Response of tree-ring growth to climate at treeline ecotones in the Qilian Mountains, northwestern China

被引:2
|
作者
He, ZhiBin [1 ]
Zhao, WenZhi [1 ]
Zhang, LiJie [2 ]
Liu, Hu [1 ]
Tang, ZhenXing [1 ]
机构
[1] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Heihe Key Lab Ecohydrol & Integrated River Basin, Chinese Ecosystem Res Network,Linze Inland River, Lanzhou 730000, Gansu, Peoples R China
[2] Univ Wuzhou, Wuzhou 543002, Guangxi, Peoples R China
来源
SCIENCES IN COLD AND ARID REGIONS | 2011年 / 3卷 / 02期
基金
中国国家自然科学基金;
关键词
Qilian Mountains; treeline ecotones; climate; tree-ring growth;
D O I
10.3724/SP.J.1226.2011.00103
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Climate constitutes the main limiting factor for tree-ring growth in high-elevation forests, and the relationship between tree-ring growth and climate is complex. Based on tree-ring chronology and meteorological data, the influence of precipitation, mean temperature and mean minimum temperature at yearly, seasonal and monthly scales on the tree-ring growth of Picea crossifolia was studied at treeline ecotones in the Qilian Mountains, northwestern China. The results show that growing season temperatures of previous and current years are important limiting factors on tree-ring growth, particularly June mean temperature and mean minimum temperature of current year. The precipitations in the previous winter and current spring have a positive correlation, and in the current fall has a negative correlation with tree-ring growth, but these correlations are not significant. Our results suggest that temperature controls tree-ring growth more strongly than precipitation at treeline ecotones in the Qilian Mountains.
引用
收藏
页码:103 / 109
页数:7
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