Yu Jian, Chen Jia-Jia, Meng Sheng-Wang, Zhou Hua, Zhou Guang, Gao Lu-Shuang, Wang Yong-Ping, Liu Qi-Jing
School of Landscape Architecture, Jiangsu Vocational College of Agriculture and Forestry, Jurong 212400, Jiangsu, China.
College of Forestry, Beijing Forestry University, Beijing 100083, China.
Ying Yong Sheng Tai Xue Bao. 2021 Jan;32(1):46-56. doi: 10.13287/j.1001-9332.202101.004.
Changbai Mountain is a typical distribution area of temperate coniferous and broad-leaved mixed forests, with significant influence of global climate change. In order to understand the responses of forest ecosystem to climate change, we examined the responses of dominant arbor species in the community ecotone of broad-leaved Korean pine forest and spruce-fir forest (also known as dark coniferous forest), and . The standard chronologies were established by obtaining tree ring width data in order to identity the key climatic factors that confine the radial growth of both species. The responses of and to climate factors were different.. was more sensitive than , indicating that . was more suitable for dendroclimatological analysis. The radial growth of . was consistent with the increases of mean temperature, while the radial growth of . showed a "divergence problem" which decreased with the increases of mean temperature. The radial growth of . was mainly limited by temperature, especially the mean temperature in last July and August and current September. However, there was a negative correlation between standard chronologies of . and mean temperature in most months, which was limited by both temperature and precipitation. The correlation between radial growth of both species and climate factors after sudden temperature rise, was weaker than that before sudden temperature rise. The correlation between radial growth and climate factors changed from positive to negative in some months. Current temperature rise might not exceed the critical threshold of the radial growth of . , which could promote the radial growth. In addition, the wavelet analysis showed that the radial growth of trees in this area might be affected by large-scale coupling effects of atmospheric-ocean-land changes. In conclusion, climate warming was beneficial to the radial growth of . , while drought stress caused by warming was the main factor limiting the radial growth of . . If the global temperature continues to increase in the future, it will have an adverse impact on . . The results would help improve our understanding of the responses of radial growth of . and . to future climate change, and provide some basic data for climate reconstruction using both species.
长白山是温带针叶与阔叶混交林的典型分布区，受全球气候变化影响显著。为了解森林生态系统对气候变化的响应，我们研究了阔叶红松林与云冷杉林（又称暗针叶林）群落交错带优势乔木树种的响应。通过获取树木年轮宽度数据建立标准年表，以确定限制两种树种径向生长的关键气候因子。两种树种对气候因子的响应不同。[树种一]比[树种二]更敏感，表明[树种一]更适合进行树木年轮气候学分析。[树种一]的径向生长与平均温度升高一致，而[树种二]的径向生长出现“分歧问题”，随平均温度升高而下降。[树种一]的径向生长主要受温度限制，尤其是上一年7月、8月及当年9月的平均温度。然而，[树种二]的标准年表与多数月份的平均温度呈负相关，其生长受温度和降水共同限制。两种树种径向生长与气候因子在气温突然升高后的相关性，比气温突然升高前弱。在某些月份，径向生长与气候因子的相关性由正变负。当前气温升高可能未超过[树种一]径向生长的临界阈值，这可能促进其径向生长。此外，小波分析表明该地区树木的径向生长可能受大气 - 海洋 - 陆地变化的大规模耦合效应影响。总之，气候变暖有利于[树种一]的径向生长，而变暖导致的干旱胁迫是限制[树种二]径向生长的主要因素。如果未来全球气温持续升高，将对[树种二]产生不利影响。研究结果有助于增进我们对[树种一]和[树种二]径向生长对未来气候变化响应的理解，并为利用这两种树种进行气候重建提供一些基础数据。
