生态环境学报2026，Vol.35Issue(3)：393-402,10.DOI:10.16258/j.cnki.1674-5906.2026.03.006
黄河源区植被总生产力对气候干旱的响应
Response Mechanism of Gross Primary Productivity to Climatic Drought in the Yellow River Source region
摘要
Abstract
Drought,as a key climatic factor influencing the terrestrial ecosystem carbon cycle,plays a significant regulatory role in vegetation gross primary productivity(GPP).The response mechanism of vegetation productivity to drought in the Yellow River Source Region,a crucial water conservation area in the Yellow River Basin,remains unclear.Therefore,based on Bayesian theory,Copula joint distribution,and SHAP interpretability methods,this study systematically evaluated the spatiotemporal impacts of drought on vegetation GPP and its driving mechanisms.The results indicated that:1)from 2002 to 2022,vegetation GPP in the Yellow River Source Region generally exhibited an increasing trend,with a spatial gradient decreasing from the southeast to the northwest;2)the standardized precipitation evapotranspiration index(SPEI)showed a positive correlation with GPP at the pixel scale,with a maximum correlation coefficient of 0.23;3)the lag time of vegetation response to climatic drought displayed spatial heterogeneity,with shorter lags in the southern and southeastern regions and longer lags in the northern and northwestern regions;4)the risk of vegetation loss in the western part of the source region was higher than in the eastern part,and the probability of vegetation loss increased with drought severity,though the rate of increase was relatively limited;5)temperature was the primary driver of GPP variation,coordinating with other environmental factors to influence vegetation productivity.This study reveals the spatiotemporal differences in vegetation productivity response to climatic drought in the Yellow River Source Region,providing a scientific basis for adaptive management of alpine ecosystems.关键词
植被总初级生产力/气候干旱/响应机制/黄河源区Key words
gross primary productivity/climatic drought/response mechanism/Yellow River source region分类
农业科技引用本文复制引用
程文杰,倪用鑫,吕锡芝,马力,张秋芬,王建伟,张恒硕,邓文彦..黄河源区植被总生产力对气候干旱的响应[J].生态环境学报,2026,35(3):393-402,10.基金项目
国家自然科学基金项目(U2243214 （）
52209023 （）
52322903) （）
"十四五"国家重点研发计划项目(2022YFC3201700) （2022YFC3201700）
水灾害防御全国重点实验室"一带一路"水与可持续发展科技基金项目(2024nkms04) （2024nkms04）
