Studies On Landscape Pattern And Biodiversity Conservation Of Municipal Open Space In Beijing

Urban biodiversity is one important component of urban ecosystem. Along with the rapid urbanization in recent years, the urban biodiversity which is closely related to human beings has been seriously threatened. The quality of urban ecological environment is getting worse. The relationship between human and nature, and the urban sustainable development is being challenged. Research on urban ecosystem which is complicated has become a hotspot and difficult task in recent years.The focus of this research is the greenbelts within the 5th circle road in Beijing,it is an area which has been highly developed with intensive population. The research explores field study and data collection, uses quality and quantity analysis methods and GIS techniques to illustrate the whole picture of current situation of urban biodiversity and the greenbelt landscape pattern within the 5th circle road. As a result, the greenbelt biodiversity conservation and sustainable development plan for the area within the 5th circle road in Beijing has been developed.Main research results are as follows:According to the urban floral category, there are 559 plant species in total which belong to 102 families and 325 genus in the greenbelts within the 5th circle road in Beijing. Among them, there are 10 alien species, 2 state protected species, and 308 native species which accounts for 55.10% of the total plant species within the 5th circle road. There are also 144 domestic introduced species, 107 abroad introduced species; 237 native wild growing species, which occupy 42.4% of the total plant species in the area. Among these species, 216 are herb plants, most of which grow as weeds in the urban greenbelts these species shows great potential for afforestation. The research indicates that the majority of greenbelt plants are native species while and the introduced species also account for a big proportion.After comparing the composition structure of plant species in greenbelts, we find that the greenbelt in parks have the richest diversity, followed by subsidiary greenbelts, the road and water system have the least plant species. The tree and shrub layers in subsidiary greenbelts have the highest diversity index; while the biodiversity is lower in road greenbelt system; grass layer of the greenbelts in parks have the highest diversity index. Based on the comparative results of dominance degree of tree species in greenbelts, it proves that few tree species are absolutely dominant in all kinds of greenbelts, the...