Abstract
Under the background of urban expansion, ecological protection cannot be delayed. The construction of ecological networks is of considerable significance to ecosystem services. However, in the process of constructing a corridor network, there is no uniform standard for the selection of ecological sources and the determination of cost factors. The InVEST model is an effective complement to ecosystem service assessment for sensitively measuring external threats and their threat intensity. Therefore, taking Wuhan as an example, we combined InVEST and the least cost path model (LCP) to construct a multi-target corridor network with comprehensive cost factors for birds and small terrestrial mammals. The results showed that: (1) The InVEST model provided a reliable basis for ecological source screening by demonstrating the distribution of habitat quality. (2) The corridor with a length of 12–25 km presented a “U” shape, and the impact of urbanization on small terrestrial mammals was more significant than that of birds. (3) The integrated network pattern proposed by the “point-line-plane” principle would provide a reference for urban ecological construction and sustainable development.
Highlights
With the acceleration of urbanization, human activities have changed land use and caused habitat loss [1]
(3) The integrated network pattern proposed by the “point-line-plane” principle would provide a reference for urban ecological construction and sustainable development
Habitat Assessment and Source Identification Based on Integrated Valuation of Environmental Services and Tradeoffs (InVEST) Model
Summary
With the acceleration of urbanization, human activities have changed land use and caused habitat loss [1]. From the perspective of spatial structure, it refers to the urban ecological network system constructed of intersecting corridors and ecological patches [7]. In the LCP model, the source patches and cost surface (resistance surface) are the main factors used to determine the least cost path regarded as the ecological corridor with a great possibility. The primary purposes of our research are (1) to incorporate habitat quality into the source selection; (2) to explore what differences exist between the corridors of birds and small terrestrial mammals, and why are there these differences; (3) to propose an integrated network planning strategy for sustainable urban development
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