摘要
资源型城市通过资源开采驱动城市快速发展,同时通过生态恢复维持生态系统稳定。探究典型人类活动对资源型城市生态系统服务的消极和积极影响对于可持续城市建设具有重要意义。以鄂尔多斯市为例,基于1990—2018年土地利用/覆盖、NDVI等数据,修订了生态系统服务价值计算方法,量化了区域生态系统服务价值的时空格局,进而评估了人类活动过程对生态系统服务的影响。研究结果表明,研究时段内鄂尔多斯市城镇建设用地、林地和草地面积总体增加,耕地及未利用土地面积减少。区域生态系统服务总价值总体呈上升趋势,从1990年的2312.24亿元上升至2018年的2421.38亿元,增加了4.72%。2000年以后鄂尔多斯市退耕还林、未利用地植被恢复等措施使得生态系统服务价值增加了113.53亿元,同期城镇建设用地扩展占用生态生产用地导致生态系统服务价值减少了91.36亿元,生态建设的积极影响大于城镇建设用地扩展的消极影响。
Resource-based cities experience rapid urban development by resource mining and maintain ecosystem stability by ecological restoration.Assessing negative and positive impacts of typical human activities on ecosystem services of resource-based cities is of great significance for sustainable urban development.Taking Ordos,Inner Mongolia as an example,this study improved the calculation method of ecosystem service value(ESV)based on the land use/cover and normalized difference vegetation index(NDVI)data.Then the spatiotemporal patterns of regional ESV were quantified from 1990 to 2018.We selected the urban expansion and ecological restoration as the typical human activities.The positive and negative impacts of the human activities on the ESV were then evaluated.Results showed that the grassland and unused land covered more than 80%of the total area in Ordos City.The urban land area indicated a general increasing trend mainly by occupying cropland and grassland,with an annual increasing rate of 0.36%,4.34%and 10.27%during 1990—2000,2000—2010 and 2010—2018,respectively.The woodland area showed a continually growth during the three periods and the grassland area increased since 2000.Both of the increase were mainly converted from the unused land.The total ESV of Ordos City generally increased from 231.22 billion yuan in 1990 to 242.14 billion yuan in 2018 with an increase rate of 4.72%.Driven by the land use/cover changes,the spatial pattern of ESV change varied in time and space.The hotspots with significant ESV increase moved from northwest of Hangjin and Donsheng District during 1990—2000 to south of Hangjin and Yijinhuoluo during 2000—2010 and southwest of Hangjin during 2010—2018.The cold spot with significant ESV decline were mainly located in the middle of Hangjin during 1990—2000 and 2000—2010,in Dalate-Dongsheng-Yijinhuoluo belt.After the year of 2000,the returning cropland to forests and the restoration of unused land in Ordos City made an ESV increase of 11.35 billion yuan.And meantime,the oc
作者
苏宁
丁国栋
杜林芳
杨光
雷燕慧
赵媛媛
SU Ning;DING Guodong;DU Linfang;YANG Guang;LEI Yanhui;ZHAO Yuanyuan(Key Laboratory of State Forestry Administration on Soil and Water Conservation,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Yanchi Research Station,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Beijing Energy Conservation and Environmental Protection Center,Beijing 101160,China;College of Desert Control Science and Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China)
出处
《生态学报》
CAS
CSCD
北大核心
2022年第16期6543-6553,共11页
Acta Ecologica Sinica
基金
国家自然科学基金面上项目(41971130)
中央高校基本科研业务费专项资金(PTYX202122,PTYX202123)。
