基于改进物元可拓模型的贵州草海湿地生态安全评价

Evaluation of Ecological Security in Caohai Wetlands of Guizhou Based on the Improved Matter Elements and Extendable Set

以贵州草海湿地为研究对象,结合实地调查数据和社会经济统计数据,筛选出20个生态安全评价指标,根据PSR概念模型构建草海湿地生态安全评价指标体系,运用改进物元可拓模型,构造标准物元矩阵和节域物元矩阵,利用权变系数法确定指标权重,并计算研究区生态安全状况与生态安全等级的关联度,根据关联度大小评判研究区生态安全状况隶属级别,并将结果划分为安全、较安全、预警、脆弱、危险五个级别。

Combining the field data and socio-economic statistic data,Caohai wetlands ofGuizhou was taken as a research object to screen out 20 ecological security assessmentindexes and build Caohai wetland ecological security evaluation index system according to PSR conceptual model. The improved matter elements and extendable set were used toconstruct standard elements matrixand segment field matter elements matrix. Thecontingency coefficient method was adopted to determine indexes weight and calculate thecorrelation degree between ecological security status and ecological security grade in study area,which defined ecological security status grade and divided the results into 5 grades ofsecurity,relative security,warning,fragility and danger.