Landscape chorology of collembola on taimyr peninsula. 1. Biotopic preferences of species [Russian]

摘要

The data of long-term studying the spatial distribution of collembolan species recorded on a latitudinal gradient from the northern taiga up to the polar deserts of Central Siberian sector of the Arctic are analyzed. The majority of Collembola species in the tundra zone is more abundant in various intrazonal. communities, including both hydromorphic plant associations, and sites most supplied with heat. A limited number of the species prefers zonal communities. In other words, there are few tundra species (taking into account their biotopic preferences) in Taimyr tundras. The most specific feature of the Collembola distribution within this Arctic region is its lability manifesting itself in the natural changes of biotopic preference in a particular species along a latitudinal gradient according to the well-known rule of "station changes." The causes of frequent occurrence and a distinct display of the mechanism, smoothing the environmental conditions and permitting the Collembola species to overcome-climatic boundaries in the tundra, are discussed.