为了揭示沙颍河流域生态系统服务价值(ESV),以沙颍河及其支流所流经的各地级市为研究区,利用PLUS(Patch-generating Land Use Simulation Model,PLUS)模型模拟不同情景下土地利用,采用当量因子法进行ESV评估.结果表明:2019 年研究区用地类型以耕地为主,而建设用地面积明显增长;仅耕地保护情景下 2029 年ESV有所提高,表明耕地对ESV的主导作用;耕地和林地的生态价值变化度大于1,表明其对该流域ESV变化影响大.该研究为沙颍河流域生态保护和国土空间规划提供科学依据.
Ecosystem Service Value Evaluation in the Shaying River Basin Based on the PLUS Model
To reveal the ecosystem service value(ESV)of the Shaying River Basin,this study focuses on the prefecture-level cities traversed by the Shaying River and its tributaries.Utilizing the Patch-generating Land Use Simulation(PLUS)Model,land use changes were extracted,and the land use status in 2029 was simulated under different scenarios:natural development,ecological protection,and cultivated land protection.Subse-quently,the equivalent factor method was applied to assess the ESV in the Shaying River Basin.The key find-ings are as follows:In 2019,the basin was predominantly composed of cultivated land,accompanied by a notice-able increase in construction land.Notably,only under the cultivated land protection scenario does ESV in 2029 exhibit an increase compared to 2019,indicating the pivotal role of cultivated land in maintaining ESV.Further-more,the degree of change in the ecological value for both cultivated land and forest land exceeds 1,indicating a considerably impact on ESV changes.These findings provide valuable scientific guidance for ecosystem conser-vation and territorial spatial planning in the Shaying River Basin.
the Shaying Riverthe PLUS modelland use changeecosystem services values
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