升温对祁连山东部青海云杉径向生长的影响

doi:10.13287/j.1001-9332.202110.019

应用生态学报 ›› 2021, Vol. 32 ›› Issue (10): 3576-3584.doi: 10.13287/j.1001-9332.202110.019

升温对祁连山东部青海云杉径向生长的影响

刘兰娅^1,2, 勾晓华^1,2*, 张芬^1,2, 尹定财^1,2, 王学佳³, 夏敬清^1,2, 李芊^1,2, 杜苗苗^1,2

¹兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州 730000;
²兰州大学甘肃连城森林生态系统野外科学观测研究站, 兰州 730333;
³中国科学院西北生态环境资源研究院, 兰州 730000

收稿日期:2021-04-16 修回日期:2021-07-28 出版日期:2021-10-15 发布日期:2022-04-15
通讯作者: * E-mail: xhgou@lzu.edu.cn
作者简介:刘兰娅, 女, 1997年生, 硕士研究生。主要从事气候变化研究。E-mail: liuly19@lzu.edu.cn
基金资助:
国家自然科学基金项目(41771046,41790422)、111项目(BP2018001)和甘肃省创新基地和人才计划-省野外观测研究站项目(18JR2RA011)资助

Effects of warming on radial growth of Picea crassifolia in the eastern Qilian Mountains, China

LIU Lan-ya^1,2, GOU Xiao-hua^1,2*, ZHANG Fen^1,2, YIN Ding-cai^1,2, WANG Xue-jia³, XIA Jing-qing^1,2, LI Qian^1,2, DU Miao-miao^1,2

¹Ministry of Education Key Laboratory of Western China's Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;
²Gansu Liancheng Forest Ecosystem Field Observation and Research Station, Lanzhou University, Lanzhou 730333, China;
³Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2021-04-16 Revised:2021-07-28 Online:2021-10-15 Published:2022-04-15
Contact: * E-mail: xhgou@lzu.edu.cn
Supported by:
National Natural Science Foundation of China (41771046,41790422), the 111 Project (BP2018001), and the Gansu Provincial Innovation Base and Talent Plan-Provincial Field Observation and Research Station Project (18JR2RA011).

摘要/Abstract

摘要： 在祁连山东部西营河流域不同海拔采集年轮样品,利用树木年代学方法建立高海拔(3000 m)、中海拔(2750 m)、低海拔(2500 m)青海云杉标准化年表,将年轮宽度指数与不同时段气温和降水分别进行相关分析,研究祁连山东部不同海拔青海云杉径向生长对气候变暖的响应。结果表明: 水热是祁连山东部青海云杉径向生长的主要限制因子,不同海拔树木的生长限制因子基本一致。在显著升温之前(1961—1986年),低、中、高海拔3个样点的青海云杉径向生长均与上一年7—8月和当年8月平均最高温呈显著负相关,与当年6月相对湿度呈显著正相关。显著升温之后(1986—2014年),高、中、低海拔树木生长与气温仍呈显著负相关,而与当年2月的相对湿度由升温前的不显著负相关转为显著正相关,与6月降水和相对湿度由升温前的显著正相关转为不显著的负相关。升温导致祁连山东部各海拔青海云杉树轮生长变慢,其中高海拔所受影响最大。气候变暖导致的干旱胁迫可能是青海云杉径向生长发生变化的主要原因。

关键词: 祁连山, 青海云杉, 树木年轮, 气候变暖, 海拔

Abstract: Tree-rings of Picea crassifolia from high (3000 m), middle (2750 m) and low (2500 m) altitudes were collected from the Xiying River basin in the eastern Qilian Mountains, with the standard chronology being established using dendrochronological methods. Results of the correlation analysis between tree-ring width index and temperature and precipitation during different periods showed that radial growth of P. crassifolia at different altitudes responded differently to climate warming in the eastern Qilian Mountains. Water and heat availability were the main limiting factors for the radial growth of P. crassifolia in the eastern part of Qilian Mountains. The growth limiting factors at different altitudes were generally the same. Before the prominent warming (1961-1986), radial growth of P. crassifolia at the three sampling altitudes was significantly negatively correlated with mean maximum temperature in July-August of the previous year and August of the current year, and significantly positively correlated with the relative humidity in June of the current year. After the prominent warming period (1986-2014), tree growth at high, middle, and low altitudes remained significantly negatively correlated with air temperature, changed from non-significantly negative to significantly positive correlation with relative humidity in February of the current year, and changed from significantly positive to non-significantly negative correlation with precipitation and relative humidity in June. Warming caused a slowing growth of P. crassifolia tree-ring at all altitudes, with the highest altitude being the most sensitive. Drought stress caused by climate warming might be the main reason for the changes of radial growth of P. crassifolia.

Key words: Qilian Mountains, Picea crassifolia, tree ring, climate warming, altitude

刘兰娅, 勾晓华, 张芬, 尹定财, 王学佳, 夏敬清, 李芊, 杜苗苗. 升温对祁连山东部青海云杉径向生长的影响[J]. 应用生态学报, 2021, 32(10): 3576-3584.

LIU Lan-ya, GOU Xiao-hua, ZHANG Fen, YIN Ding-cai, WANG Xue-jia, XIA Jing-qing, LI Qian, DU Miao-miao. Effects of warming on radial growth of Picea crassifolia in the eastern Qilian Mountains, China[J]. Chinese Journal of Applied Ecology, 2021, 32(10): 3576-3584.

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升温对祁连山东部青海云杉径向生长的影响

Effects of warming on radial growth of Picea crassifolia in the eastern Qilian Mountains, China

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