Human activity is one of the most important factors that affects the changes of ecosystem service value(ESV),so the exploration of their spatio-temporal relationship would facilitate a coordinated development between ecology,environ-ment,society and economy.By taking Xi'an metropolitan area as the research object,this study constructed four models including an ESV assessment model,an ESV flow gain/loss model,a human activity intensity(HAI)index assessment model,and a bivariate spatial autocorrelation model,based on the land use data in 1990,2000,2010,and 2018 at a grid scale of 2 km×2 km,so as to get insights into the spatiotemporal relationship between ESV and the intensity of human ac-tivities.The results of this study demonstrate that:(1)Between 1990 and 2018,the ESV in Xi'an metropolitan area show-cased a continuous downward trend on the time scale,with a total decrease of RMB 1.28 billion yuan over the past 30 years;on the spatial scale,it showed an increasingly widened distribution pattern centered on Xi'an's main urban area,with an extension to the periphery;(2)The ESV gain mainly stemmed from the conversion of cropland to forest land,water and grassland,while the ESV loss mainly caused by the transfer-in of cropland and construction land as well as the trans-fer-out of waters;(3)The intensity of human activities showed a decreasing spatial distribution pattern from the center of Xi'an City to both of its northern and southern regions,with the high-impact zones concentrated in Xi'an's main city and its periphery,while the low-impact ones were distributed at the northern and southern ends of the research area;and(4)ESV is negatively correlated with the intensity of human activities,with the clustering relationships between the two dominated by low-high and high-low aggregation modes.The low-high and high-low aggregation areas have a high signifi-cance level.It is expected that this study on the spatiotemporal relationships between ESV and the intensity of human activ-ities would provide theoretical support for the sustainable development of related regions.
关键词
生态系统服务价值/人类活动强度/格网尺度/双变量空间自相关性/西安都市圈
Key words
ecosystem service value/human activity intensity/grid scale/bivariate spatial autocorrelation/Xi'an metro-politan area
维普
万方数据