Abstracts

Diversity of the Fauna

The report is written by the materials, collected in the data bank of IS&EA SB RAS. The estimation of strength and commonness of environmental heterogeneity with variability of communities of amphibians, birds, and micromammals of West-Siberian plain by the energy of their existence is conducted. The most significant is zonality (26% of the accounted dispersion of the matrix of similarity coefficients). Just the same is the constraint with such closely correlated factors as forest cover and forest tree species composition (25 and 22%) and some lesser – with wetting and water surface area (16%). The other factors are not so significant. The multitude estimation of constraint is 57% of dispersion, for the account of correlation between separate factors. The informativeness of regime (structural and classificational) representations is 39 and 44%, and all the factors and regimes explain 59% of dispersion in similarity coefficients (the coefficient of multitude correlation is 0.77). The same hierarchy of factors conserves by the abundance of animals, but the informativeness of constraint is lower. As a whole, by all the factors, on the animal numbers the informativeness decreased just in 1.5 times, and by all the factors and regimes together it decreased on 9%. So, the spatial alterations of vertebrate communities more coincide with landscape heterogeneity of the territory, by the energetic of animals, than by their abundance. The informativeness of interpretation of communities’ heterogeneity in three animal groups together is lower, than separately of birds and micromammals, but is higher than of amphibians. It is connected with a large number of under yearling amphibians near the basins with successful reproduction, what cannot be explained by the landscape characteristics of the environment. Besides that, mathematical indetermination of similarity estimation in zero variants of amphibian communities leads up to the decrease of estimation of strength and commonness of constraint of environments and amphibian communities. Spatio-typological classifications of vertebrate communities by their abundance and the amount of transformed energy are similar, but in the last case the adjusting has the more common character and more corresponds with general geographical lawfulness. In spite of the similarity of compositions in structural-forming factors of environment, the borders of classificational taxons don’t coincide in different groups of animals and also with the landscape and geobotanical division. Under it, there is more of landscape and geobotanical zones on the West-Siberian plain, than the number of supertype groups (in the rank of zone) at the vertebrate animals. The borders between the supertype groups in amphibians are spreading much more to the north, than in the small mammals and especially in birds. It is connected with the more dispersion of tundra and forest-tundra birds to the south, to compare with small mammals. There is no such species among amphibians at all. The investigations, which made a basis for this publication, are supported by RFFI.

Note. Abstracts are published in author's edition

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