STRUCTURAL AND TEMPORAL ORGANIZATION OF THE RODENT COMMUNITYOF THE MIDDLE DARK CONIFEROUS FORESTS OF EASTERN SAYAN(FOR EXAMPLE, RESERVE «STOLBY»)

Analysis of the size and characteristics of community information ofsmall rodents dark coniferous forests Reserve «Stolby» has shown that it is subject tolong-term changes and different average degree of stability, as evidenced by the dynamicparameters of diversity and equalization. Phases of the long-term fluctuations of differenttypes of numbers do not match, in connection with which changes the structure of dominationannual community. This parameter is formed by sharp fluctuations in the numberof dominant species and their rearrangement within the community. Significant influenceon the informational characteristics of small rodent community also has a presence orloss of small species. The method of principal component analysis yielded a threedimensionalmodel of the location of rodents in the hyperspace of the leading environmentalfactors. In the first place of attachment to the main habitat types in the directionof closed and wet - to the sparse and dry. Secondary factors appear fluctuations in thenumber and ratio of the character of moisture. Component analysis of the matrix ofstructural indices showed the lead-dominant species (Cletrionomys rutilus Pall., Cletrionomysrufocanus Pall.) in the structure of domination community for 24 years. Calculationof correlation coefficients between the multi-year performance numbers made itpossible: to establish the presence or absence of numerically dependent relationships betweenspecies, indirectly assess the degree of overlap of ecological niches, determine thedegree of connectedness of community and its overall stability. In general, the analysisallows a high degree of confidence to judge the state as separate populations, and the entirecommunity of small rodents in the territory under consideration and describes him asstable and resistant to the action of factors of different nature.

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