探究安宁河流域生态系统服务价值(ecosystem service value,ESV)的地形梯度分布规律及其空间分异的驱动因子,对流域实施因地制宜的国土空间规划和生态环境保护策略具有积极意义.利用2000-2020年高精度土地利用数据,通过CA-Markov模型预测流域2030年土地利用结构,分析2000-2030年安宁河流域ESV变化,并借助地形因子和地理探测器分析ESV的地形梯度分布特征和空间分异驱动因素.结果表明:(1)2000-2020年安宁河流域ESV减少0.51％,2020-2030年预计受林地锐减影响,ESV将继续减少;(2)林地贡献了安宁河流域74％以上的ESV;气候调节和水文调节是ESV贡献率突出的生态系统服务功能,合计达47.79％以上;(3)总ESV和各项生态系统服务功能的ESV随海拔、坡度和地形起伏度增大呈先增后减的分布特征,坡向上分布较均匀;其中2 300～2 579 m海拔、30.92°～35.73°坡度、507～602 m地形起伏度和西坡分布最多;(4)流域ESV空间分异受自然和经济因子的共同作用影响,其中地形起伏度为主导因子.
Terrain Gradient Differentiation of Ecosystem Service Values and Driving Factors in the Anning River Basin
The Anning River basin is a critical water resource in southwestern Sichuan Province,and the sustainable development of its ecosystem is important for promoting local economic growth.In this study,we explored the terrain gradient distribution and spatial differentiation driving factors of ecosystem ser-vice values(ESV)in the basin using the geodetector statistical package.Based on high-precision land use data from 2000 to 2020,we predicted the land use structure of the basin in 2030 using the CA-Markov model and analyzed the changes of ESV in the Anning River basin from 2000 to 2030.This study pro-vides important support for land use planning and ecological environment protection that is adapted to lo-cal conditions.Results show that:(1)The ESV in the Anning River basin decreased from 34.392 billion yuan in 2000 to 34.208 billion yuan in 2010,and then increased to 34.218 billion yuan in 2020.This is an overall decrease of 0.51％,but the sharp decrease in forest land expected from 2020 to 2030 would de-crease the ESV by an additional 3.71％(1.270 billion yuan).(2)Forest land contributed more than 74％of ESV in the Anning River basin,followed by surface water(＞6.58％),grass land(＞6.07％)and farmland(＞8.98％).In terms of ecological serve functions,climate regulation and water regulation were the pri-mary contributors to the ESV(＞47.79％).(3)A total of 17 natural and economic factors were included in the analysis of factors driving the ESV.We found that the total ESV,and the ESV of each ecosystem ser-vice,initially increased and then decreased with increasing elevation,slope and degree of relief,but was more evenly distributed with slope aspect.The largest contribution to ESV occurred at an elevation of 2 300-2 579 m,a slope of 30.92-35.73° and a terrain relief of 507-602 m on slopes that face west.(4)Spatial differentiation of ESV in the basin tended to be affected by single natural and economic factors and their interactions,and terrain relief was the dominant factor.
ecological service value(ESV)terrain gradientdriving factorAnning River basin
万方数据
维普
