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Quantitative analysis of the dynamic change and spatial differences of the ecological security: a case study of Loess Plateau in northern Shaanxi Province

查看全文 作　　者：LI Jing REN Zhiyuan ZHOU [1]Zixiang 高影响力作者 机构地区：[1]College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710062, China高影响力机构 出　　处：《Journal of Geographical Sciences》索引2006年第16卷第2期,共6页高影响力期刊 基　　金：National Natural Science Foundation of China, No.40371003; Ministry of Education of China, No.01158; Master Research Project of Shaanxi Normal University 摘　　要：Using the theory and method of the ecological footprint, and combining the changes of regional land use, resource environment, population, society and economy, this paper calculated the ecological footprint, ecological carrying capacity and ecological surplus/loss in 1986-2002 on the Loess Plateau in northern Shaanxi Province. What is more, this paper has put forward the concept of ecological pressure index, set up ecological pressure index models, and ecological security grading systems, and the prediction models of different ecological footprints, ecological carrying capacity, ecological surplus and ecological safety change, and also has assessed the ecological footprint demands of 10,000 yuan GDP. The results of this study are as follows: (1) the ecological carrying capacity in northern Shaanxi shows a decreasing trend, the difference of reducing range is the fastest; (2) the ecological footprint appears an increasing trend; (3) ecological pressure index rose to 0.91 from 0.44 during 1986-2002 on the Loess Plateau of northern Shaanxi with an increase of 47%; and (4) the ecological security in the study area is in a critical state, and the ecological pressure index has been increasing rapidly. 关 键 词：陕西 黄土高原 区域生态安全 动态变化 空间差异定量分析
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