Index of abundance for some species of small mammals typical for the Paleoarctic in the Smolensk region
The indicators of the abundance index for ten species of small mammals living in the ecosystems of the mixed forest on the territory of the Smolensk region, located within the Paleoarctic subkingdom, the European-Siberian region, were investigated. Significant differences were found in the frequency of occurrence for different species of small mammals. Conclusions are made about the possible reasons for the species abundance index.