2000-2022年伊犁河流域植被时空变化特征OA北大核心CSTPCD

The Ili River Basin,spanning China and Kazakhstan,features a delicate ecological environment.Un-derstanding the vegetation changes throughout the basin is essential for the region's sustainable development.This study analyzed spatiotemporal vegetation variations in the Ili River Basin from 2000 to 2022,utilizing en-hanced vegetation index data from MODIS.We examined vegetation change disparities within and outside China's portion of the basin,among various vegetation types,and across different elevations.Our findings reveal:(1)Since 2000,vegetation conditions have generally improved across the Ili River Basin,notably in Kazakhstan,whereas a decline was observed within China.Degraded regions are predominantly at elevations between 1000 m and 3000 m.Grasslands and croplands exhibited positive trends,in contrast to forests.(2)Over the past 20 years,the Ili River Basin experienced minor vegetation fluctuations,with more pronounced variations within China.Grasslands encountered higher fluctuations compared to croplands and forests,and the 2500 m to 3000 m eleva-tion range showed relatively stable vegetation.(3)Future projections indicate a prevailing positive trend in vege-tation across the Ili River Basin,with approximately 52%of the areas expected to see ongoing improvement.Grasslands are anticipated to have higher improvement ratios than croplands and forests.Regions below 1000 m and above 3000 m in elevation are likely to experience sustained positive changes.This study's insights into veg-etation dynamics will inform ecological protection strategies in the Ili River Basin.