Study On The Evolution And Typical Model Of Ecological Landscape Pattern In Chongming District

Chongming District is an important ecological strategic location in Shanghai,and its development of "world-class ecological island" is at a critical stage.In order to comprehensively improve the level of Chongming district’s ecological landscape and promote the construction of ecological island,it is necessary to study the evolution of its ecological landscape pattern and the classification of typical patterns,and put forward the optimization direction.By introducing the related theories of landscape ecology,using the methods of landscape pattern index,principal component analysis and cluster analysis,and using SPSS,Arc GIS,Fragstats and other software,this paper comprehensively evaluates the evolution characteristics,driving forces and typical patterns of Chongming’s ecological landscape pattern.Based on the analysis results,the optimization strategy and implementation strategy of Chongming district ecological landscape pattern were put forward.In the evolution of Chongming district’s ecological landscape pattern,the landscape composition and landscape pattern index were used to quantitatively study the evolution of Chongming district’s landscape pattern from 2000 to 2015.It is found that the area of agricultural land in Chongming disctrict has decreased significantly in recent years,and the forest area has increased rapidly in recent years,but the dominance degree is not as good as that of agricultural land.Both of them have a downward trend in aggregation and shape regularity,while the dominance degree,aggregation and regularity of wetland are still low,and the area of construction land has a slight increase,but the aggregation and shape regularity have a downward trend and the heterogeneity has increased.In recent years,the overall level of ecological landscape agglomeration and extensibility declined,landscape shape tended to be complex,and the proportion of various types of area tended to be balanced.In the driving force of ecological landscape change in Chongming district,principal component analysis was used to explore the causes of ecological landscape pattern change in Chongming district from 2000 to2015.It is found that the evolution is the result of the interaction of natural and human factors.Socio-economic factors play a more important role in the evolution of ecological landscape in Chongming district.In the quantitative analysis of social and economic factors,the principal component analysis method is used to analyze 12 socio-economic driving factors.Finally,two driving factors variables are selected as the principal components.In recent years,the driving force comprehensive score has gradually increased,reflecting that the influence of socio-economic factors on the change of ecological landscape pattern in Chongming district has gradually increased.In the follow-up construction of Chongming district ecological island,the economic society and human life should be weakened.Invasion and destruction of ecological resources in Chongming district.In the study of typical ecological landscape patterns in Chongming district,Cluster analysis method was used by landscape pattern index in order to divide Chongming townships.According to the results of cluster analysis,Chongming district’s ecological landscape pattern can be divided into three types: rural strip pattern,urban-rural composite pattern and farm cluster pattern.The typical patterns of Chongming district’s ecological landscape pattern can be refined into three types: rural strip pattern,urban-rural composite pattern and farm cluster pattern.Land-time differences,natural factors such as topography and hydrology,and socio-economic factors such as economic level,industrial development and external promotion of urbanization.In order to form a comprehensive understanding of Chongming’s ecological landscape pattern pattern.Based on the above research results and Chongming’s development orientation,the specific countermeasures and implementation strategies of Chongming’s ecological landscape pattern optimization are put forward from four aspects: the proportion of landscape pattern,landscape ecological network,landscape patch quality and regional classification.This paper studies and optimizes the evolution,driving forces and typical patterns of Chongming’s ecological landscape pattern.The conclusions can not only provide guidance and reference for Chongming’s agricultural ecological landscape pattern planning,but also provide reference for the development of similar areas in China,and have certain significance for promoting the construction of Chongming’s ecological island and promoting the development of national ecological civilization.