水土保持研究2025，Vol.32Issue(3)：231-240,10.DOI:10.13869/j.cnki.rswc.2025.03.043
半干旱区草原生态环境质量时空变化及其驱动因素研究
Research on the spatiotemporal change of ecological environment quality and its driving factors in semi-arid grasslands
摘要
Abstract
[Objective]Accurate assessment of ecological environment quality in semi-arid grasslands is crucial for their sustainable development in China.[Methods]Using Xilingol League,a typical semi-arid grassland in northern China,as the research area,a modified remote sensing ecological index(MRSEI)based on Google Earth Engine was developed,integrating six indicators:greenness,humidity,dryness,heat,topsoil grain size,and grassland degradation.The ecological environment quality from 2000 to 2023 was evaluated using methods including univariate linear regression,Pearson correlation analysis,and Hurst index,revealing its spatiotemporal evolution characteristics and driving factors.[Results]The average contribution rate of the first principal component of MRSEI was 83.5%,and the average eigenvalue was 0.222.The MRSEI developed in this study effectively integrated multiple ecological indicators,and the indicators of topsoil grain size and grassland degradation played a key role in the ecological assessment of semi-arid grasslands.From 2000 to 2023,the fluctuation range of MRSEI in the study area was 0.273～0.395,indicating a slight overall improvement.Among them,the ecological environment of typical grasslands in the central and northeastern regions significantly improved,representing 62.1%of the area,while the ecological environment of grasslands around the desert and forest deteriorated,affecting 32.9%of the area.Areas where ecological environment may continue to deteriorate or remain uncertain in the future accounted for 66.3%,highlighting the need to designate ecological early warning zones for protection.Ecological environment quality was most sensitive to precipitation,with 33.8%of the area showing significant correlation,followed by temperature,accounting for 8%.Human activities also had a significant impact on ecological environment quality.[Conclusion]During the overall improvement in ecological environment quality of Xilingol grasslands,precipitation is the primary climatic driving factor,followed by temperature.Human activities also significantly influence ecological environment quality.关键词
生态环境质量/改进型遥感生态指数/气候变化/锡林郭勒盟Key words
ecological environment quality/modified remote sensing ecological index/climate change/Xilingol League分类
环境科学引用本文复制引用
杨霞,乌吉木吉,朝力格尔..半干旱区草原生态环境质量时空变化及其驱动因素研究[J].水土保持研究,2025,32(3):231-240,10.基金项目
内蒙古自治区高等学校科学研究项目"锡林郭勒草原区产业布局与土地生态状况协调性研究"(NJSY21459) （NJSY21459）
内蒙古农业大学高层次/优秀博士引进人才科研启动项目"自然资源调查评价与国土空间规划"(NDYB2019-23) （NDYB2019-23）
