异龙湖流域土地利用和生态系统服务价值动态评估OA

[Objectives]Assessing the dynamic changes of the land-use patterns of the Yilong Lake Basin(YLB),and quantifying the ecosystem service value(ESV)variations responding to land-use change.[Methods]Based on the land-use data of YLB and an ESV accounting system,we evaluated the dynamic changes in land-use and ESV from 2009 to 2022.[Results]The rate of change in different land-use types during the study period ranked as unused land>garden land>grassland>construction land>crop land>water body>forest land.The comprehensive index of land-use degree of YLB was 236～238.During the study period,38.4%of the basin area experienced land use transitions,with transition areas of 382 ha,13,703 ha,and 253 ha for the periods 2009-2014,2014-2019,and 2019-2022,respectively.The main type of land-use transitions included forest land to garden land;cropland to forest land;cropland to garden land;cropland to construction land,forest land to cropland,grassland to forest land,and forest land to construction land.The total ESV of YLB was estimated as 1.9×109 Yuan with a unit value of 5.3×104 Yuan/hm2.During the whole study period,the total ESV of YLB showed an increasing trend.Among the specific ecosystem service functions,hydrological regulation,climate regulation,and biodiversity were the top 3 ESV contributors in YLB.The ESV of different land-use types ranked as waterbody>forest land>garden land>cropland>grassland>unused land>construction land.[Conclusion]Production activities and ecological environment governance in the YLB have dynamically altered land-use types,exerting varying impacts on the total ESV and the value of different ecosystem service functions.The results provided a valuable reference for the rational planning and development of land resources eco-environmental protection in the basin.