species.

About the authors

T. D. Zinchenko

Institute of Ecology of the Volga River Basin

Author for correspondence.
Email: tdz@mail333.com
Russian Federation, Tolyatti, 445003

L. V. Golovatyuk

Institute of Ecology of the Volga River Basin

Email: tdz@mail333.com
Russian Federation, Tolyatti, 445003

E. V. Abrosimova

Institute of Ecology of the Volga River Basin

Email: tdz@mail333.com
Russian Federation, Tolyatti, 445003

T. V. Popchenko

Institute of Ecology of the Volga River Basin

Email: tdz@mail333.com
Russian Federation, Tolyatti, 445003

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