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Contemporary Problems of Ecology

2003 year, number 3

Spatial Differentiation of the Summer Bird Population in the Russian Altai: Basic Trends and Factors

S. M. TSYBULIN, K. V. TOROPOV, Yu. S. RAVKIN, E. N. BOCHKAREVA, M. A. GRABOVSKY, S. G. LIVANOV, N. P. MALKOV, K. V. GRAZHDAN
Pages: 327–347

Abstract

On the material of summer censuses carried out on routes extending over about 8 000 km, the spatial non-uniformity of bird population in the mountainous Altai region was analyzed. The most pronounced altitudinal-zonal variability of bird communities is characterized by a gradual change of their species and faunistic composition , an increase of the total abundance, biomass and species abundance in the direction from the steppe to the forest zone and  by subsequent continuous diminution as the altitude increases , up to the subnival zone. Provincial differences of uniform ornithocomplexes are manifested much less clearly. Classification of the summer bird population of the Altai and a quantitative estimation of force and commonness of constraint between the spatial non-uniformity of population and the environmental factors have been made.