The fauna and structure of small mammals’ population inhabiting Uzon volcanic caldera (Kronotsky Nature Reserve, Kamchatka)

About the author:

Alyona Yu. Levykh, Cand. Sci. (Biol.), Associate Professor, Head of the Department of Biology, Geography, and Methods of Teaching, University of Tyumen (Ishim Branch); aljurlev@mail.ru

Abstract:

In July-August 2014-2015, the author kept a record of small mammals in various biotopes of Uzon volcanic caldera, Kronotsky Nature Reserve, Kamchatka. With the help of steel spring trap and catching cylinders, 7 small mammal species of Insectivora and Rodentia orders were registered: Sorex isodon, Sorex camtschaticus, Sorex caecutiens, Sorex daphaenodon; Clethrionomys rutilus, Clethrionomys rufocanus, Microtus oeconomus. It is shown that the dominant part of small mammal population inhabiting typical forest and shrub biotopes of Uzon volcanic caldera is C. rufocanus with subdominant S. isodon and C. rutilus. S. isodon and S. caecutiens types of common shrew species are the main part of small mammal population inhabiting the dwarf arctic birch forests. Sorex camtschaticus, a species endemic to Kamchatka, was caught in wetted inundated biotopes and on the edge of a stone birch forest near a water body. 
The overall number of small mammals in all Uzon volcanic caldera biotopes grew in the period from 2014 to 2015. The small mammal communities under the study are marked by low biodiversity and sustainability indices which define the communities' low stability and vulnerability to the environmental and anthropogenic loads.

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