川西康定云冷杉径向生长对气候变化响应的差异  

Differences in the response of radial growth to climate change between spruces and firs in Kangding,West Sichuan

作　　者：魏靖轩 许昆 张远东 鲁庆奥 缪宁[2] WEI Jingxuan;XU Kun;ZHANG Yuandong;LU Qingao;MIAO Ning(Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China;Key Laboratory of Bio-resource and Eco-environment of Ministry of Education,College of Life Sciences,Sichuan University,Chengdu 610065,China)

机构地区：[1]中国林业科学研究院,森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091 [2]四川大学生命科学学院,教育部生物资源和生态环境重点实验室,成都610065

出　　处：《生态学报》2024年第23期10906-10914,共9页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(32271646,31971460)。

摘　　要：为分析青藏高原东缘横断山区中部不同海拔云杉和冷杉径向生长对气候响应的差异,于甘孜州康定海拔3200m(低海拔)、3500m(中海拔)、4000m左右(高海拔,林线处)采集154棵云冷杉(丽江云杉和长苞冷杉)树轮样芯,对不同海拔不同树种建立年表并与各月气象数据进行相关分析。结果表明:低海拔云杉年表与前一年11月最高温显著正相关,低海拔冷杉年表与5月降水量显著正相关、与前一年10月至当年5月帕默尔干旱指数极显著正相关;中海拔云杉年表与前一年9月最高温显著正相关,中海拔冷杉年表与5月均温和最低温显著正相关;高海拔云杉年表与5月均温和最高温显著正相关、与前一年10月均温显著负相关,高海拔冷杉年表与1月均温和最高温显著正相关。结果说明低海拔云杉受气候变暖的影响较少,而低海拔冷杉受到冬春季干旱胁迫的严重抑制;温度是限制中高海拔云冷杉径向生长的主要因素。研究结果可为该区树木生长与气候关系和生态安全提供支持。In order to analyze the difference in the response of radial growth between spruces and firs at different altitudes to climate change in the central Hengduan Mountains on the eastern edge of the Tibetan Plateau,a total of 154 Picea likiangensis and Abies georgei tree cores were collected from Kangding,Ganzi Prefecture,at altitudes of 3,200 m(low altitude),3,500 m(middle altitude),and 4,000 m(high altitude,at the timberline),and the chronologies of the different altitudes and species were set up,and correlation analyses were carried out based on the monthly meteorological data.The results showed that the chronology of Picea likiangensis at low elevation site was significantly and positively correlated with the maximum temperature in November of the previous year,while the chronology of Abies georgei at low elevation site was significantly and positively correlated with the precipitation in May,and significantly and positively correlated with the Palmer Drought Index from October of the previous year to May of the current year;the chronology of Picea likiangensis at mid-elevation site was significantly and positively correlated with the maximum temperature in September of the previous year,and the chronology of Abies georgei at mid-elevation site was significantly and positively correlated with the mean and minimum temperature in May;the chronology of Picea likiangensis at high elevation site was significantly and positively correlated with the mean and minimum temperature in May and negatively correlated with the mean temperature in October of the previous year;and the chronology of Abies georgei at high elevation site was significantly and positively correlated with the mean and the maximum temperature in January.The results have indicated that the low-elevation spruces were less affected by climate warming,while low-elevation firs were severely suppressed by winter and spring drought stress and temperature was the main factor limiting the radial growth of middle and high elevation spruces and firs.The results of

关 键 词：树轮 气候变化 响应 冷杉 云杉 

分 类 号：S791.14[农业科学—林木遗传育种]