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1、生态学报2010,30(2):0421—0428ActaEcologicaSinica最小累积阻力模型在城市土地生态适宜性评价中的应用———以厦门为例3刘孝富,舒俭民,张林波(中国环境科学研究院,北京100012)摘要:将城市土地景观动态模拟为生态保护用地和城镇用地扩张两个过程,建立了以两个过程最小累积阻力差值为基础的城市土地生态适宜性评价方法,可用公式MCR差值=MCR生态保护用地扩张-MCR城市用地扩张表示。当被评价单元的MCR差值<0时,应被划分为适宜生态的用地;当MCR差值>0,应被划分为适宜建设的用地;而当MCR差值=0时,为适宜建
2、设用地和适宜生态用地之间的分界线。以厦门为例,选取已有的城镇用地和生态保护用地作为扩张源,分别从地形、景观类型、水文地质、生态价值、生态敏感性、生态功能6个方面建立了阻力因子评价体系,并运用最小累积阻力差值法将厦门市划分为禁止开发、限制开发、重点开发、22优化开发4个适宜性分区,各区的面积分别为525.3、455.0、340.8、243.9km,生态适宜用地面积总和为980.3km,建设适宜用2地面积总和为584.7km。关键词:城市生态;生态适宜性;最小累积阻力模型;厦门Researchonapplyingminimalcumulative
3、resistancemodelinurbanlandecologicalsuitabilityassessment:asanexampleofXiamenCity3LIUXiaofu,SHUJianmin,ZHANGLinboChineseResearchAcademyofEnvironmentalSciences,Beijing100012,ChinaAbstract:Assumedtwoprocessesoftownlandandecologicalprotectedlandexpandingtosimulateurbanlandscap
4、edynamic,thispaperestablishedanecologicalsuitabilityassessmentmethodbasedonminimumcumulativeresistancemargin,whichcanbeexpressedbyusingtheformulaofMCRmargin=MCRecologicalprotectedlandexpansion-MCRurbanlandexpansion.Whenonepixel’sMCRmargin<0,itshouldbedividedintoeco2appropri
5、ateland;Instead,whenMCRmargin>0,itshouldbeclassifiedasthelandsuitableforconstruction;andwhenMCRmargin=0,itshouldberegardasthewatershedbetweeneco2appropriateandconstructionsuitableland.AsanexampleofXiamen,thispaperselectedtheexistingtownlandandeco2protectedlandasthesourcesof
6、expanding,andestablishedasystemtocalculateresistancefromsixaspects:terrain,landuse,hydrogeology,ecologicalvalue,ecologicalsensitivity,andecologicalfunction.Basedonthementionedmethod,thispaperdividedXiamenintofourdevelopmentalzones:prohibited,restricted,keyandoptimizedareas,
7、whichwere525.322222km,455.0km,340.8km,243.9km,respectively.Thelandsuitableforeco2protectionwas980.3km,whilesuitable2forconstructionwas584.7km.KeyWords:urbanecology;ecologicalsuitability;minimumcumulativeresistancemodel;XiamenCity20世纪以来,随着城市化进程的加快,城镇用地得到了前所未有的扩张,这种扩张迎合了人口与经济
8、的基金项目:中国环境科学研究院中央级公益性科研院所基本科研业务专项资助项目(2007kyyw28)收稿日期:2008210206;修订日期:20082122163通
