Long-term dynamics of the red-backed vole Clethrionomys rufocanus numbers (Microtinae, Rodentia) in different parts of its range [Russian]

摘要

A comparative analysis of the data on the 25-year dynamics of redbacked vole numbers obtained in three points of its range was conducted. These points are as follows: (1) the Lapland Reserve, Kola Peninsula (northern part of the range); (2) Siberian station - Western Siberia, foothills of the Salair and Kuznetskii Alatau; (3) the Far Eastern station - the southern Russian Far East, southwestern foothills of the Sikhote Alin. The fluctuations in the number of voles are shown to be not synchronous in different parts of the area. The main factors responsible for the dynamics of the number are different in the points studied. At the Lapland Reserve, the number of voles is maximal and controlled by few functional factors (affecting in the year of registration or in the previous year), whereas a number of "retro" factors (affecting in preceding years) are of greater importance. At the Siberian station, the number of voles is related to the greatest number of functional factors. At the Far Eastern station, the pattern of the dynamics is intermediate. At the Lapland Reserve, short-term (high-frequent) cycles predominate in the temporal dynamics of the animal populations. In other points, cycles with medium periods (low frequent) occupy a significant part of the curve describing the dynamics of the voles' number.