Climatic response of thick leaf spruce (Picea crassifolia) tree-ring width at different elevations over Qilian Mountains, northwestern China
Climatic response of thick leaf spruce (Picea crassifolia) tree-ring width at different elevations over Qilian Mountains, northwestern China
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DOI：
10.1016/j.jaridenv.2004.09.011
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发表时间：
2005-06-01
影响因子：
2.7
通讯作者：
Jin, L
中科院分区：
文献类型：
--
作者：
Gou, X;Chen, F;Jin, L
Tree-ring cores of thick leaf spruce (Picea crass folia) taken from four sites at different elevations, in the middle of the Qilian Mountains, in the and and semi-arid region of northwestern China, were used to develop four tree-ring width chronologies using standard dendrochronological methods. Results indicate that with increasing altitude the chronologies' year-to-year variations decreased. Hence, the sensitivity of the tree-ring chronologies to climate decreases with altitude. Further analysis showed that the significant limiting factor on tree growth is spring precipitation. Measurements of stomata density and leaf dry weight suggest the species' ecological adaptation strategy changes with elevation. At high elevation the metabolic rate of thick leaf spruce decreases, thus showing the effect of the climate. (c) 2004 Elsevier Ltd. All rights reserved.
