| The continuous improvement of urbanization level and the accelerated development of urban construction have a certain impact on the health of urban ecosystem.Urban ecosystem health is a necessary condition for human survival and development,the foundation of regional sustainable development,and the need of human health.The evaluation of urban ecosystem health,which is suitable for sustainable urban development,maintains the health of urban ecosystem and promotes the virtuous cycle of urban ecosystem,is a hot spot and an important topic for many scholars at home and abroad.Urban agglomeration in the middle reaches of the Yangtze River,as new growth poles of national economic development,pioneering zones for new-type urbanization in central and western China,demonstration zones for inland opening-up and cooperation,and leading zones for "two-oriented" social construction,are pushing China’s economy towards a sound and stable development.Urban agglomeration in the middle reach of Yangtze river based on 28 cities as the research object,using natural ecology theory,selection of system dynamic,organization structure,restoring force,service function,people health five elements,22 indicators,specific VORSP based evaluation model of urban ecosystem health evaluation index system,uses the translation correct information entropy method,the fuzzy comprehensive evaluation method of regional urban ecosystem health evaluation and spatial pattern analysis.The research conclusions are as follows:(1)The influencing factors of urban ecosystem health in the study area showed a trend of "one high,one low,and the overall trend of balance".The resilience factor has little impact on the ecosystem health of urban agglomerations,while the weight difference of the four influencing factors,namely service function,vitality,organizational structure and population health,gradually decreases,and finally presents an overall state of balance in2017.(2)The healthy development level of urban ecosystem in the study area is generally on the rise,but there are some differences in the health level of ecosystem among the three main urban agglomerations.The health status of the city group around Changzhutan is developing rapidly,followed by the city group around Poyang Lake,and finally the Wuhan city circle.(3)Wuhan,Ezhou,Xiaogan,Yichang,Jingmen,Xiangyang,Yingtan,Nanchang,Ji’an,Yichun,Shanrao,Changsha,Xiangtan,Hengyang,Changde,Loudi,And Yiyang are developing to a healthier level.Vitality,resilience and population health factors have great influence on the health of Wuhan urban circle.Vitality,resilience,organizational structure and population health factors have great influence on the health of urban agglomeration around Poyang Lake.Service function,resilience and crowd health factors have great influence on the health of the urban agglomeration around Changzhutan.(4)The evolution of the healthy spatial pattern of the urban ecosystem in the study area shows the distribution of "mainly central cities gathering radiation outward".In 2010,the middle part of the study area was in good health status,while the two ends were in poor health status.In 2017,Wuhan,Nanchang and Changsha,the three central cities,radiated to the surrounding areas to drive the overall healthy development trend. |
