Study On The Spatiotemporal Evolution Characteristics And Influencing Factors Of Ecosystem Resilience In The Yellow River Basi

The Outline of the Plan for Ecological Protection and High-quality Development of the Yellow River Basin,released in 2021,means that the state attaches great importance to the ecological problems of the Yellow River Basin,and the ecological development of the Yellow River Basin plays an important role in the process of highquality economic development.Therefore,it is of great significance to study the spatiotemporal evolution of ecosystem resilience in the Yellow River Basin and its internal and external influences.How to measure ecosystem resilience in the Yellow River Basin? What is the change trend of the resilience of the subsystems that make up the ecosystem,and what is the relationship between the resilience of the subsystems? How is the resilience of ecosystems affected between regions? The discussion of these problems will help to fully grasp the ecological status of the Yellow River Basin and provide reference for improving the resilience of the ecosystem of the Yellow River Basin.In this paper,data from 2005 to 2021 were selected to explore the internal change characteristics and external influencing factors of ecosystem resilience in the Yellow River Basin.In this paper,an index system of ecosystem resilience of the Yellow River Basin was first constructed,and four subsystems of water resources,energy,environment,economy and society were selected as components of the ecosystem of the Yellow River Basin.A calculation model of ecosystem resilience index was constructed based on the maximum range principle to calculate the resilience index of the ecosystem and its subsystems.Secondly,the spatial and temporal evolution characteristics of the resilience of the ecosystem and its subsystems are analyzed.PVAR model and coupling coordination degree model are used to analyze the dynamic coordination relationship within the ecosystem.Finally,the influence of technological innovation,opening to the outside world and industrial structure on the ecosystem is analyzed.The main conclusions are as follows:(1)From 2005 to 2021,ecosystem resilience in the Yellow River Basin fluctuated and increased,with obvious spatial agglomeration characteristics.The change trend of resilience of the environmental subsystem was consistent with that of the ecosystem.The energy subsystem showed an upward trend of fluctuation,and the water resource subsystem maintained a stable trend of fluctuation.The resilience of each subsystem showed an obvious spatial aggregation feature.(2)From the perspective of the internal dynamic relationship of the ecosystem,the resilience of the water resource subsystem is mainly affected by the environmental subsystem and the economic and social subsystem,and the resilience of the energy subsystem is greatly affected by the resilience of the water resource subsystem and the economic and social subsystem.The resilience of the environmental subsystem contributes to the environment subsystem in addition to itself.It is mainly affected by the resilience of water resources subsystem and the resilience of economic and social subsystem.The resilience of economic and social subsystems is significantly affected by the resilience of water resources subsystem,energy subsystem and environmental subsystem.From the coupling coordination relationship,the resilience coordination levels of water resources,energy,environment and economic and social subsystems in the Yellow River Basin are mostly in the category of disharmony and decline.(3)The impact of technological innovation on ecosystem resilience is significantly positive,but relatively weak between regions.Regional technological innovation affects the economy and society,energy,environmental governance,water resources and other aspects,and plays a certain role in promoting the improvement of ecosystem resilience,but the impact of technological innovation level between regions is weak.Opening to the outside world has a significant promoting effect on the improvement of ecosystem resilience in the Yellow River Basin and has a significant spillover effect.Industrial institutions have a negative impact on ecosystem resilience,and the spillover effect is obvious,indicating that the increase of the proportion of tertiary industry has a certain restricting effect on the improvement of ecosystem resilience.