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    The distribution and abundance of many plants and animals are influenced by the spatial arrangement of suitable habitats across landscapes. We derived habitat maps from a digital land cover map of the ~178,000 km2 Chesapeake Bay Watershed by using a spatial filtering algorithm. The regional amounts and patterns of habitats were different for species which occur in 'woody', 'herbaceous', and 'woody-edge' habitats. Habitat for finer-scale species (~5 ha home range) was twice as abundant and more evenly distributed than habitat for coarser-scale species (~410 ha home ranges) in a 11,000 km2 sub-region. Potential impact sof land cover changes on habitats in different parts of the region were assessed by the frequency distributions of habitat suitability for smaller (~3000 km2) embedded watersheds. The methods described in this paper can be applied to several scales of digital land cover data, and used to derive multiple-scale habitat suitabilities for a number of species or guilds.

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    Riitters, Kurt H.; O''Neill, R.V.; Jones, K.B. 1997. Assessing Habitat Suitability at Multiple Scales: A Landscape-Level Approach. Biological Conservation 81(1997) 191-202


    landscape ecology, wildlife habitat, spatial statistics, risk assessment, scale

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