Home – Home – Jornals – Geography and Natural Resources 2023 number 5S

We examine the problem of the territorial heterogeneity of bird assemblage in Northern Eurasia within the USSR borders as of 1990. The experience of zoning was discussed as one of the ways to generalize zoogeographic information, a method for its analysis and development of the basis for mapping. Based on cluster analysis results of extensive material, trends in the bird assemblage heterogeneity and the natural-geographical regimes that determine them, that is, the spatial-typological structure and organization of ornithocomplexes, were identified, and the strength and commonality of the relationship between the variability of the environment and bird communities in the first half of summer was assessed. Using a linear qualitative approximation of the similarity matrices (one of the regression analysis methods), the integral information content of the resulting representations was calculated (dispersion of the similarity matrix which is removed by classification and structure, and the multiple coefficient of their correlation). These indicators characterize the significance of the completeness of the explanation of the bird assemblage territorial differences. A bird assemblage map of the study area was compiled. The results of the study are not only of cognitive interest, but also of practical importance. They can be used for environmental purposes and in the process of teaching geographical and biological disciplines. The statistical programs used were developed relatively recently specifically for the analysis of data on the animal assemblage territorial heterogeneity. They have been well tested, showing a high degree of correctness and reliability in the processing of material on terrestrial and aquatic invertebrates and vertebrates as well as on lichens, fungi, and flowering plants. The maps, graphs and assessments of their information content were all made for the study area for the first time.