干旱区内陆艾比湖流域平原区景观生态安全评价研究

在构建基于景观尺度的生态安全评价模型基础上,分析了1990-2005年干旱区内陆艾比湖流域平原区的景观生态安全变化特征。结果表明:研究区景观生态安全状况可以分为3个层次,并以河流、湖泊及沼泽为主的湿地景观所在区域的生态安全程度相对较高。1990-2005年,研究区生态安全状况呈现"V"字型变化趋势,其中生态安全评价指数相对较低区域的面积所占比例呈现先增加后减少、总体上趋于增加的状态;而生态安全指数相对较高区域的面积所占比例呈现先减少后增加、总体上趋于减少的状态。

Assessment on the Ecological Security in the Plain Area of the Ebinur Lake Basin at Arid Regions Inland

Based on built assessment model of ecological security belonging under landscapes scale, the paper analyzed change characters of landscapes ecological security in the plain area of the Ebinur Lake basin at arid region inland from 1990 to 2005. The result showed landscapes ecological security status in the studied region was divided into three layers and ecological security degree with relatively high was wetland landscapes including river, lake and marsh. From 1990 to 2005 years, the changes of ecological security conditions show a ＂V＂ - shaped trend. The proportions of regions with relatively lower indices is increased at first, then decreased, and present an increased trends overall. While, the proportions of regions with relatively high indices is decreased at first, then increased, and present a decreased trends overall.