天山北坡雪岭云杉树轮宽度年表梯度特征分析  

Gradient Chronology Features of Picea Schrenkiana in the North Slope of Tianshan Mountains

作　　者：喻树龙[1] 李淑娟[1] 姜盛夏 张同文[1] 张瑞波[1] 秦莉[1] 尚华明[1] 张合理 YU Shulong;LI Shujuan;JIANG Shengxia;ZHANG Tongwen;ZHANG Ruibo;QIN Li;SHANG Huaming;ZHANG Heli(Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration/Xinjiang Laboratory of Tree-ring Ecology,Institute of Desert Meteorology,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,中国气象树木年轮理化研究重点开放实验室,新疆树木年轮生态实验室,新疆乌鲁木齐830002

出　　处：《沙漠与绿洲气象》2020年第2期1-9,共9页Desert and Oasis Meteorology

基　　金：自治区重点实验室开放课题(2016D03005);国家自然科学基金(41975095);公益性科研院所基本科研业务费专项资金项目(IDM201202)。

摘　　要：在天山北坡不同区域间隔海拔高度100 m左右采集5个树轮梯度年表,分析树木径向生长沿海拔高度变化的规律。结果发现:在树轮年表特征中,平均轮宽、树龄和敏感度等存在海拔梯度变化,平均轮宽和敏感度随海拔升高而降低,而平均树龄则与海拔高度呈正相关。高海拔采样点在同一区域和不同区域间一致性最好,低海拔采样点次之,而森林中部最差,东部和中部低海拔区域采样点的一致性要好于西部,坡向、坡度等小生境的差异也是影响树轮生长垂直变化规律的重要因素。存在同时影响不同海拔高度树轮生长的环境要素,西部和中部高海拔树木对该要素的响应更显著,在更为干旱的天山北坡中部和东部,对树木径向生长的影响较大的环境因子要多于西部伊犁地区。Tree-ring cores were taken from five sampling sites with different elevations on the north slopes of Tianshan Mountains at the elevation intervals about 100 meters.Tree-ring width chronologies of Picea schrenkiana were determined using standard dendrochronological methods.The parameters including average tree-ring width,tree age,and mean sensitivity change with elevation gradient.The average tree-ring width and mean sensitivity decreased with increasing altitude,while the average tree age was positively correlated with altitude.The consistency is the best among the high altitude sampling sites from the same and different regions,followed by the low altitude sites,and the middle part of the forest is the worst.The consistency of sampling sites in the eastern and central low-altitude areas is better than that in the west.The differences in habitats such as slope direction and slope were important factor that affected the vertical change of tree growth along the elevation gradient.There were environmental factors that affect the growth of tree rings at different altitudes at the same time,and the response of high altitude chronology is more significant in the west and middle.The environmental factors affecting the radial growth of trees in the drier middle and eastern parts of the northern slope of the Tianshan Mountains were more than that in western Ili Kazak Autonomous Prefecture.

关 键 词：雪岭云杉(Picea schrenkiana) 天山北坡 树木年轮 海拔梯度 年表特征 

分 类 号：P467[天文地球—大气科学及气象学]