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Invasion versus isolation: trade-offs in managing native salmonids with barriers to upstream movement.

Citation

Douglas P Peterson, Kurt D Fausch, Bruce E Rieman, Jason B Dunham, and Michael K Young, Invasion versus isolation: trade-offs in managing native salmonids with barriers to upstream movement.: .

Summary

Conservation biologists often face the trade-off that increasing connectivity in fragmented landscapes to reduce extinction risk of native species can foster invasion by non-native species that enter via the corridors created, which can then increase extinction risk. This dilemma is acute for stream fishes, especially native salmonids, because their populations are frequently relegated to fragments of headwater habitat threatened by invasion from downstream by 3 cosmopolitan non-native salmonids. Managers often block these upstream invasions with movement barriers, but isolation of native salmonids in small headwater streams can increase the threat of local extinction. We propose a conceptual framework to address this worldwide problem [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS export <br> On - Tue May 10 10:05:12 CDT 2011

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Title Citation Invasion versus isolation: trade-offs in managing native salmonids with barriers to upstream movement.

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