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- Title
华北落叶松和白杄径向生长对 干旱的生态弹性差异.
- Authors
解萍萍; 张博奕; 董一博; 吕鹏程; 杜明超; 张先亮
- Abstract
<span id="ChDivSummary" name="ChDivSummary" class="abstract-text">In order to reveal the responses of radial growth to climatic factors and differences in ecological resilience to drought between the heliophilous species Larix principis-rupprechtii and the shade species Picea meyeri in mixed forests. We developed the tree-ring width chronologies of L. principis-rupprechtii and P. meyeri in three mixed forests based on the samples collected from Toudaogou of Saihanba in Hebei, Ningwu County and Kelan County in Shanxi Province, to analyze the correlation between climatic factors and various chronologies and study the differences in resistance (Rc), recovery (Rt) and resilience (Rs) of L. principis-rupprechtii and P. meyeri in response to drought stress. The results showed that the radial growth of L. principis-rupprechtii and P. meyeri was negatively correlated with the mean and maximum air temperature from May to July in three mixed forests, and was significantly and positively correlated with the Palmer drought index (PDSI) from May to September. Radial growth decline in trees due to drought stress was significantly different between tree species, showing consistency within the three sites, and this difference was reflected in different physiological and ecological regulation strategies between tree species. The resistance of the P. meyeri was stronger than that of L. principis-rupprechtii at three study sites, and L. principis-rupprechtii had stronger resilience and resilient elasticity than the P. meyeri. As a result, P. meyeri exhibited greater drought resistance than L. principis-rupprechtii. Under global warming condition, L. principis-rupprechtii in this region might be at greater risk of growth decline compared with P. meyeri. </span>.
- Subjects
SHANXI Sheng (China); HEBEI Sheng (China); DROUGHTS; MIXED forests; ECOLOGICAL resilience; TREE growth; ATMOSPHERIC temperature; GLOBAL warming
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2023, Vol 34, Issue 7, p1779
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202307.007