| With the rapid economic growth and continuous urbanization,depletion of resources,degradation of vegetration,decline of air quality,pollution of water resource and other problems have become increasing severe.Ecological health is an important basis for the development of a region,and a reasonable ecological security evaluation is an important part of promoting the improvement of regional ecological environment quality,which can provide theoretical basis of formulating relevant policies for the government and will play a vital role in realizing the sustainable development.On the basis of summarizing the research progress and related theories of ecological security,this paper briefly introduced the current situation of population,economy and environment development in Anhui Province,combined with the DPSIR framework of "Driving-Pressure-State-Impact-Response",and constructed the comprehensive evaluation index system of ecological security in Anhui Province comprehensively.In order to give consideration to the advantages of subjective and objective weight,the ideal point method is used to assign reasonable weights of indexes reasonably.Then the Lotka Volterra symbiosis model was introduced to analyze the temporal changes of ecological security in Anhui province from 2008 to2019,and the spatial gravity model was introduced to study the spatial effects of ecological security in 16 prefecture-level cities comprehensively in Anhui Province.On this basis,the panel econometric model was constructed to the spatial effects of ecological security in 16 prefecture-level cities in Anhui Province.By comparing the empirical results,the countermeasures and suggestions for improvementare put forward in the paper,providing theoretical guidance for the coordinated development between economy and ecology of Anhui Province.The empirical results show that it is feasible and operable to use lotka-Volterra symbiosis model to evaluate regional ecological security,and the main conclusions are as follows:(1)From 2008 to 2019,the comprehensive level of economic system and ecosystem in Anhui province developed rapidly,and the ecological security has been upgraded from sub-safety to safety(the state of Ⅴ to Ⅵ).The economic system and ecosystem were in the coordinated development state of mutual benefit,and the regional ecological security was gradually improved.However,the stability of their coordinated development was poor.(2)The ecological security of 16 prefecture-level cities in Anhui province has also improved apparently,but there are significant disparities between regions.The ecological security pattern of "better in the north and south,lower in the middle" was presented.(3)From the perspective of the interaction among cities,the interaction of ecological security among 16 cities was quite different in Anhui Province,then the spatial interaction between cities with relatively close traffic distance was relatively obvious.Except Tongling and Chizhou,From 2008 to2019,the comprehensive effect of ecological security among cities of Anhui Province was on the rise directly.Therefore,the spatial connection of ecological security in these cities of Anhui Province was weak,and regional spatial connection needs to be strengthened.(4)The factors affecting ecological security had different functions.The value-added of tertiary industry,the expenditures for energy conservation and environmental protection of government,and the number of persons employed pass the correlation test and the coefficients are positive.That is,the optimization of industrial structure,the intensity of environmental regulation and the social security system can promote the improvement of ecological security.GDP and science and technology expenditure have not reached the requirement of significance.Therefore,we need to give full play to the role of social,economic and technological innovation in the construction of ecological civilization in the future.Combined with the research conclusions,the author puts forward "actively adjust the industrial structure,promote the continuous improvement of regional environmental quality","make full use of advantages according to regional conditions,explore the regional environmental protection road by different measures","strengthen the urban spatial connection,give play to the radiation driving role of central city" and "increase the development of environmental protection technology,improve the supporting role of environmental governance " to effectively improve the quality of ecological environment in Anhui Province.Figure [8] Table [13] Reference [102]... |
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