Landscape Chorology of Springtails in the Taimyr Peninsula: 2. Latitudinal Species Differentiation

摘要

Zonal-landscape distribution of springtails along the latitudinal transect from northern taiga forests to polar deserts of the mid-Siberian sector of the Arctic Region was analyzed. Hyperarctic, euarctic, hemiarctic, and hypoarctic groups of species corresponding to the detailed subdivisions of the category "Arctic species" were distinguished on the basis of relative abundance indices. In the springtail fauna of Taimyr, the fraction of all these species, mainly associated with forestless subarctic landscapes, is rather large (more than 45% of the regional fauna), which is unusual for such a primitive group. The character of latitudinal distribution of springtails in Taimyr is rather similar to that typical of other taxa of terrestrial animals, and all the characters of the zonal-landscape distribution of species described in the literature can be exemplified by springtails.