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应用生态学报

• 第三届中国树木年轮学术研讨会会议专栏 • 上一篇    下一篇

东北南部蒙古栎径向生长对气候变化的响应——以千山为例

李腾1,2,何兴元1,陈振举1,3,4**   

  1. 1中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室, 沈阳 110164; 2中国科学院大学, 北京 100049; 3沈阳农业大学林学院, 沈阳 110866; 4中国森林生态系统监测网络辽宁辽河平原森林生态系统定位研究站, 辽宁昌图 112500)
  • 出版日期:2014-07-18 发布日期:2014-07-18

Treering growth responses of Mongolian oak (Quercus mongolica) to climate change in southern Northeast: A case study in Qianshan Mountains.

LI Teng1,2, HE Xing-yuan1, CHEN Zhen-ju1,3,4   

  1. (1State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3Forestry College, Shenyang Agricultural University, Shenyang 110866, China; 4Research Station of LiaoheRiver Plain Forest Ecosystem, Chinese Forest Ecosystem Research Network, Changtu 112500 Liaoning, China)
  • Online:2014-07-18 Published:2014-07-18

摘要: 蒙古栎是东北森林中最重要的阔叶树种之一.本研究利用树木年代学方法研究中国东北南部千山地区蒙古栎的径向变化,结合1951—2010年的温度和降水等气象数据,利用相关函数分析了树木生长与气候变化的关系,揭示蒙古栎径向生长对气候响应规律.结果表明:研究区4—7月的降水量与蒙古栎年轮宽度呈显著正相关,是限制该地区蒙古栎径向生长的主要限制因子;5月极端最高温度与蒙古栎年轮宽度呈显著负相关,也是影响蒙古栎生长的关键因素.研究期间,蒙古栎年轮宽度与4月降水量的相关显著且稳定,自20世纪80年代开始蒙古栎径向生长对夏季温度的响应敏感性逐渐减弱,对温度的响应表现出从响应夏季温度向响应春季温度的转变.

Abstract: Mongolian oak is one of the most important broad-leaved tree species in forests, Northeast China. Based on the methodology of dendrochronology, the variations of tree ring radial growth of Mongolian oak in Qianshan Mountains, south of Northeast China, were analyzed. Combined with the temperature and precipitation data from meteorological stations since 1951, the relationships between standardized tree ring width chronology and main climatic factors were analyzed. In this region, the precipitation between April and July of the current year had an  significant relationship with the tree ring width of Mongolian oak, and was the main factor limiting the radial growth. The extreme maximum temperature of May was also a key factor influencing the tree ring width, which had a significant  on the tree ring width of Mongolian oak. The precipitation in April had a significant and stable relationship with  the growth of Mongolian oak since the 1950s. The ‘divergence problem’ was found in the study area, which the sensitivity of tree growth to summer temperature reduced since the 1980s. The tree growth response to temperature showed a seasonal change from summer to spring.