山区县域土地利用格局变化对生态服务价值的影响——以福建省沙县为例

Impact of Land Use Pattern Change on Ecosystem Service Value of Mountainous County:A Case Study of Sha County,Fujian Province

基于2000年、2015年两期遥感数据,利用ENVI5.3、ArcGIS10.5和Fragstats4.2软件,选取景观格局指数,结合NPP和社会经济系数修正ESV系数,探讨了2000-2015年沙县土地利用格局变化及对生态系统服务价值的影响.结果表明:15年间,沙县耕地、草地面积减少,而建设用地、水体、林地、园地面积增加.其中耕地和草地主要向建设用地和林地转化;林地提供的ESV最多,其中耕地和草地的ESV降低.15年间沙县的总ESV呈上升趋势,增加了83.61亿元,和2000年相比增加了17.11%;生态服务价值和城镇化率、林业总产值相关,其中林业总产值对ESV的影响最大,城镇化率是影响生态服务价值的第二重要驱动因素,说明区域生态服务功能受城镇化发展的影响.研究结果可为县域土地利用管理和生态环境可持续发展提供参考.

Based on the remote sensing data of 2000 and 2015,this paper uses ENVI5.3,ArcGis10.5 and Fragstats4.2 software,selects the landscape pattern index,combines the NPP and the socio-economic coefficient to modify the ESV coefficient,and explores the land use of Shaxian County from 2000 to 2015 Pattern changes and their impact on the value of ecosystem services.The results showed:During 15 years,the area of cultivated land and grassland in Shaxian County decreased,while the area of construction land,water bodies,woodland,and gardens increased.Among them,arable land and grassland are mainly transformed into construction land and forest land.Forest land provides the most ESV,of which cultivated land and grassland have lower ESV.The total ESV of Shaxian County in 15 years has shown an upward trend,an increase of 8.361 billion yuan,an increase of 17.11%compared with 2000.The value of ecological services is related to the urbanization rate and total forestry output value.The total forestry output value has the greatest impact on ESV.The urbanization rate is the second most important driving factor affecting the value of ecological services,indicating that regional ecological service functions are affected by urbanization development.Impact.The research results can provide a reference for county land use management and sustainable development of ecological environment.