生态环境学报2026，Vol.35Issue(4)：509-519,11.DOI:10.16258/j.cnki.1674-5906.2026.04.002
共和盆地植被总初级生产力对干旱的响应
Response of Vegetation Gross Primary Productivity to Drought in the Gonghe Basin
摘要
Abstract
The Gonghe Basin,situated in the northeastern Tibetan Plateau,serves as the core area of the Hainan State National Innovation Demonstration Zone for Sustainable Development Agenda,faces significant vegetation growth constraints due to drought,which underscored the necessity of exploring vegetation-drought response mechanisms for regional ecosystem sustainability.Utilizing Gross Primary Productivity(GPP)and Standardized Precipitation Evapotranspiration Index(SPEI)data from 2001 to 2021,this study systematically investigated vegetation-drought interactions through Theil-Sen Median trend analysis,Mann-Kendall testing,and Pearson correlation analysis.The results revealed distinct spatial heterogeneity in GPP,with higher values observed in marginal zones and lower values in the central basin,alongside a 63.45%overall GPP increase during 2001-2021,except for minor declines in limited eastern margins.SPEI dynamics exhibited moderate fluctuations(annual mean:-0.27 to 0.73)during 2001-2010 under relatively humid conditions,followed by intensified drought events after 2011,with SPEI declining sharply to its lowest value in 2021.Vegetation exhibited prolonged recovery patterns,as dominant drought response lag times clustered at 9 and 11 months.Altitude-dependent cumulative effects were identified:low-elevation vegetation displayed delayed drought impacts at 9-and 12-month intervals,indicating lower sensitivity,while high-elevation areas showed a 6-month cumulative effect with negative correlations,suggesting snowmelt-regulated drought sensitivity.These findings highlighted spatiotemporal differentiation in drought-vegetation interactions and provided critical insights for ecological restoration strategies and early-warning systems in vulnerable plateau ecosystems.关键词
干旱/总初级生产力/植被响应/共和盆地Key words
drought/gross primary productivity(GPP)/vegetation response/Gonghe Basin分类
农业科技引用本文复制引用
鲁濠,曹广超,苏万峰,赵美亮,薛峰..共和盆地植被总初级生产力对干旱的响应[J].生态环境学报,2026,35(4):509-519,11.基金项目
青海省重大科技专项(2021-SF-A7-1) （2021-SF-A7-1）
青海自然地理与环境过程重点实验室(2020-ZJ-Y06) （2020-ZJ-Y06）
