2008~2016年鄱阳湖生态经济区生态系统服务价值的时空变化研究

鄱阳湖生态经济区是中国重要生态功能区和世界自然基金会划定的全球重要生态区，2009年开始建设，目前已完成首要阶段的建设工作。基于土地覆被遥感解译数据，利用生态价值评估模型及GIS空间统计方法，分析鄱阳湖生态经济区2008~2016年间生态系统服务价值时空格局及动态演化。结果表明，鄱阳湖生态经济区土地利用/覆被方式以耕地、林地和草地为主，8年间区内草地和建筑用地面积明显增加，水域面积减少加剧，生态系统服务价值总体呈减少趋势，其中减少最明显的是林地和水域系统价值。水源涵养和土壤保持是鄱阳湖生态经济区最主要的生态系统服务功能，两者合计占比38%以上，但食物生产、水源涵养与废物处理的各单项生态服务价值下降比例较多。生态系统服务价值年均减少率超过20%的区域主要在城市地区，从空间分布来看，南部区域生态服务价值增长具有优势，尤其在2012~2016年间总的优势更为明显。

STUDY ON THE SPATIAL AND TEMPORAL CHANGES IN ECOSYSTEM SERVICES VALUE IN POYANG LAKE ECOLOGICAL ECONOMIC ZONE FROM 2008 TO 2016

As China's important ecological function zone and the world's important ecological zone designated by the World Wide Fund for Nature,Poyang Lake Ecological Economic Zone (PLEEZ) has completed the first phase of construction since 2009.Based on the land cover data extracted from remote sensing images,we analyzed spatial and temporal patterns in the Poyang Lake Region(PLR)from 2008 to 2016 using ecological value assessment model and GIS spatial statistics method.The results showed that the land use and land cover in PLEEZ is mainly cultivated land,forest land and grassland.In the study period from 2008 to 2016,the area of grassland and construction land has increased,while the water area has decreased sharply.The ecosystem service value (ESV) in PLEEZ is decreasing generally,obviously the ESV of forest land and water area.Water conservation and soil conservation are the most important ecosystem services in PLEEZ,with a contribution-more than 38％;while the value of individual ecological services of food production,water conservation and waste treatment decreased rapidly.The regions with average annual reduction rate of ESV more than 20％ are mainly in urban areas.Spatially,the ESV in the southern region has a growth increase,and the overall increase is more obvious especially in the 2012～2016 period.