ConserveOnline - Physical tools for predicting habitat patch networks at basin scales, by John Buffington

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Physical tools for predicting habitat patch networks at basin scales, by John Buffington

By Web Admin on 6/5/2007 | Keyword(s): Session iv: geospatial tools for estimating salmon distribution

Physical tools for predicting habitat patch networks at basin scales: Potential applications for understanding salmonid persistence in a changing environment Habitat features critical for different salmonid species and life stages are created and destroyed by physical processes acting across a range of spatial and temporal scales, which create a patchy distribution of habitats across the landscape. Recent conservation strategies for salmonids emphasize the role of landscape-scale networks of habitat patches. In particular, the size, connectivity, and quality of spawning and rearing patches may be important for population success according to metapopulation concepts. Here, we discuss several physical models for predicting the size, spatial distribution, and dynamics of patches in habitat networks for example species of salmonids. We also discuss some potential consequences of climate change on physical habitat characteristics and speculate on potential responses of habitat networks to these disturbances. Threshold responses are likely to occur, and models are needed to predict these thresholds so that management can be proactive.

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