生态学报2017，Vol.37Issue(19)：6355-6369,15.DOI:10.5846/stxb201607081406
基于乡镇尺度的土地生态安全时空格局评价研究——以博尔塔拉蒙古自治州为例
Spatial-temporal pattern of land ecological security at a township scale in the bortala mongolian autonomous prefecture
摘要
Abstract
Regional land ecosystem is facing deterioration from the rapid growth of urbanization.In order to promote sustainable development of the land ecosystem,it is necessary that we evaluate regional land ecological security.Many researchers have studied and evaluated for regional land ecological security;however,most of the evaluation was based on watershed and county scale,and few researches focused on the township scale.In this study,Bortala Mongolian Autonomous Prefecture (i.e.Bortala) in Xinjiang Uygur Automous region was taken as study area,and Remote Sensing (RS),Geographical Information System (GIS),and Global Position System (GPS) technologies were adopted to analyze temporal and spatial perspectives of land ecological security in Bortala.On the basis of the natural geographic features and socioeconomic situation of Bortala,we constructed the pressure-state-response (P-S-R) land ecological security evaluation model (township scale) in Bortala.Based on the two period's data of statistic yearbook and remote sensing in 2011 and 2014,we first constructed the index system,using 25 indices reflecting regional P-S-R.The entropy weight and analytic hierarchy process methods were used to determine the indices weight of Bortala P-S-R model.Finally,the land ecological security index of Bortala was calculated with the data obtained from the P-S-R model by GIS Grid.The results show that:(1) The land ecological security index had deteriorated from 2011 to 2014 in Bortala.Between 2011 and 2014,2555.33 km2 of level III(grade of security) transferred to level IV,which deteriorated areas mainly concentrated in Wenquan County;1356.53 km2 of level V transferred to level IV,which improved areas concentrated in the Mangding town and Tuotuo town of Jinghe County.(2) The land ecological security index of most towns was at level III in Bortala,which respected the ecological structure of these towns were not stable.(3) The spatial difference of land ecological security index was obvious in Bortala,the worst places were located in the eastern desert,and the best places were concentrated in the central oasis and lake.The evaluation results and major environment problems may help the local government finding inappropriate and inadequate for Bortala development.Bortala Prefecture is a drought-prone and ecologically vulnerable region in the Northwest region.Temporary land use regulation cannot guarantee long-term regional ecological balance and security.In this study,we recommend increased attention on regional ecological protection and sustainable development for villages and towns.关键词
乡镇尺度/土地生态安全/P-S-R模型/博尔塔拉蒙古自治州Key words
township scale/land ecological security/P-S-R model/Bortala Mongolian Autonomous Prefecture引用本文复制引用
于海洋,张飞,曹雷,王娟,杨胜天..基于乡镇尺度的土地生态安全时空格局评价研究——以博尔塔拉蒙古自治州为例[J].生态学报,2017,37(19):6355-6369,15.基金项目
新疆维吾尔自治区青年科技创新人才培养工程项目(2013731002) （2013731002）
国家自然科学基金项目(41361045,41130531) （41361045,41130531）
新疆绿洲生态(教育部省部共建)重点实验室开放课题(XJDX0201-2012-01) （教育部省部共建）
