Study On Urban Biodiversity Conservation From The Perspective Of Landscapeecological Security Pattern

With the continuous development of the city and the expansion of the construction area,there are a series of problems,such as the unreasonable scale of urban construction,the destruction of the urban ecological environment and so on.Based on the background of ecological civilization construction,in order to find more accurate and scientific methods to protect biodiversity in Haidian District of Beijing from the perspective of landscape ecological security pattern,this paper discusses the construction method of landscape ecological security pattern from the perspective of urban biodiversity protection,combining landscape ecological security pattern with protection vacancy analysis method,The measures of urban biodiversity protection are obtained.With the support of relevant basic theoretical research,this paper analyzes the feasibility of biodiversity protection in Haidian District,and puts forward the construction method of landscape ecological security in Haidian District: Based on MSPA method to analyze the ecological land,extract the important ecological sources and study the coupling network connectivity,Select the appropriate resistance factors of natural environment factors and human activity construction factors,and refer to the research of relevant scholars to determine the resistance value,and then build a comprehensive resistance surface,extract the potential ecological corridor in arcgis10.2,analyze the important ecological corridor through the gravity resistance model,compare and select the ecological network,and select the optimal landscape ecological security pattern.Based on the NDVI data,land use types and hot spots of human activities,the distribution of key species in Haidian District was predicted,Compared with the distribution of ecological sources of ecological security pattern,the "blank" area of protection was obtained,the ecological corridor was supplemented,and the important ecological nodes were extracted to complete the construction of landscape ecological security pattern.Finally,according to the landscape ecological security pattern,the paper puts forward the relevant measures for biodiversity protection in Haidian District,mainly including: the general principles of biodiversity protection,the planning strategy of ecological corridor,the spatial strategy of biodiversity protection,the construction strategy of urban blue-green network and the construction of biodiversity protection evaluation system.