管涔山华北落叶松径向生长对温度变化的动态响应  

Dynamic response of radial growth of Larix principis-rupprechtii to temperature change in Guancen Mountain

作　　者：王嘉川 李书恒[1,2] 郭伊利 韩宜洁 毛忠雷 WANG Jiachuan;LI Shuheng;GUO Yili;HAN Yijie;MAO Zhonglei(College of Urban and Environmental Sciences,Northwest University,Xi’an 710127,China;Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity,Northwest University,Xi’an 710127,China)

机构地区：[1]西北大学城市与环境学院,西安710127 [2]陕西省地表系统与环境承载力重点实验室,西安710127

出　　处：《生态学杂志》2023年第7期1568-1576,共9页Chinese Journal of Ecology

基　　金：黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG1611);国家林业公益性行业科研专项(201304309);陕西省自然科学基金项目(2014JQ5172)资助。

摘　　要：在气候变暖背景下,升温对不同区域不同树木生长的影响存在差异,干扰森林生态系统的结构与功能。本研究选取管涔山地区优势种华北落叶松(Larix principis-rupprechtii)为对象,建立树轮宽度标准年表,利用Pearson相关分析和滑动分析探讨升温突变前后华北落叶松径向生长与气候因子的响应。结果表明:管涔山地区华北落叶松树轮宽度年表包含丰富的气候信息,适合树木年轮气候学分析。气温突变前后,华北落叶松径向生长与气候因子响应差异显著,气温突变前,华北落叶松径向生长主要受前一年8月和12月最低温、当年11月均温和最高温以及当年3月降水量的制约;气温突变后,华北落叶松径向生长主要受前一年和当年6月最低温、春季各月温度因子、当年10月最高温、前一年6月和当年1月及2月SPEI数值以及当年3月降水量的制约。长时间尺度滑动分析可知,在1993-2008年时间段后,月最高温升高利于华北落叶松生长发育,当年1月和2月树木生长受干旱胁迫。在气候变暖背景下,华北落叶松径向生长与气候变化趋势并未发生分异现象,树木生长弹性有一定的提升,利于扩展生境范围。Under the background of climate warming,temperature rise has different effects on the growth of differ-ent trees in different regions,with consequence on the structure and function of forests.In this study,a standard tree-ring width chronology was established for a dominant species Larix principis-rupprechtii in the Guancen Moun-tain.Pearson correlation analysis and sliding analysis were used to investigate the radial growth and climatic factor responses before and after abrupt warming.Before and after the abrupt change of temperature,the radial growth of L.principis-rupprechtii and its response to climatic factors were significantly different.Before the temperature abrupt change,radial growth of L.principis-rupprechtii was mainly affected by the minimum temperature in August and De-cember of the previous year,the average temperature and maximum temperature in November of the current year,and the precipitation restrictions in March of the current year.After the temperature abrupt change,radial growth of L.principis-rupprechtii was mainly affected by the minimum temperature in June of the previous year and current year,the temperature factors of each month in spring,the maximum temperature in October of the current year,the SPEI value in June of the previous year,January and February of the current year,and the precipitation in March of the current year.The long-term scale sliding analysis showed that after the period of 1993-2008,the increases of the monthly maximum temperature were conducive to the growth and development of L.principis-rupprechtii,the growth of which in January and February of current year was under drought stress.Under the background of climate warming,there was no differentiation between the radial growth of L.principis-rupprechtii and climate change trend,and the tree growth elasticity had been improved to a certain extent,which was conducive to the expansion of its distribution range.

关 键 词：树木气候学 树轮宽度 气候变暖 响应分析 

分 类 号：S791.22[农业科学—林木遗传育种]