Towards an index of biodiversity potential: example in an anthropised and fragmented landscape matrix

Abstract

Promoting biodiversity is a major issue in urban planning. Estimating the biodiversity potential of patches in the landscape matrix often uses the tools of spatial analysis and landscape ecology indices, especially in large study areas. In this paper, we present the construction of a composite biodiversity potential index (CBPI) based on structural and functional approaches of landscape ecology. The CBPI is composed of eight indices (quality: permeability, fragmentation, environmental management; shape: size, shape complexity; configuration: contrast between neighbouring patches, distance to the most favourable habitats, distance from built-up areas). The CBPI appears to be suitable for anthropised and fragmented landscape matrices. It can be used to identify ecological networks in an ‘Avoid, Reduce, Compensate’ approach and can be readily updated with new map databases.

Keywords

• GIS
• decision support
• fragmentation
• biodiversity indicator
• connectivity