Radial Growth Dynamics of Scots Pine (Pinus sylvestris L.) as an Indicator of the Hydrothermal Regime of the Western Transbaikalia Forest-Steppe
A. V. DEMINA1, L. V. BELOKOPYTOVA1, S. G. ANDREEV2, T. V. KOSTYAKOVA1, E. A. BABUSHKINA1
1Khakasia Technical Institute, 655017, Abakan, Shchetinkinа str., 27
2Baikal Institute of Nature Management, 670047, Ulan-Ude, Sakhyanova str., 6
Keywords: радиальный прирост, сосна обыкновенная (Pinus sylvestris), температура, осадки, гидротермический коэффициент Селянинова, Западное Забайкалье, лесостепь, radial growth, Scots pine (Pinus sylvestris), temperature, precipitation, Selyaninov hydrothermal coefficient, Western Transbaikalia, forest-steppe
Abstract
Radial growth of the Scots pine growing in the forest-steppe zone of Western Transbaikalia on five sites was studied. For each site additional samples were collected, which allowed to increase reliability and build two regional chronologies. The analysis of correlations between chronology and such factors as monthly temperatures, precipitation and Selyaninov hydrothermal coefficient was performed. The analysis of a 10-day moving climatic series made it possible to clarify the periods of climate impact on growth: the basic limitation of pine growth in the region was observed by moisture availability, including conditions during the previous (from late July to late September) and current (May-mid-July) vegetative season. Also fluctuations of 23-35 years in the dynamics of climatic factors and radial growth of the pine were revealed.
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