Ecological peculiarities of settlements of beaver ordinary (Castor fiber Linnaeus, 1758) on urban territory of samara region of Russia (on the example of rivers Kondurcha and Sok)

Urbanization is causing the influence to the population of beaver, changes of ecological parameters of population are occurring. On the studied urban territory a number of settlements and channel settlement density is less than on adjacent natural forest territory. In settlements of beaver there are typical for region species of trees and shrub vegetation, main feed species are representatives of genus willow (Salix) mainly with trunk diameter less than 6 centimeters and maple (Acernegundo L.).