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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V. E. Ben'kova, A. V. Shashkin, M. M. Naurzbaev, A. S. Prokushkin, V. V. Siman'ko The Importance of Microecological Conditions for Growth of Larix gmelinii at the Timberline on Taimyr Peninsula // Forest Science (Lesovedenie). 2012. No 5. С.59-70. The influence of microecological conditions on the dynamics of еру radial increment of Larix gmelinii along a topographic-ecological profile located in the middle reach of the Kotui River at the timberline (sparse forest-tundra) was studied on Taimyr Peninsula (70°52'53'' N, 102°58'26'' E). Biometric characteristics and width of annual rings trees were obtained on three sample plots in the upper, middle, and lower parts of the profile. Physicochemical and hydrothermal properties of the soils were also studied. The analysis of correlation between the chronologies based on tree rings and slipping 20 day mean values of air temperature and precipitation showed that in the upper part of the profile at the timberline, a response of trees to air temperature was manifested 10 days later than in the lower part. The higher intensity of the radial increment and biometric characteristics of larch trees at the timberline (sparse forest-tundra) are suggested to be determined by the favorable hydrothermal properties of the soils. The results obtained support the concept that at the timberline (sparse forest - tundra) on Taimyr Peninsula, there are relatively favorable conditions for the growth of larch irrelative of changes in the climate. Dendroecology, long-term permafrost, ecotone of tree line, larch, radial increment, climatic factors, hydro-thermic properties of soils.. |
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