Analysis on spatio-temporal distribution characteristics and tradeoff-synergy of ecosystem services in the FAST Tranquility Zone
Based on the InVEST and CASA models,an assessment was conducted on four ecosystem services—Net Primary Productivity(NPP),water conservation,soil retention,and habitat quality in the FAST Tranquility Zone from 2000 to 2020.This involved calculating these services,analyzing their spatiotemporal variations at different scales,identifying hotspots of ecosystem services,and using tradeoff-synergy index and Random Forest models to reveal the relationships and intensities of tradeoff/synergy among these services and with their driving factors.The results showed that:(1)From 2000 to 2020,the overall ecosystem services in the FAST Tranquility Zone demonstrated an increasing trend,with NPP rising by 730.544gC/m2,water conservation by 5.925mm,habitat quality score by 0.007,and soil conservation by 0.295t/km2.(2)There were notable differences among the circles;the core area showed the fastest increase and had the best service functionality,followed by the remote areas with significant ecological improvement,and lastly the middle area where ecological restoration was relatively slow.(3)Among land use types,woodland and grasslands had the greatest promotional effect on the ecosystem services in the study area.(4)Overall,the ecosystem service hotspots transitioned from class I and II hotspots to non-hotspot areas,class III hotspots,and class IV hotspots.(5)The relationships among the four ecosystem services within the area were predominantly synergistic,with increasing synergy over time,and in some regions,tradeoff effects were evident between water conservation and both soil conservation and NPP.(6)The main driving factors for the tradeoff/synergy relationships among the four ecosystem services in the FAST Tranquility Zone were precipitation,evapotranspiration,sensitivity to rocky desertification,slope,and human activity intensity.
ecosystem servicescircle differencesspatio-temporal evolutiontradeoff-synergyInVEST modelFAST tranquility zone
万方数据
维普
