长江三角洲生态用地破碎度及其城市化关联  

Ecological Land Fragmentation and Its Connectivity with Urbanization in the Yangtze River Delta

作　　者：苏伟忠[1] 杨桂山[1] 甄峰[2] 

机构地区：[1]中国科学院南京地理与湖泊研究所,南京210008 [2]南京大学城市与区域规划系,南京210093

出　　处：《地理学报》2007年第12期1309-1317,共9页Acta Geographica Sinica

基　　金：国家自然科学重点基金项目(40435013)~~

摘　　要：破碎化是当今地表自然景观演化的重要形式。基于县(区)行政单元,利用GIS技术和景观生态方法,定量探讨了长江三角洲生态用地破碎分区及其城市化关联,研究结论有:①建立了生态用地破碎度综合模型,并与城市化规模和空间构型等参数聚类,将全区划为2个高破碎区、3个中等破碎区和2个低破碎区;②基于区县尺度和30m分辨率影像的生态用地破碎度是城市化、生态用地特征及其他干扰源的综合表现,与城镇化水平和城镇用地比例等规模参数相关性不明显,相关系数分别为0.303、0.432,但与城镇用地聚合度呈现明显的负相关,相关系数为-0.807;③破碎分区及破碎度的城市化关联为不同生态用地空间战略的选择提供依据,对面向生态保护的城市化空间引导和规划具有指导意义。Rapid fragmentation of natural ecosystems by anthropogenic activity is the important form of natural landscape evolution on earth surface today. In an ecological sense, fragmentation involves dividing up contiguous ecosystems into smaller areas called ＇patches＇. The development of fragmentation indices mostly parallels the development of landscape ecology. This review examines landscape indices and their usefulness in reflecting the effects of ecosystem fragmentation. Then on the basis of Geographic Information System technology and landscape ecological method, the paper defines the concept of ecological land and measurement indices of fragmentation and urbanization size and spatial configuration, and then quantitatively explores fragmentation properties of ecological land and their relationship with urbanization in the Yangtze River Delta area. Our findings are summarized into three points of view in the end of the paper. （1） Ten NP, PD, FD, SI, MNN, AI and CO based fragmentation indices such as MPS, LPI, CAI, on landscape ecology are firstly handled by selecting the method of Principal Component Analysis of SPSS, and then there are three principal components extracted. The first principal component is defined as size component highly loaded by indices of MPS, LPI, CAI, FD, SI, and the second principal component defined as numeral component highly loaded by NP and PD, and the third component defined as spatial configuration component highly loaded by MNN, AI and CO. According to three principal components the general fragmentation model of ecological land F has been set up. Then the Cluster Analysis is selected to analyze the relationship between F and urbanization level U, urban land ratio UA and Aggregation Index of urban land UI. Lastly there are seven categories areas to be clustered for fragmentation of ecological land in the Yangtze River Delta area, which include two high fragmentation areas （F1, F2）, three moderate fragmentation areas （F3, F4, F5） and two low fragmentation areas （F6, F7

关 键 词：生态用地 破碎度 城市化 关联 长江三角洲 

分 类 号：F301[经济管理—产业经济]