SPATIAL-TYPOLOGICAL ORGANIZATION OF BIRD ASSEMBLAGES IN ANTHROPOGENIC HABITATS OF ALTAI-SAYAN MOUNTAIN REGION
Results of bird counts in anthropogenic habitats of Altai-Sayan mountain region were used to create a hierarchical classification of bird population of the region (includes three levels: type, subtype and class). The classification served as a basis for spatial typological structure plot which enabled us to reveal basic trends of bird population variability and to spot the factors corresponding with these trends. The factors and regimes revealed were then separately assessed in terms of their significance values. Finally, we demonstrate the crucial role of build-up areas, their food capacity and natural surroundings as major factors forming bird assemblages of anthropogenic habitats in the region. Despite a significant diversity of natural landscape in the region, provincial effects explain only 12 % of dispersion which is quite close to the percentage for full landscape sample in Ataian part of the region. Several factors, though significant at local scale, don’t add any informative value to the principal scheme of population organization.