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基于集对分析和主成分分析的吉林西部生态承载力演变研究
Authors
刘景双
王明全
王金达
Publication date
1 January 2009
Publisher
Abstract
利用集对分析(SPA)和主成分分析(PCA)方法对吉林省西部生态承载力(ECC)演变规律与驱动因素进行了分析。通过PCA获取影响ECC的3个主成分并利用各主成分构建ECC评价框架;通过SPA求得ECC对最优指标集的贴近度,利用贴近度变化表示ECC的优劣程度。结果表明:19952004年研究区ECC整体呈上升趋势,其贴近度从0.4300上升到0.5012,但波动性较强。系统经济效率上升是ECC提高的主要原因,水资源是ECC波动的首要影响因素,也是限制ECC提高的主要因素。吉林省西部所承载的人口和经济水平有所上升,但也造成资源的大量消耗和生态系统严重退化,资源环境指标贴近度有所下降。若不采取有效应对措施,脆弱的资源环境系统将会对未来ECC提高产生较大限制作用
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Northeast Institute of Geography and Agroecology, Chinese Academy Of Sciences
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Last time updated on 21/04/2018