Peculiarities of the Dynamics and Structure of Small Mammal Communities at High Latitudes

Studies of small mammal communities were conducted in Yakutia from 1979 to 2017. It was established that communities of small mammals of the northern sparse forest and especially forest-tundra, where community members are at the limit of their ecological tolerance, have a number of features. Against the background of a decrease in species richness, there is an increasing tendency to monodominance, with periodically alternating dominant species, which, in our opinion, is evidence of adaptations that, to a certain extent, ensure the sustainability of communities.