A GIS site-selection process for habitat creation: estimating connectivity of habitat patches

The paper presents a method that addresses the problem of site-selection for habitat creation involving spatial processes on the landscape scale. It interprets landscape ecological principles, with focus on population dynamics, to specific information required to support a particular decision at each stage of the process. The approach focuses on deciduous woodland with the redstart Phoenicurous phoenicurous as an umbrella species for woodland birds and is illustrated within the fragmented landscape of the east midlands area of England. The method requires the use of a Geographic Information System (GIS) to estimate the connectivity of habitat patches. Each patch is assigned a “cost” value that represents the cost of dispersal over a friction surface. The sites are ranked accordingly and, in combination with the spatial context and size, are prioritised in terms of their potential for forming cores for habitat creation. Habitat patches with low cost values, a large area of surrounding habitat and small size were identified as potential sites for expansion in order to satisfy the minimum requirements of the species. The approach is generic, applicable to any species, and despite its limitations it can be a useful aid in conservation planning.

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