Study On The Spatial Differentiation Of Economy Of Poyang Lake City Cluster Under The Restriction Of Ecological Security

The different initial resource endowments make huge differences in economic development among urban agglomerations.However,in the process of urban agglomeration development,economic development is not only affected by the initial resource endowment,but also constrained by ecological security.Especially since the 18th National Congress of the Communist Party of China,General Secretary Xi Jinping has incorporated ecological security into the national security system on the basis of accurately grasping the new features and trends of the present day.This measure is of great significance for improving ecological security.It can be seen that the importance of ecological security in today's society has been widely recognized.As the carrier of the Poyang Lake Ecological Economic Zone,the urban agglomeration around Poyang Lake has important economic significance for promoting the rise of central China and the development of the Yangtze River Economic Belt.Based on the landscape ecological security theory and spatial econometric model,this paper discusses the economic spatial differentiation characteristics of urban agglomerations under the constraints of ecological security.Firstly,taking the Poyang Lake urban agglomeration as the research area,the landscape structure safety index and the ecosystem service value are combined to construct the ecological security index,and the entropy method is used to analyze the economic development characteristics of the Poyang Lake urban agglomeration.The econometric model analyzes the characteristics of economic space development under the constraints of ecological security in the study area.The results show that:(1)From 2005 to 2015,the overall ecological safety of the Poyang Lake urban agglomeration has decreased,and some areas have undergone a transformation from high ecological safety to low ecological safety,and ecological risks have increased;(2)Poyang Lake The core area of the urban agglomeration of Nanchang City and the surrounding areas of Nanchang has been the region with the fastest economic development around the Poyang Lake City Group since 2005-2015.Among them,Nanchang City,Nanchang County,Jinxian County and Fengcheng From 2015 to 2015,it has been the leader in the economic development of the Poyang Lake region;(3)Ecological safety has a significant negative spillover effect on economic development,and the spillover effect between regions is greater than the effect within the region,that is,the surrounding Poyang Lake The economic development of urban agglomerations comes at the cost of reduced ecological security.It can be seen that the spatial econometric model combined with the ecological security index can effectively measure the characteristics of the economic development of urban agglomerations under the constraints of ecological security,which can not only provide a new perspective for the economic development of urban agglomerations,but also provide a scientific basis for promoting the sustainable development of urban agglomerations.