Estimation of Ecosystem Service Value in the Upper Yangtze River Region Using the GeoSOS-FLUS Model
To explore the spatiotemporal variation characteristics of ecosystem service value(ESV)in the Upper Yangtze River region and its future trends,this study is based on three periods of land use and driving force data from 2000 to 2020.The GeoSOS-FLUS model is employed to simulate land use changes and the spatiotemporal evolution trends of ecosystem serv-ice value in four scenarios for the year 2030.Additionally,the study analyzes the characteristics of ecosystem service value and land use under different scenarios in the Upper Yangtze River region.The results showed that:(1)Using the GeoSOS-FLUS model,the simulation of future land use in the Upper Yangtze River region shows good model accuracy,with a Kap-pa coefficient of 0.83 and a FoM value of 0.068.(2)The Upper Yangtze River region is primarily characterized by grass-lands and forests,which together account for 70％of the total area.From 2000 to 2020,forest land,water area,and con-struction land exhibited an increasing trend,with construction land area increasing by 148.66％.Conversely,cultivated land and grassland areas showed a decreasing trend,and the area of unused land first stabilized and then increased.(3)The total ESV in the Upper Yangtze River region from 2000 to 2020 exhibited an inverted"V"pattern.By 2030,total eco-system service value is expected to increase in all scenarios compared to 2020,with the ecological protection scenario yielding the highest total ecosystem service value of 89 078.94 million yuan.The changes in ecosystem service value for va-rious land types align with the trends in their respective areas.In terms of primary ecosystem service functions,the rank of ecosystem service value from highest to lowest is as follows:regulating services,supporting services,provisioning services,and cultural services.The secondary type of water resource provisioning ecosystem service value has the largest variation,increasing by over 35 billion yuan in all scenarios.(4)In the study area,the unit area ecosystem service value in various years predominantly falls into the medium and high ranks,with pronounced spatial differentiation characteristics.Notably,the central mountainous region of the Upper Yangtze River and certain areas of the Tibetan Plateau demonstrate higher unit area ecosystem service values,whereas the municipalities of Sichuan and Chongqing show lower and low rank areas con-centrated in specific locations.Therefore,while promoting rapid economic development,it is necessary to enhance compen-sation and maintenance for the ecological service functions of urban built-up areas and expanding new districts.
Land useEcosystem service valueGeoSOS-FLUS modelSpatiotemporal characteristicsUpper Yan-gtze River region
万方数据
维普
