Effect of Land Use Change on the Trade-off Relationship of Ecosystem Services in Southern Lakefront Small Watershed
Taking the Haihun River small watershed of Poyang Lake as the research object,based on remote sensing,climate,soil,DEM and vegetation data,a dynamic analysis of land use changes in the Haihun River small watershed of Poyang Lake in 1984,2008 and 2022 was con-ducted.The InVEST and CASA models were employed to quantify five major ecosystem services,namely water conservation,soil retention,habitat quality,carbon storage and net primary productivity,and to analyze their spatiotemporal variation characteristics.Correlation analysis and trade-off synergy methods were applied to study the trade-offs and synergies among ecosystem services within the region.The result showed that during 1984-2022,the forest land in the watershed decreased by 15.27 km2,while the construction land increased by 17.06 km2.How-ever,the overall land use structure was relatively stable,showing a zonal distribution pattern from west to east of"forest land-arable land-con-struction land".The land use changes were relatively slow from 1984 to 2008,while the land use change was more severe from 2008 to 2022.The pairs of services,water conservation and net primary productivity,soil retention and net primary productivity,habitat quality and net pri-mary productivity,carbon storage and net primary productivity,all exhibited a predominant trade-off relationship in their spatial distribution from 1984 to 2022.The pairs of services,water conservation and habitat quality,soil retention and habitat quality,showed a trade-off relation-ship in their spatial distribution from 1984 to 2008,and a synergistic relationship from 2008 to 2022.From the perspective of ecosystem service structure,arable land demonstrated a composite structure characterized by"soil retention-carbon storage-net primary productivity",forest land showed a two-tier structure of"water conservation-habitat quality".In contrast,other land types mainly exhibited a single-type structure.
Ecosystem servicesLand use changeTrade-offs and synergiesHaihun River small watershed
万方数据
维普
