Abstract—Preliminary data on the impact of the activity of the Eurasian beaver on the ecosystem biodiversity of small rivers in three steppe areas within the Privolzhskaya Lesostep’ State Nature Reserve in the Khoper River basin were obtained. With zooplankton, amphibians, and fish as examples, it was shown that after beaver-made ponds had appeared, the abundance of all these groups increased. In old ponds, the fish abundance decreased while that of amphibians continued to increase. In drained ponds, the zooplankton and amphibian abundance decreased while fish became more numerous, due to the appearance of better flowage.
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ACKNOWLEDGMENTS
The authors thank Academician Yu.Yu. Dgebuadze for assistance in the preparation of the publication and A.O. Svinin and O.A. Ermakov for assistance in identifying the frogs of the genus Pelophylax.
The field research was supported by the Russian Foundation for Basic Research (project nos. 14-04-31458 mol_a and 16-34-0039 mol_a); the interpretation of the results obtained, the review of the sources, and the preparation of materials for publication were supported by the Russian Science Foundation (project no. 16-14-10323).
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Osipov, V.V., Bashinskiy, I.V. & Podshivalina, V.N. Influence of the Activity of the Eurasian Beaver Castor fiber (Castoridae, Mammalia) on the Ecosystem Biodiversity of Small Rivers in the Forest–Steppe Zone. Biol Bull Russ Acad Sci 45, 1139–1148 (2018). https://doi.org/10.1134/S1062359018100205
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DOI: https://doi.org/10.1134/S1062359018100205