安徽农业科学2011，Vol.39Issue(7)：4158-4161,4.
基于主成分分析的曲靖市生态安全评价研究
Principal Component Analysis Based on Ecological Security Evaluation of Qujing city
摘要
Abstract
This paper used the “PSR model” put forward by UN environment programmer (UNEP) and the organization for economic co-operation and development (OECD), based on the theory of ecological security assessment, then, established three levels of 29 ecological safety evaluation index system and used the principal component analysis of Qujing City from 2004 to 2008 to analyze the situation and ecological security evaluation. Results showed that the pressure indicators increased year by year, from - 3.47 in 2004 to 3.64 in 2008. The status indicatot was increasing in rolling-type and it was down 0. 47 index points in 2006 than in 2005. The rest periods were raising and the response index overall showed ascendant trend, especially since 2005 it had the fastest-growing, the highest rate reached 13 1. 72％. The comprehensive index of ecological security was going up from -4. 16 in 2004 to 4.51 in 2008; it also had the lowest value -4.44 in 2006. Meanwhile, the fastest ising year was 2006 to 2007, that was, 154.05％, which presented overall “rise-fall-increased” fluctuation. The sequence of ecological security comprehensive score in each year was 2006 ＜ 2004 ＜ 2005 ＜ 2007 ＜ 2008.关键词
区域生态安全评价/PSR模型/主成分分析/曲靖市Key words
Ecological security evaluation/ P-S-R model/ Principal component analysis/ Qujing city分类
资源环境引用本文复制引用
柏家平,丁伟,李玲琴,于龙..基于主成分分析的曲靖市生态安全评价研究[J].安徽农业科学,2011,39(7):4158-4161,4.基金项目
曲靖师范学院山地生态学和环境学重点实验室资助项目. （）
