Ecological security measurement of the Yangtze River economic belt

Urbanization in the Yangtze river economic belt is developing rapidly, but many ecological security problems have seriously restricted its high-quality development. This paper aims to integrate the advantages of the characteristic index method and the index system method and explain the new connotation of the symbiotic development of social economy and ecology. Based on the analysis of the interaction between urbanization development and natural ecology, we selected data from 11 provinces and cities along the Yangtze river economic belt from 2006 to 2017 and used"drive-pressure-state-impact-response(DPSIR) "model, R clustering method and coefficient of variation method to determine the ecological security index and its weight. Then, the lotka-volterra symbiosis model of urbanization-natural ecology was applied to obtain stress index and comprehensive characteristic index with ecological economic connotation, to achieve the coupling of index and indicator, and further to deduce the basis for early warning of e