干旱区研究2025，Vol.42Issue(12)：2231-2244,14.DOI:10.13866/j.azr.2025.12.07
中国干旱半干旱区植被"碳-水"耦合权衡协同作用
Tradeoffs and synergies in carbon-water coupling of vegetation across China's arid and semi-arid regions
摘要
Abstract
This study aims to explore the temporal trends of water use efficiency(WUE)and carbon use efficien-cy(CUE)in the arid and semi-arid regions of China,as well as the trade-off and synergy relationship between car-bon and water processes in these regions.Based on Moderate-resolution Imaging Spectroradiometer(MODIS)da-ta,we quantitatively estimated carbon-water use efficiency from 2001 to 2022.Trend analysis,partial correlation coefficients,geographic detectors,correlation analysis,and multiple regression analysis were employed to exam-ine the variation characteristics of ecosystem WUE and CUE,conduct attribution analysis,and evaluate the cou-pling relationship between the two.The results show that,overall,WUE and CUE remained relatively stable(P>0.05)from 2001 to 2022 in arid and semi-arid regions,although significant trends were observed in certain areas.The dominant factor influencing WUE changes was soil moisture(SM).The influence of climatic factors on WUE was significantly greater than on CUE.Synergistic regions accounted for 21.24%of the study area,mainly located in the northern North China Plain,the northern and southern slopes of the Tianshan Mountains,and the eastern Greater Khingan Mountains.In synergy zones,the annual mean vapor pressure deficit(VPD)predomi-nantly ranged from 0.8 kPa to 0.9 kPa,while in trade-off zones,it ranged from 0.2 kPa to 0.3 kPa.The variation in the WUE-CUE trade-off and synergy relationship in China's arid regions was primarily driven by the response of WUE to changes in climatic factors,with VPD being the main factor responsible for these variations.关键词
水分利用效率/碳利用效率/干旱半干旱区/权衡协同Key words
water use efficiency/carbon use efficiency/arid and semi-arid regions/tradeoff and synergy引用本文复制引用
MA Rongle,XUE Yayong,CHEN Jinglin,WANG Lizhen,ZHANG Fang..中国干旱半干旱区植被"碳-水"耦合权衡协同作用[J].干旱区研究,2025,42(12):2231-2244,14.基金项目
新疆维吾尔自治区重点研发任务专项计划(2022B01012) （2022B01012）
