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冰川冻土 ›› 2017, Vol. 39 ›› Issue (1): 165-174.doi: 10.7522/j.issn.1000-0240.2017.0020

• 寒旱区生物学 • 上一篇    下一篇

大兴安岭北部多年冻土区落叶松和樟子松生长的气候响应差异研究

张轩文1,2, 杨丽3, 刘晓宏1, 张秋良3, 王文志4, 曾小敏1,2, 吴国菊1,2   

  1. 1. 中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室, 甘肃 兰州 730000;
    2. 中国科学院大学, 北京 100049;
    3. 内蒙古农业大学 林学院, 内蒙古 呼和浩特 010018;
    4. 中国科学院 水利部 成都山地灾害与环境研究所, 成都 610041
  • 收稿日期:2016-08-09 修回日期:2016-12-07 出版日期:2017-02-25 发布日期:2017-06-03
  • 通讯作者: 刘晓宏,E-mail:liuxh@lzb.ac.cn. E-mail:liuxh@lzb.ac.cn
  • 作者简介:张轩文(1989-),男,甘肃庆城人,2012年在成都信息工程大学获学士学位,现为中国科学院西北生态环境资源研究院在读硕士研究生,从事树轮气候学方面的研究.E-mail:zhangxw-08@163.com
  • 基金资助:
    国家重大科学研究计划(973计划)项目(2013CBA01808);国家自然科学基金项目(41571196);冰冻圈科学国家重点实验室自主课题(SKLCS-ZZ-2016)资助

Study of the difference in climate response of Dahurian Larch and Pinus sylvestris growth in the north Great Higgnan Mountains of permafrost regions, Northeast China

ZHANG Xuanwen1,2, YANG Li3, LIU Xiaohong1, ZHANG Qiuliang3, WANG Wenzhi4, ZENG Xiaomin1,2, WU Guoju1,2   

  1. 1. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Forest College of Inner Mongolia Agricultural University, Huhhot 010018, China;
    4. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2016-08-09 Revised:2016-12-07 Online:2017-02-25 Published:2017-06-03

摘要: 以大兴安岭北部根河、呼中和汗马冻土区落叶松和樟子松为样本,建立了五个树轮宽度年表,并计算获取了五个样点的树轮截面积指数(BAI)序列。树轮BAI-气候响应关系分析表明,气温为这一地区落叶松和樟子松生长的主要限制因子;但落叶松和樟子松对气候变化的响应存在差异。落叶松BAI与3月平均气温,樟子松BAI与前一年12月至当年4月平均气温均呈显著负相关。考虑到水热综合影响,落叶松BAI控制因子由1957-1990年与其呈显著正相关的1月份SPEI转变为1991-2013年与其呈显著正相关的1-4月SPEI和与其呈显著负相关的3月份平均气温;樟子松BAI控制因子则由1957-1990年与其呈显著负相关的2月和8月份平均气温转变为1991-2013年与其呈显著正相关的7月份降水量和6-7月SPEI。结果表明,在全球变暖背景下,水热环境改变使得冻土区树木生长限制因子发生变化。

关键词: 落叶松, 樟子松, 种间差异, 树木生长, 多年冻土区, 全球变暖

Abstract: Based on the Dahurian Larch and Pinus sylvestris tree-ring samples taken from Genhe, Hanma and Huzhong permafrost regions in the north Great Higgnan Mountains, five tree-ring width chronologies were established, and then the basal area increment (BAI) was calculated for the five sites. The response analysis showed that temperature was the dominant factor affecting the tree growth in these regions, with distinct difference between the two species. BAI of Dahurian Larch was significantly and negatively correlated with the monthly average temperature in March. BAI of Pinus sylvestris was significantly and negatively correlated with the monthly averaged temperature from previous December to current April. The climate limiting factor on the radial growth of Dahurian Larch had transformed from a significant negatively correlation with SPEI index in Janurary from 1957 to 1990 into a significant correlation with SPEI index from Janurary to April and temperature in March from 1991 to 2013, and the climate limiting factor for Pinus sylvestris had changed from a significant negative correlation with February and August temperatures from 1957 to 1990 to a significant correlation with precipitation in July and SPEI index from June to July from 1991 to 2013. These results indicated that the two species responding to climate change, especially, to temperature change, was different under the background of global warming, even the climate limiting factor on radial growth would change in different periods for the same species.

Key words: Dahurian Larch, Pinus sylvestris, species-specific response, tree growth, permafrost regions, global warning

中图分类号: 

  • P467