Variability of Radial Growth and Оґ13C in Tree Rings of Deciduous and Coniferous Species in Relation to Climate and the Use of Reserve Assimilates
M. V. Bryukhanova1, E. A. Vaganov2, C. Wirth3
1 V. N. Sukachev Institute of Forest SB RAS
2 FGAOU VPO Siberian Federal University
3 Max-Planck Institute for Biogeochemistry
mbryukhanova@mail.ru
Keywords: Picea obovata L., Pinus sylvestris L., Populus tremula L., Betula pubescens Ehrh., Middle Siberia, tree ring, carbon isotope composition, climatic factors
Pages: 171-179
Abstract
We investigated the variability of tree-ring growth and δ13C variations in Picea obovata L., Pinus sylvestris L., Populus tremula L., Betula pubescens Ehrh. tree rings, and anаlyzed the influence of climatic variables and reserve assimilates on these parameters. The correlation of tree ring width of studied species with climatic factors for the common time series shows both temperature and precipitation influence annual variability of tree ring width. Correlation coefficients of tree ring width for all species with climatic parameters indicate that annual variability of tree growth is mainly determined by June temperature. In addition to tree-ring structure, carbon isotope data provide important detailed information about the relations between tree growth and environment. Seasonal and inter-annual dynamics 13C has the same changes for all studied species and indicates the use of reserve assimilates. Tree ring carbon isotope composition could help to explain the assimilate redistribution process throughout the year and to determine the dependence of the radial growth on weather conditions.
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