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天山北坡西部雪岭云杉海拔梯度生态弹性变化

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基于天山北坡西部温泉哈夏林区间隔100 m海拔高度采集的雪岭云杉梯度样本的断面积生长量资料,分析树木生态弹性变化.干旱事件是区域生态弹性最主要的干扰因子,高温事件也是干扰因子之一.干扰因子的强度会造成生态弹性梯度特征的变化.在极端干旱年份,哈夏林区梯度生态弹性特征最显著,即中高海拔为强抵抗力和弱恢复力,而低海拔则呈相反态势,并出现生长衰退现象.中旱事件时不同海拔均为强抵抗力和较强的恢复力,高温年份低海拔呈现弱抵抗力和弱恢复力.在发生持续干旱时,不同海拔高度的树木生长均受到遏制,但低海拔衰退强度大于高海拔区域,高海拔区域树木对干旱的适应能力要强于中低海拔.
Ecological Resilience of Picea schrenkiana along Altitude Gradients in the Western Section of the Northern Slope of Tianshan Mountains,China
Based on the data of basal area increment of Picea schrenkiana that collected at intervals of 100 m altitude gradients in the Wenquan-Haxia forest area of the western section of the northern slope of the Tianshan Mountains,the changes in ecological resilience of trees in this region were analyzed.Drought events are the most significant disturbance factor for regional ecological resilience,while high temperature events are also one of the disturbance factors.The intensity of these disturbance factors leads to changes in the characteristics of ecological resilience gradients.In extreme drought years,the gradient growth resilience characteristics of the Haxia area are most pronounced,with strong resistance and weak recovery at mid-to-high altitudes,and the opposite trend at low altitudes,accompanied by growth decline.During moderate drought events,all altitudes exhibit strong resistance and relatively strong recovery.In high temperature years,low altitudes show weak resistance and recovery.When drought events persist in the Haxia forest area,tree growth is suppressed at all altitudes,but the decline intensity is greater at low altitudes than at high altitudes.Trees at high altitudes have stronger drought adaptation ability than those at mid-to-low altitudes.

Picea schrenkiananorth slope of Tianshan MountainsTree-ringelevation gradientecological elasticity

喻树龙、郭冬、姜盛夏、张同文、范煜婷、张瑞波、秦莉、尚华明

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中国气象局乌鲁木齐沙漠气象研究所/中国气象局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

雪岭云杉(Picea schrenkiana) 天山北坡 树木年轮 海拔梯度 生态弹性

自治区重点实验室开放课题国家自然科学基金国家重点研发计划—政府间国际科技创新专项

2020D04040423751962023YFE02700

2024

沙漠与绿洲气象
新疆维吾尔自治区气象学会 中国气象局乌鲁木齐沙漠气象研究所

沙漠与绿洲气象

CSTPCD
影响因子:1.007
ISSN:1002-0799
年,卷(期):2024.18(5)