大兴安岭北部不同树种径向生长对气温突变的响应  

Responses of radial growth of different tree species to abrupt temperature change in the northern Greater Khingan Mountains,China

作　　者：邱杨 王兆鹏 张冬有[1,2,3] 李祥友 罗陶然 王新瑞 李琳琳 赵悦如 QIU Yang;WANG Zhaopeng;ZHANG Dongyou;LI Xiangyou;LUO Taoran;WANG Xinrui;LI Linlin;ZHAO Yueru(College of Geographical Sciences,Harbin Normal University,Harbin 150025,China;Heilongjiang Wuyiling Wetland Ecosystem National Observation and Research Station,Yichun 153000,Heilongjiang,China;Wuyiling Wetland Ecosystem Observation and Research Station of Heilongjiang Province,Yichun 153000,Heilongjiang,China)

机构地区：[1]哈尔滨师范大学地理科学学院,哈尔滨150025 [2]黑龙江乌伊岭湿地生态系统国家定位观测研究站,黑龙江伊春153000 [3]乌伊岭湿地生态系统黑龙江省野外科学观测研究站,黑龙江伊春153000

出　　处：《应用生态学报》2024年第11期2933-2941,共9页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(41671064);黑龙江省自然科学基金项目(TD2023D005)资助。

摘　　要：本研究选取大兴安岭北部满归地区主要建群树种兴安落叶松和樟子松,基于树木年代学的方法,构建树轮宽度标准年表,研究两个树种径向生长对气候变化的响应。结果表明:兴安落叶松径向生长主要受温度的限制,与前一年10月和当年3月、5—8月的均温呈显著负相关。樟子松径向生长受温度和降水的共同作用,与当年5月降水和前一年10月、当年5—9月温度呈显著正相关。利用Mann-Kendall检验分析满归地区1960—2021年气温数据,发现该地区年平均气温在1988年发生升温突变。兴安落叶松径向生长在气温突变前后均呈下降趋势,气温突变后其径向生长的下降趋势略微增强。樟子松径向生长变化明显,气温突变前呈下降趋势,气温突变后呈显著上升趋势,且对气温响应有所增强,与当年5月平均最低气温呈显著正相关。滑动相关分析表明,随着该地区的气候变化,兴安落叶松径向生长对气候因子的响应敏感性呈先增强后减弱的变化,樟子松径向生长对气候因子的响应敏感性逐渐增强。We constructed standardized chronologies of tree-ring width of Larix gmelinii and Pinus sylvestris var.mongolica,the main tree species in the Mangui region of the northern Greater Khingan Mountains based on dendrochronology methods,we explored the responses of radial growth of the two species to climate change.The results showed that the radial growth of L.gmelinii was mainly limited by temperature,which was significantly negatively related to mean temperature in October of the last year and that in March and May-August of the present year.The radial growth of P.sylvestris var.mongolica was promoted by both temperature and precipitation,which was significantly positively related to precipitation in May of the present year and temperature in October of the last year and May-September of the present year.We analyzed temperature data from 1960 to 2021 in the Mangui region using the Mann-Kendall test,and found that mean annual temperature of the region had a warming abrupt change in 1988.L.gmelinii radial growth showed a decreasing trend both before and after the abrupt temperature change,and the downward trend of its radial growth increased slightly after the abrupt change.Radial growth of P.sylvestris var.mongolica changed significantly,with a decreasing trend before the abrupt change and a significant increasing trend after the abrupt change.The response to temperature was enhanced after the abrupt change,with a remarkable positive relationship with the monthly average minimum temperature in May of the present year.The analysis of sliding relationship showed that the sensitivity of L.gmelinii radial growth to climatic factors changed first to increase and then to weaken,and that of P.sylvestris var.mongolica radial growth gradually increased.

关 键 词：兴安落叶松 樟子松 径向生长 气温突变 

分 类 号：S718.512[农业科学—林学]