East Fennoscandian Ecological Corridors and Their Role in the Formation of the Modern Mammal Fauna of the Region

The functioning of ecological corridors as passages to central regions of Eastern Fennoscandia for mammals characterized by population oscillations, high migratory activity, and the consequential dispersal beyond the historical distribution ranges (wild boar, roe deer) is described. Invasions of new species into Eastern Fennoscandia as a result of introductions and natural dispersal (muskrat, American mink, Canadian beaver, racoon dog, white-tailed deer, and sika deer) are described.