湖北省生态系统服务价值演变及影响因素分析

Analysis of evolution and influencing factors of ecosystem service value in Hubei Province

针对区域生态系统服务价值(ESV)多在单一尺度下进行分析以及影响因素存在空间异质性的问题,该文利用ESV评估模型、空间自相关分析和地理探测器等方法,基于1980—2020年土地利用等数据,分析了湖北省土地利用变化下的ESV时空变化、多尺度时空格局特征,探讨了ESV空间分异的影响因素。结果表明:(1)湖北省1980—2020年耕地、未利用地呈减少趋势,建设用地、水域呈增加趋势,林地、草地维持相对稳定;(2)近40年间湖北省ESV增加了459.83亿元,水域是ESV增加的贡献者;(3)湖北省多尺度全局自相关分析表明7 km格网尺度下的ESV空间集聚性最为显著,局部自相关分析显示以襄州区—宜都市为界,湖北省东部ESV表现出明显的局部聚集效应,而西部则不显著;(4)湖北省整体ESV空间分异的主导因子为归一化植被指数和气温,西部地区主要受人为影响综合指数的影响,而东部地区受高程的主导。

In view of the problem that regional ecosystem service value(ESV)was mostly analyzed at a single scale and the influencing factors had spatial heterogeneity,based on land use data from 1980 to 2020,this paper analyzed the spatiotemporal changes and the multiscale spatiotemporal pattern characteristics of ESV under land use changes in Hubei Province,and discussed the influencing factors of spatial differentiation of ESV by using ecosystem service value evaluation model,spatial autocorrelation analysis,and geographic detector.The results showed that:(1)From 1980 to 2020,cropland and unused land showed a decreasing trend,built-up land and water increased,and forestland and grassland remained relatively stable;(2)In the past 40 years,ESV in Hubei Province increased by 45.983 billion yuan,and water was the contributor to the increase of ESV;(3)Through the multiscale global spatial autocorrelation analysis in Hubei Province,it was found that the spatial agglomeration of ESV at 7 km grid scale was the most significant.Local spatial autocorrelation analysis showed that,with Xiangzhou-Yidu as the boundary,ESV exhibited significant local clustering effect in the eastern region of Hubei Province,while the western region was not significant;(4)The dominant factors of ESV spatial differentiation throughout Hubei Province were normalized difference vegetation index and temperature.The western region of Hubei Province was mainly influenced by human active index,while the eastern region was dominated by the elevation.