Spatiotemporal Variation and Driving Factors of Ecosystem Services in Dawen River Basin
To protect watersheds and benefit from the ecosystem services they provide,it is necessary to identify spatiotemporal changes in ecosystem services and their primary driving forces.In this study,four ecosystem services:habitat quality,water yield,carbon storage and soil retention were as-sessed in the Dawen River basin using In VEST(Integrated Valuation of Environmental Services and Tradeoffs)models,and Pearson correlation analysis was applied to analyze synergistic relationships among the ecosystem services.The factors driving ecosystem services were explored with Geographic detectors.The study was based on data on land use,geography,climate,the normalized difference vegetation index(NDVI),soil,population density,and GDP of the Dawen River basin in 2000,2010,and 2020.Results show that:(1)Farmland and construction land were the primary land use types in the basin.Farmland,forest and grass lands decreased during 2000-2020,while construction land in-creased.(2)There was little temporal change in the value of comprehensive ecosystem services(CES)during 2000-2020,but marked spatial heterogeneity throughout the basin.The higher ecosys-tem service values were mainly in Mount Tai(north),Culai Mountain(central)and Xinfu Mountain(east).The lower values were mainly in the urban areas of Taian City and Xintai City,with intense human activity and poor habitat quality.(3)Habitat quality decreased,but water yield increased from 6xl08 m3 in 2000 to 19.2×108 m3 in 2020.Carbon storage remained stable,at 9.19×107 t during the investigation period.Soil retention decreased and then increased,with values of 3.22× 108(2000),2.86×108(2010)and 4.33x108 t(2020).A tradeoff was observed between water yield and carbon stor-age,while the remaining ecosystem services were synergistic.(4)The spatial pattern of CES was pri-marily influenced by the natural environmental factors of annual average temperature,elevation,and annual precipitation.The impacts of population density and GDP were relatively small.The results of this study provide a valuable reference for resource conservation and sustainable development in the northern river basins of China.
comprehensive ecosystem service(CES)spatiotemporal variationInVEST modelgeo-graphic detectorDawen River basin
万方数据
维普
