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Landscape pattern analysis of urban forest in central Beijing

TONG Jihong;WANG Xinjie;WANG Jin;FU Feng;Key Laboratory of Forest Cultivation and Conservation,Ministry of Education,Beijing Forestry University;  
Urban forest is one of the most important ecological development in the urban area of a city. Taking the urban forest in central Beijing as research object,we divided it into four types of urban forest according to its ecological service function,including subordinated landscaping forest,road river shelter forest,city park leisure forest and suburban recreation forest. Extracting four types of urban forest using object oriented method and transformed into thematic maps based on GF-2 high-resolution images on September 16,2016. Then we analyzed the number of patches,patch constitution,fragmentation index,Simpson's diversity index,Simpson's dominance index and aggregation index with Fragstats4.2 software. The results suggested superiority of high resolution remote sensing data,about 32.35% area of central Beijing were covered by urban forests total area being 22 514.79 hm2,about 13.62 % of all patches were large patches with area being 73.20%. Unbalanced and irrational distribution on different positions and rings,subordinated forest and road river shelter forest were the dominant landscapes,however,with high fragmented landscape and low aggregation index,the other two kinds of landscapes took small proportion,especially poor in South Beijing. Besides the fragmentation level reduces from the second ring road to the fifth ring road,with the highest fragmentation pattern in the second ring about183.50. Based on these results,suggestions are promoted as follows,making full use of small patches and build pocket park,strengthening the construction of road river shelter forest in order to connect city park forest and suburban recreation forest,increasing urban forest coverage within the third ring road and improving the quality of urban forest outside the third ring road.
【Fund】: 国家重点研发计划项目(2017YFC050410101);; 中央高校基本科研业务费专项项目(BLJD200907 JD2010-2)~~
【CateGory Index】: TU986;S718.5
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