干旱区研究2026，Vol.43Issue(6)：1230-1244,15.DOI:10.13866/j.azr.2026.06.10
2000-2022年乌兰布和沙漠主要植物群落覆盖度时空动态及驱动因素
Spatiotemporal dynamics and driving factors of fractional vegetation cover in major plant communities of the Ulan Buh Desert from 2000 to 2022
摘要
Abstract
Desert vegetation plays crucial roles in ecosystem stability and desertification control.This study ana-lyzed the spatiotemporal dynamics and driving factors of fractional vegetation cover(FVC)in major plant com-munities of the Ulan Buh Desert using multi-source remote sensing and ground observation data from 2000-2022.Applying Theil-Sen Median trend analysis,Mann-Kendall significance testing,and geographical detector methods,we identified 41 typical plant communities in the Ulan Buh Desert,which were dominated by Nitraria tangutorum(3197.84 km2),Artemisia ordosica(2168.86 km2),and Ammopiptanthus mongolicus-Nitraria tanguto-rum(1055.46 km2)communities.The overall FVC was mainly low to moderate,with distinct interannual periodic fluctuations that were especially intense in 2014-2018.FVC fluctuation amplitude varied significantly among dif-ferent communities,ranging from the most stable Artemisia blepharolepis community(19.13%)to highly fluctuat-ing communities such as Calligonum mongolicum(approaching 100%).Spatially,the interannual FVC changes in the Ulan Buh Desert exhibited significant increases in northeastern and southeastern regions,non-significant de-creases in the central desert hinterland,and alternating increases and decreases in western regions.Spatial differ-entiation was driven primarily by coupled precipitation and hydrological factors(explanatory power up to 0.583).Two-factor interactions generally exceeded single-factor effects,particularly the interactions between precipita-tion-hydrological factors and between precipitation,hydrological,and soil factors.The impacts of human activity on plant community FVC were relatively limited(q≤0.187).关键词
乌兰布和沙漠/植物群落/植被覆盖度/时空动态/地理探测器Key words
Ulan Buh Desert/plant communities/fractional vegetation coverage/spatiotemporal dynamics/geographical detector引用本文复制引用
李怡霖,于明含,丁国栋,李锦荣..2000-2022年乌兰布和沙漠主要植物群落覆盖度时空动态及驱动因素[J].干旱区研究,2026,43(6):1230-1244,15.基金项目
乌兰布和沙漠治理与湖泊保护协调控制技术集成与示范(2023YFHH0068) （2023YFHH0068）
中国水利水电科学院基本科研业务费项目(MK0199A122021) （MK0199A122021）
