阿尔泰山西伯利亚云杉多种树轮宽度年表研制及其气候响应研究  

Development of multiple tree-ring width chronologies of Picea obovata for the Altay Mountains,China,and their climate response

作　　者：姜盛夏 袁玉江[1,2,3] 喻树龙 尚华明[1,2,3] 张瑞波 秦莉[1,2,3] 张合理 张同文[1,2,3] JIANG Shengxia;YUAN Yujiang;YU Shulong;SHANG Huaming;ZHANG Ruibo;QIN Li;ZHANG Heli;ZHANG Tongwen(Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China;Key Laboratory of Tree-ring Ecology of Xinjiang Uygur Autonomous Region,Urumqi 830002,China;Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration,Urumqi 830002,China)

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,乌鲁木齐830002 [2]新疆维吾尔自治区树木年轮生态重点实验室,乌鲁木齐830002 [3]中国气象局树木年轮理化研究重点实验室,乌鲁木齐830002

出　　处：《地球环境学报》2020年第6期616-628,共13页Journal of Earth Environment

基　　金：中国沙漠气象科学研究基金项目(Sqj2016015);国家自然科学基金项目(41975095);中央级公益性科研院所基本科研业务费项目(IDM2018004)。

摘　　要：利用树轮图像分析法,获取了阿尔泰山较低海拔西伯利亚云杉(Picea obovata)的全轮、早材和晚材树轮宽度数据,并建立三种树轮宽度年表。通过对树轮宽度年表统计特征及年表与气候因子的相关分析发现:早材生长对气候变化的敏感性更强,而晚材宽度中含有的气候信息相对较少。三种年表对气候因子的响应结果较为一致,但也存在一定的差异性。水分是研究区树木径向生长的主要限制因子。其中,全轮和早材年表与上年7月至当年6月的总降水量正相关性最高(p<0.01),晚材年表与当年4月至7月总降水量正相关性最高(p<0.01)。上年降水量的滞后效应对早材生长的影响比晚材更大。滑动相关分析结果显示,降水量对树木径向生长的影响呈减弱趋势。Background,aim,and scope The Altay Mountains in China extend approximately 500 km from east to west with average elevation of 3000 m.The widespread distribution of conifers within this mountainous area provides good opportunity for undertaking tree-ring research.To date,some dendroclimatological studies have been carried out in this area.However,previous studies have seldom considered the relative widths of earlywood and latewood.Thus,this study focused on tree-ring earlywood and latewood to elucidate the relationship between the radial growth of Siberian spruces and climatic elements.Materials and methods Total of 410 cores from 228 Siberian spruces located in the low-altitude area were collected on the southern slope of the Altay Mountains,China.Every sample was dealt following standard dendrochronological techniques.Every tree ring was scanned using an Epson LA 1600+.The boundary of earlywood and latewood has been confirmed by the 50%gray value of every single tree-ring image,and WinDendro Systems was used to measure the tree-ring,earlywood and latewood widths.Three kinds of ring-width from 150 cores were obtained and developed chronologies(TRW,EWW and LWW)due to the quality of images.Relationships between chronologies and climatic factors were investigated by calculating the Person correlation coefficients and the moving correlation coefficients with a 31-year time window.Results The high values of standard deviation and mean sensitivity of the EWW chronology reveal that earlywood growth responds more sensitively to the changing of climatic elements.Values of mean within-tree correlation,first principal component and expressed population signal of the LWW chronology are obviously lower than that of the TRW and EWW chronologies,which indicate that the coherence of latewood width variation is relatively weaker.Values of signal-to-noise ratio of the TRW and EWW chronology are similar and obviously higher than the LWW chronology.The relatively coherent climate responses suggest that three kinds of chronologies ar

关 键 词：阿尔泰山 西伯利亚云杉 树木年轮 早材 晚材 气候响应 

分 类 号：S791.18[农业科学—林木遗传育种]