CENTRE ON THE PROBLEMS OF ECOLOGY AND PRODUCTIVITY OF FORESTS
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CENTRE ON THE PROBLEMS OF ECOLOGY AND PRODUCTIVITY OF FORESTS |
RUSSIAN ACADEMY OF SCIENCES |
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Parfenova E.I., Tchebakova N.M. Bioclimatic Models of Primary Mountain Forests in Southern Siberia // Forest Science (Lesovedenie). 2009. No 5. P. 34-42 (in Russian). Bioclimatic models of primary forests in mountains of Southern Siberia were developed on the basis of a great pool of the data obtained (2000 descriptions). These models are a series of first- and second-degree multiple regression equations that relate the characteristics of forest stands (composition, stock, quality, and height of forest stand) to the climatic indices of their sites (sum of temperatures of above 5 °C annual amplitude of air temperature, Budyko dryness index). The climate optimum for forest-forming coniferous species in mountains of Southern Siberia was determined: dryness index 0.9-1.1, sum of temperatures of above 5 °C is 1400-1600 °C. Climatic factors are responsible for 55% of the variation in the forest composition and for 65% of the variation in stand quality class and height of individual tree species. The tree height increases with raising the sum of temperatures in the sites. The maximal forest stocks are formed in the sites with a dryness index of less than 1.0, which characterizes sufficient moisture conditions. Bioclimatic models, primary forests, cedar, fir, pine, larch, climatic parameters of habitats |
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