Studies on Urban Ecosystem Health and Its Assessment Indexes System

Urban is an advanced man-made complex ecosystem consisted of nature,society and economy.The sustainable development of city is determined by urban ecosystem health.Based on the connotation of urban ecosystem health,the author demonstrated the concept and correlated characteristics of urban ecosystem health,and analyzed the restriction factors.Following the principle of assessment indexes,five factors were suggested to access the urban ecosystem health,including vigor,organization structure,resilience,maintaining the ecosystem functions and the health situation of crowd.Because of these,an assessment index system of urban ecosystem health is set up,so as to provide credible background for promoting the development of urban ecosystem health and practicing the management of urban ecosystem health.