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生态学杂志 ›› 2021, Vol. 40 ›› Issue (5): 1275-1284.doi: 10.13292/j.1000-4890.202105.021

• 研究报告 • 上一篇    下一篇

新疆阿尔泰山不同海拔西伯利亚落叶松径向生长对气候变化的响应稳定性评价

薛儒鸿1,2,焦亮1,2*,刘小萍2,陈可2   

  1. 1中国气象局乌鲁木齐沙漠气象研究所, 中国气象局树木年轮理化研究重点开放实验室, 乌鲁木齐 830002; 2 西北师范大学地理与环境科学学院, 兰州 730070)
  • 出版日期:2021-05-10 发布日期:2021-05-07

Evaluation of the stability of the radial growth of Larix sibirica at different altitudes in response to climate change in Altai Mountains, Xinjiang.

XUE Ru-hong1,2, JIAO Liang1,2*, LIU Xiao-ping2, CHEN Ke2   

  1. (1Key Laboratory of Treering Physical and Chemical Research of China Meteorological Administration, Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China; 2College of Geography and Environmental Science, Northeast Normal University, Lanzhou 730070, China).
  • Online:2021-05-10 Published:2021-05-07

摘要: 随着全球变暖加剧,北半球高纬度和高海拔地区树木径向生长对气候变化产生了明显的不稳定、非线性分异响应的现象。在西北地区,阿尔泰山不同海拔优势针叶树种对气候因子响应的稳定性也存在不确定性。以阿尔泰山中段的高、中、低海拔西伯利亚落叶松(Larix sibirica)为研究对象,分析了3条树木年轮宽度序列年表的特征以及树木径向生长气候的动态关系。结果表明:高海拔西伯利亚落叶松径向生长主要受到当年4、6、7月气温(包括平均温,平均最低温和平均最高温)影响;中海拔西伯利亚落叶松径向生长主要受到当年生长季5月平均温、平均最高温和6月均温、平均最低温,以及1月、3月降水制约;而低海拔西伯利亚落叶松径向生长主要受到当年10月降水的限制。在时间稳定性上,高海拔西伯利亚落叶松对生长季温度因子响应逐渐减弱,而中、低海拔西伯利亚落叶松受到降水的制约作用逐渐加强。本研究结果为阿尔泰山不同海拔西伯利亚落叶松管护提供科学支持。

关键词: 树轮生态学, 响应稳定性, 气候变化, 西伯利亚落叶松, 阿尔泰山

Abstract: The radial growth of trees in high-latitude and high-altitude regions of the northern hemisphere usually shows significant unstable and nonlinear divergent responses to climate change as global warming intensifies. The stability of the response of dominant conifers at different altitudes in the Altai Mountains in Northwestern China to climate change remains unknown. With tree-ring samples of Siberian larch (Larix sibirica) collected from high, middle and low altitudes in the middle section of the Altai Mountains, we analyzed the characteristics of three treering width series chronology and the relationship between tree radial growth and climate. The results showed that the radial growth of Siberian larch at high altitude was mainly affected by temperature (including mean temperature, mean minimum and mean maximum temperatures) in April, June, and July. The radial growth of Siberian larch at mid-altitude was mainly affected by mean temperature and mean maximum temperature in May, mean temperature and mean minimum temperatures in June, and precipitation in January and March. However, the radial growth of Siberian larch at low altitude was mainly driven by precipitation in October. In addition, in terms of temporal stability, the limiting effect of temperature on the growth of Siberian larch at high altitude was gradually weakened, while the limiting effect of precipitation on the growth of Siberian larch at middle and low altitudes was increased. Our results provide scientific supports for the management and protection of Siberian larch at different altitudes in Altai Mountains.

 

Key words: dendroecology, response stability, climate change, Larix sibirica, Altai Mountains.