生态学报2026，Vol.46Issue(7)：3532-3545,14.DOI:10.20103/j.stxb.202505141166
基于集成生物圈模型的黄河流域植被演变及碳收支研究
Research on vegetation evolution and carbon budget in the Yellow River Basin based on the Integrated Biosphere Simulator model
摘要
Abstract
The Yellow River Basin served as a critical ecological barrier and economic corridor in China,characterized by complex topography,pronounced climatic variability,and intensive human-environment interactions,which resulted in significant spatial heterogeneity of ecosystem structure and function.In the context of implementing China's national strategy for ecological protection and high-quality development of the Yellow River Basin,a comprehensive understanding of vegetation dynamics and carbon cycling became essential for developing effective carbon offset mechanisms and enhancing regional ecosystem management capacity.Given the challenges in accurately simulating vegetation dynamics under the Yellow River Basin's complex terrain and diverse climatic conditions,this study developed an enhanced Integrated Biosphere Simulator(IBIS)adapted to the regional ecological characteristics.Based on the improved model,we systematically simulated vegetation evolution and carbon budget dynamics during 2000 to 2023,and examined their spatiotemporal patterns and relationships with hydroclimatic and topographic factors.Key findings included:(1)Model enhancements through sub-basin unit simulation,optimized leaf growth algorithms,and localized phenological parameterization significantly improved regional applicability,the improved IBIS model produced results closely aligned with multi-year observations from various flux stations and demonstrated strong consistency with remote sensing data(77％of computational units achieved R2＞0.8).(2)Temporally,Gross Primary Productivity(GPP),Net Primary Productivity(NPP),and Net Ecosystem Productivity(NEP)demonstrated mean annual increments of 6.4,4.7,and 4.3 g C m-2 a-1,respectively,indicating sustained vegetation improvement.Carbon dynamics exhibited pronounced monthly seasonality,functioning as a net sink during May—October and source during November—April,with peak net carbon sequestration(36 g C/m2)occurring in August.(3)Spatially,the basin operated as a net carbon sink with a mean annual uptake of 129.82 g C m-2 a-1 and total sequestration of 103.31 Mg C/a.Carbon budget exhibited a southeast-to-northwest decreasing gradient,with carbon source areas concentrated in arid northwestern regions,while mid-to-low elevation semi-humid and semi-arid zones demonstrated the most rapid carbon sink enhancement.(4)Precipitation emerged as a dominant control on carbon budget spatial patterns.Temperature demonstrated stronger enhancement of ecosystem respiration relative to precipitation,while NEP exhibited lower precipitation sensitivity compared to GPP and NPP.Overall,the improved IBIS model effectively captured the actual carbon budget characteristics of the Yellow River Basin ecosystem,providing robust scientific support for strategic regional ecological conservation and restoration efforts and for achieving China's dual carbon goals.关键词
集成生物圈模型(IBIS)/黄河流域/碳收支/动态植被模型/生态地理分区/子流域单元模拟Key words
Integrated Biosphere Simulator model(IBIS)/Yellow River Basin/carbon budget/DGVM/eco-geographic zoning/sub-basin unit simulation引用本文复制引用
赵津,王坤,周祖昊,严登华,刘佳嘉,王佳琦..基于集成生物圈模型的黄河流域植被演变及碳收支研究[J].生态学报,2026,46(7):3532-3545,14.基金项目
国家自然科学基金黄河水科学研究联合基金项目(U2243601) （U2243601）
国家重点研发计划项目(2024YFF1306300,2022YFO3201700) （2024YFF1306300,2022YFO3201700）
水利部重大科技项目(SKR-2022056) （SKR-2022056）
