Yan Tao, Kang Yaoyao, Xie Siyu, Tao Chun, Li Lianxiang, Li Xuefen, Wang Qiong, Zhang Yun
College of Ecology and Environment (College of Wetlands), Southwest Forestry University, Kunming 650224, China.
Beijing Forestry and Parks Planning and Resource Monitoring Center (Beijing Forestry Carbon and International Cooperation Affairs Center), Beijing 101118, China.
Plants (Basel). 2025 Aug 12;14(16):2508. doi: 10.3390/plants14162508.
Responses of tree radial growth to climate are usually species-specific. Northwestern Yunnan has become a hotspot for the study of dendrochronology due to its sensitivity to climate change and the relative integrity of vegetation preservation. In this paper, we take three dominant conifers-, and -as the research objects and analyze their tree-ring width chronologies in order to reveal the main climate factors affecting tree growth in northwestern Yunnan and to evaluate species-specific variation in climate response. The results showed that the radial growth of the three tree species was co-regulated by temperature and precipitation but that the growth response patterns were varied. Specifically: (1) The radial growth of the three species of conifers was significantly and negatively correlated with the July average maximum temperature () and the October Palmer Drought Severity Index (PDSI) in the current year. (2) Current May precipitation significantly promoted growth and inhibited growth, and a wet July was beneficial for both and growth, while the radial growth of and showed a significant and positive correlation with the August in the current year. (3) The sliding analysis supported the results of the response function by showing stable relationships with climate factors which significantly affected tree growth. Results from redundancy analysis (RDA) and response function analysis were basically consistent, demonstrating that these two methods could complement each other in the understanding of relationships between tree radial growth and climatic factors. This study elucidates the climate-growth relationship of the main tree species in the study area and provides theoretical guidance and scientific evidence for regional forest management.
树木径向生长对气候的响应通常具有物种特异性。滇西北因其对气候变化的敏感性和植被保存的相对完整性，已成为树木年代学研究的热点地区。在本文中，我们以三种优势针叶树——[此处原文缺失三种针叶树具体名称]——为研究对象，分析它们的年轮宽度年表，以揭示影响滇西北树木生长的主要气候因素，并评估气候响应中的物种特异性差异。结果表明，这三种树种的径向生长受温度和降水的共同调节，但生长响应模式各不相同。具体如下：（1）这三种针叶树的径向生长与当年7月平均最高温度（[此处原文缺失具体符号]）和10月帕尔默干旱严重度指数（PDSI）呈显著负相关。（2）当年5月降水显著促进[此处原文缺失具体树种]生长并抑制[此处原文缺失具体树种]生长，7月湿润有利于[此处原文缺失具体树种]和[此处原文缺失具体树种]生长，而[此处原文缺失具体树种]和[此处原文缺失具体树种]的径向生长与当年8月[此处原文缺失具体内容]呈显著正相关。（3）滑动分析通过显示与显著影响树木生长的气候因素的稳定关系，支持了响应函数的结果。冗余分析（RDA）和响应函数分析的结果基本一致，表明这两种方法在理解树木径向生长与气候因素之间的关系时可以相互补充。本研究阐明了研究区域主要树种的气候 - 生长关系，为区域森林管理提供了理论指导和科学依据。
