黄土高原典型脆弱区生态安全多尺度评价

应用生态学报

黄土高原典型脆弱区生态安全多尺度评价

刘世梁¹;郭旭东²;连纲³;王静²

¹北京师范大学环境学院水环境模拟国家重点实验室，北京 100875；²中国土地勘测规划院国土资源部土地利用重点实验室, 北京 100035；³中国科学院生态环境研究中心，北京 100085

收稿日期:2006-06-05 修回日期:1900-01-01 出版日期:2007-07-16 发布日期:2007-07-16

Multi-scale ecological security evaluation of typical fragile areas in Loess Plateau.

LIU Shi-liang¹;GUO Xu-dong²; LIAN Gang³; WANG Jing²

¹State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;²Key Laboratory of Land Use of Land & Resources Ministry, Institute of Land Surveying & Planning,Beijing 100035, China;³Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China

Received:2006-06-05 Revised:1900-01-01 Online:2007-07-16 Published:2007-07-16

摘要/Abstract

摘要： 区域生态安全目前受到广泛重视，生态脆弱区的生态安全评价及驱动因子研究尤为重要.以黄土高原生态脆弱区为研究对象，从市域和县域两个尺度上，分析案例区的生态安全驱动指标，评价其生态安全状况.选择了榆林市和横山县两个行政单元，针对区域特征，构建了不同尺度上的生态安全指标体系，利用层次分析法，对不同尺度上生态安全的空间分异进行了研究.结果表明，榆林市12个县的生态安全水平存在一定程度的差异，基本上是东北低，西南高.横山县总体也是北部、东北部生态安全水平低，而西南部高生态安全水平在不同尺度上存在着差异.不同尺度上气候、地貌因子所占的权重不大，而人类干扰因子所占的权重较大.

关键词: 柠檬酸, 草酸, Pb, Cd, 土壤化学行为

Abstract: Regional ecological security has been paid more and more attention, and it’s of special significance to study the ecological security and its driving factors in ecological fragile areas. In this paper, the ecological security and its driving factors in typical fragile regions in Loess Plateau were analyzed at district and county scales. Yulin District and Hengshan County were taken as the cases, and ecological security index system was constructed to assess the security levels of the two regions. By using AHP method, the spatial differentiation of ecological security at different scales was studied, and the results showed that there existed differences among the twelve counties in Yulin District, with the security level being generally higher in southwest and lower in northeast. Similar tendency was observed in Hengshan County, with the security level being lower in north and northeast, and varying among different scales in southwest. Climate and topography were the weak driving forces, while human disturbances had great influence on ecological security.

Key words: Citric acid, Oxalic acid, Pb, Cd, Soil chemical behavior

刘世梁¹;郭旭东²;连纲³;王静². 黄土高原典型脆弱区生态安全多尺度评价[J]. 应用生态学报.

LIU Shi-liang¹;GUO Xu-dong²; LIAN Gang³; WANG Jing² . Multi-scale ecological security evaluation of typical fragile areas in Loess Plateau. [J]. Chinese Journal of Applied Ecology.

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