The Yellow River water recharge area in Gannan is an important ecological barrier in the upper reaches of the Yel-low River.The stable provision of ecosystem services is essential for the sustainable development of the Yellow River Basin.Based on land-use changes from 2000 to 2020,the equivalence factor is corrected by combining net primary productivity(NPP)data and socio-economic factors,the ecosystem services value(ESV)of the study area is calculated for five periods.Through methods such as spatial autocorrelation and centroid model,this study investigates the spatiotemporal evolution char-acteristics and spatial heterogeneity of ESV from 2000 to 2020.The results show that from 2000 to 2020,the land use/cover change(LUCC)types in the Yellow River water recharge area of Gannan were mainly grassland,woodland and cultivated land.The areas of grassland,woodland,construction land,and waters have increased,while cultivated land has decreased by 448.57 km2 at a rate of change of 19％.From 2000 to 2020,the average ESV was 408.785 1×108 yuan.The main focus was on regulation services,with hydrological regulation and climate regulation accounting for about 48.69％of the total ESV.Grassland and woodland made the greatest contribution to ESV and are key land types for the total value of ecosystem services.The size of the water area continued to increase,affecting the rise in ESV for water production services,with a cu-mulative increase of 3.401 3％.Land-averaged ESV showed a strong positive spatial correlation,and spatial clustering was generally stable.The spatial distribution of woodland had an important influence on the spatial pattern of ESV,with areas of higher ESV overlapping with areas of concentrated woodland,while areas of lower ESV were dominated by construction and cultivated land.The research results reveal the spatiotemporal pattern evolution of ESV in the Yellow River water re-charge area of Gannan under the background of LUCC changes.The results can provide a basis for spatial planning,eco-nomic development,ecological environmental protection and management in the region,contributing to the high-quality de-velopment of the basin.
关键词
生态系统服务价值/土地利用变化/植被净初级生产力/时空演变
Key words
ecosystem service value/land use change/net primary productivity/spatiotemporal evolution
维普
万方数据