Abstract
Urban ecosystem health assessments can be applied extensively in urban management to evaluate the status quo of the urban ecosystem, identify the limiting factors, identify key problems, optimize the scheme and guide ecological regulation. Regarding the multi-layer roles of urban ecosystems, urban ecosystem health should be assessed at different scales with each assessment providing a specific reference to urban management from its own viewpoint. Therefore, a novel framework of multi-scale urban ecosystem health assessment is established on global, national, regional and local scales. A demonstration of the framework is shown by using a case study in Guangzhou City, China, where urban ecosystem health assessment is conducted in the order of global, national, regional, and local scales, from macro to micro, and rough to detailed analysis. The new multi-scale framework can be utilized to generate a more comprehensive understanding of urban ecosystem health, more accurate orientation of urban development, and more feasible regulation and management programs when compared with the traditional urban ecosystem health assessment focusing at the local scale.
Highlights
As a center of production and consumption, urban ecosystems have satisfied human demands throughout most of history
Attributed to its value-driven characteristics that are strongly influenced by human perceptions [19], urban ecosystem health should be conceptualized as a process [20,21], which can give us much more hope and impel us to focus more studies on the dynamic trends of health status
The urban ecosystem health assessment can be conducted in the order of global, national, regional, and local scales, from macro to micro, and rough to detailed analysis
Summary
As a center of production and consumption, urban ecosystems have satisfied human demands throughout most of history. Accelerated by practical demand, the assessment indicators [4,5,6,7,8] and methods [9,10,11,12,13] have developed quickly on a scientific foundation [14,15] Reviewing this development, urban ecosystem health assessments are usually conducted on the local scale. A novel framework of multi-scale urban ecosystem health assessment and its applications in management are established from the global, national, regional and local scale view points. It is established considering the concerned factors of urban ecosystem health and multi-layer roles of urban ecosystem.
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