Research On The Green Space Pattern Of Mountainous Cities Based On Landscape Ecology Analysis

The distribution of urban green landscape pattern directly affects the continuance and functional effect of urban ecological process,and rational structure of green space landscape pattern is the core of ecological construction.Whether the structure of the "source-sink-corridor" in urban green space ecosystem is reasonable and the ecological network is available,is the key to the protection of urban biodiversity and sustainable development of green space ecosystem.This paper based on the theory and method of landscape ecology,it takes remote sensing image as the data source in Anshun,combining with site survey,carry out the following research:1)Utilizing GIS(Geographic Information System)to classify the green space information in research area,analysis of the study area green space by use landscape pattern index method,the result show that:The total number of patches in the study area is 19289,small patches(less than 500m~2)are the main ones,91%of the total patches,it has an absolute advantage in quantity;The Simpson's diversity index(SIDI)is 0.71,Simpson's evenness index(SIEI)is 0.78,all kinds of green patches have less connectivity,and there is a discrepancy in the size of patches between different green space.Its fragmentation is quite serious,with a strong human disturbance,and patch shapes tend to be regular.2)Exploration and analysis of ecological network in the research area by using the minimum consumption model method:A total of 16 large habitat patches are identified as ecological sources,including lion mountain park,Tuobao mountain park and Miaopo,etc.The ecological corridor of the study area is screened to 120 potential corridors,including 19 important ecological corridors.The value of alpha,beta,gamma of the eco-network is 0.15,1.19,0.45 respectively.Its constituent circuits are less and present a "Y" tree structure.Part of the eco-corridor is unconnected,and the network connection is low.3)Based on the analysis of the landscape spatial pattern and the landscape ecological network,it offers a optimization strategy for the landscape pattern in study area,For example,on the basis of constructing an important ecological network,strategies such as increasing habitats,planning of ecological sources,water systems,and road corridors for important park green areas will make the distribution of landscape patterns in the study area reasonable and enhance the connectivity of ecological corridors.Construct an ecologically efficient landscape pattern in the study area.