川西高原两种针叶树径向生长对气候因子的响应  

Responses of radial growth of two coniferous species to climate factors in western Sichuan Plateau,China

作　　者：李静茹[1] 彭剑峰[1,2,3] 杨柳 崔佳月[1] 李轩 彭猛 LI Jing-ru;PENG Jian-feng;YANG Liu;CUI Jia-yue;LI Xuan;PENG Meng(College of Geography and Enwironment Science,Henan University,Kaifeng 475004,Henan,China;National Demonstration Center for Environmental and Planning,Henan University,Kaifeng 475004,Henan,China;Ministry of Education Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions,Kaifeng 475004,Henan,China)

机构地区：[1]河南大学地理与环境学院,河南开封475004 [2]河南大学环境与规划国家级实验教学示范中心,河南开封475004 [3]黄河中下游数字地理技术教育部重点实验室,河南开封475004

出　　处：《应用生态学报》2021年第10期3512-3520,共9页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(41671042,42077417)资助。

摘　　要：基于树轮年代学手段,建立了岷江冷杉和方枝柏树轮宽度标准年表以及混合树种年表,研究川西地区理县凉台沟两种针叶树种径向生长对气候变化的响应,为全球变暖背景下该地区森林生态系统的保护与管理提供依据。结果表明:混合年表中包含了2个单个年表的共同气候信息,其信噪比和样本总体解释量均高于单个年表。与气候因子的相关分析显示,3个年表对气候要素的响应表现出较好的一致性,均对温度响应敏感,尤其是方枝柏最为敏感。相对湿度在5、10月对两树种的限制作用明显强于降水。1994年升温突变后,岷江冷杉宽度年表与月均温的相关性变化最为明显,部分月份由负相关转变为正相关,表明岷江冷杉树木径向生长对温度的响应呈现出不稳定性,但两树种径向生长呈差异性变宽趋势,对气温响应的敏感性减弱。Based on the method of tree-ring chronology,we established ring-width standard chrono-logies of Abies faxoniana and Sabina saltuaria in Liangtaigou,Lixian County,western Sichuan Province,and their regional composite chronology(RC)to study the responses of radial growth of those two coniferous species to climate change,which provided a basis for the protection and mana-gement of forest ecosystems in this region under the background of global warming.The results showed that the RC contained the common climatic information of two individual chronologies,which had higher signal-to-noise ratio and expressed population signal.The correlation analysis showed that three chronologies had a good consistency in the response to climate factors.All chronologies were significantly correlated with temperature,with S.saltuaria being more sensitive to temperature changes.Relative humidity had stronger limiting effect on both species than precipitation in May and October.After the abrupt warming in 1994,the correlation between ring-width chrono-logy of A.faxoniana and monthly mean temperature shifted obviously from negative to positive in some months,which indicated the radial growth of A.faxoniana showed unstable in response to temperature.However,the radial growth of both species showed different broadening trend and the sensitivity to temperature response was weakened.

关 键 词：川西高原 树木年轮 岷江冷杉 方枝柏 气候响应 

分 类 号：S718.5[农业科学—林学]