Research On The Construction Of Urban Ecological Function Network In Pingtan Island

By the least cost distance model building ecological function network to protect the ecological system,improve the ecological system stability,limit the spread of urban pattern and promote economic sustainable development is of great significance.This paper Pingtan island as an example,the use of RS and GIS software for the2010Pingtan island Landsat-TM satellite remote sensing image interpretation,get research area landscape type vector diagram.Use landscape index Fragstats3.3software on the operations of the landscape pattern index, using the statistical software for Windows SPASS11.0of selected index for the correlation analysis,using entropy value method to evaluate the weight calculation,and finally,using the ARCGIS9.0ecological function network construction.The results indicated as follows:(1)The landscape pattern, there are certain correlation between index,using factor analysis method of selecting representative landscape index significance as evaluation index,a research area landscape ecological function resistance evaluation index system of indicators are12,including CA,PD,LSI, MSI,FRAC_AM,PARA_MN,PARA_AM,IJI,SPLIT,AI,MESH,ESV.(2)Forest landscape and the farmland landscape of total area landscape area and the largest, the farmland landscape shape of patch of irregularities supreme;Low cover landscape and other landscape type plaques highest frequency adjacent;Construction land and other types of landscape adjacency degree worst; Forest land and farmland landscape fragmentation of the highest degree,gather the lowest levels;(3)The ecological function selection as the best network E network structure,but still has some problems,and the ecological function built in less node,forming no effective network,can’t make good use of network of ecological benefits.