南昌市蓝绿空间格局对生态系统服务价值的影响OA

Rapid urbanization has triggered severe fragmentation of blue-green spaces and landscapes,substantially impairing their ecological service capacities.Exploring the spatio-temporal evolution of blue-green landscape patterns and the responsive characteristics of e-cosystem service value(ESV)to such variations is critical for optimizing regional ecological spatial layouts and precisely boosting ESV.Taking Nanchang,an international wetland city,as the research area,this study integrated landscape pattern metrics,the value equivalent factor method and geographically weighted regression(GWR)to quantify spatiotemporal variations in landscape configurations and ESV across 2000-2024 and further clarified their correlative mechanisms.The results showed that:1)Blue-green spaces shrank by 128.78 km2(a 5%decline)over the 25-year period,presenting a spatial pattern of central shrink-age and peripheral agglomeration;2)Significant regional differentiation existed in blue-green landscape configurations:ecological barrier zones exhibited high aggregation,strong connectivity,low fragmentation and simple patch shapes,while central urban areas dis-played opposite characteristics;3)ESV followed a decreasing-then-increasing trajectory,dropping from 730.5 billion CNY in 2000 to 690.8 billion CNY in 2010 before rebounding to 704.2 billion CNY in 2024,with blue spaces contributing more than 70%of total ESV;4)Land-scape patterns exerted spatially heterogeneous effects on ESV:Contagion Index(CONTAG)and Cohesion Index(COHESION)exerted positive impacts,whereas Patch Density(PD)produced negative effects.The positive correlation of Largest Patch Index(LPI)with ESV was mainly concentrated in the eastern and western ecological barrier zones,whereas Land-scape Shape Index(LSI)showed the inverse spatial response.