[Ecological Management Zoning Based on Ecosystem Service Supply/Demand Ratio and Land Use Intensity Threshold...

Studying the relationship between ecosystem service supply-demand ratios and land use intensity and conducting ecological management zoning plays an important role in promoting precise ecological environment management. Taking the central Yunnan urban agglomeration as an example， the transformation mode of land use transformation was visualized through land use intensity mapping （IM model）. Then， the supply/demand indicators of four ecosystem services， namely， water yield， carbon sequestration， food product， and habitat quality， were quantified， and their supply-demand ratios were calculated on a grid scale. The Spearman's coefficient and Moran's I index were used to explore the trade-off/synergy characteristics between land use intensity and ecosystem service supply-demand ratio. Finally， the coupling threshold and four-quadrant methods were used to partition the study area for ecological management. The results showed that： ① Cropland→construction land showed systematic tendency； forestland→unutilized land， water→forestland， etc.， showed systematic inhibition； and these features of land use conversion were in line with the rule of land use change， which to a certain extent illustrated the feasibility of land use intensity mapping. ② Carbon sequestration and habitat quality both showed a spatial distribution pattern of high in the west and low in the east； the high value areas of water production were concentrated in the southwest and northeast. The high value areas of food production services were mainly distributed in areas with flat terrain or sufficient water sources. ③ Food product， water yield， and land use intensity showed a synergistic relationship， and the coordinating relationship tended to weaken， while carbon sequestration， habitat quality， and land use intensity showed a trade-off relationship between them， and the trade-off relationship tended to strengthen. ④ The central Yunnan urban agglomeration was divided into eight ecological management zones， with ecological development potential zones and urban development restricted development zones as the main research subzones. Combined with the spatial distribution of land use intensity and ecosystem service supply-demand ratio， differentiated control measures are proposed， and the results of the study can provide scientific basis for the sustainable development， ecological environmental protection， and rational development and utilization of land in the central Yunnan urban agglomeration.