林业科学2018，Vol.54Issue(3)：161-167,7.DOI:10.11707/j.1001-7488.20180317
哀牢山中山湿性常绿阔叶林水青树年轮宽度对气候变化的响应
Response of Tree Ring Width to Climate Change of Tetracentron sinensis in Humid Evergreen Broad-Leaved Forest in the Middle Ailao Mountains
摘要
Abstract
The relationship between tree-width of Tetracentron sinense and climate factors in the humid evergreen broad-leaved forest in the middle Ailao Mountains was studied in order to explore the potential for reconstructing climate change in the past and to provide a theoretical basis for modelling species distribution and conservation of T.sinense in the context of global climate change.[Methods] Increment cores of T.sinense were collected by increment borer,and tree ring-width was measured with standard dendrochronological techniques.Each tree-ring measurement was assigned to the year of its formation with cross-dating techniques,and then tree-ring series were detrended with negative exponential curve and cubic spline function.The resulting standard chronology was correlated with monthly climatic data from Jingdong meteorological station.[Results] Analysis of tree ring-width chronology and climate factors showed that the radial growth of T.sinense was significantly correlated with mean temperature and extreme high temperature of February and June in the year (P＜0.05).Moreover,ring-width chronology showed significant positive correlation with the number of hours of sunlight (P ＜0.05),but negative correlation with relative humidity of February and March (P ＜ 0.01).Our study demonstrated that multiple climatic factors influenced the radial growth,and the climatic conditions during the early growing season is crucial for the growth of T.sinense.[Conclusion] This study showed that T.sinense in the warm and humid subtropical forests produce distinct and cross-datable annual growth rings.Tree ring-width chronology of T.sinense can reveal considerable climate information,which has high potential for reconstructing past climate change in the study area.关键词
哀牢山/树木年轮/水青树/气候因子/径向生长/气温/降水Key words
Ailao Mountains/tree rings/Tetracentron sinense/climate factors/radial growth/temperature/precipitation分类
农业科技引用本文复制引用
白雪,范泽鑫..哀牢山中山湿性常绿阔叶林水青树年轮宽度对气候变化的响应[J].林业科学,2018,54(3):161-167,7.基金项目
国家自然科学基金面上项目(31770533). （31770533）
