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Publication Information

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Title: Effects of woody debris on anadromous salmonid habitat, Prince of Wales Island, southeast Alaska

Author: Lisle, Thomas E.;

Date: 1986

Source: North American Journal of Fisheries Management 6: 538-550.

Publication Series: Miscellaneous Publication

Description: Abstract - The effects of woody debris on anadromous salmonid habitat in eight streams on Prince of Wales Island, southeast Alaska, were investigated by comparing low-gradient (1-9%) first- or second-order streams flowing through either spruce-hemlock forests or 6-10-year-old clearcuts, and by observing changes after debris was selectively removed from clear-cut reaches. Woody debris decreased the rate of shallowing as discharge decreased, thus helping to preserve living space for fish during critical low-flow periods. Debris dams were more frequent in clear-cut streams (14.9/100 m), which contained more debris, than in forested streams (4.2/100 m). As a result, total residual pool length (length when pools are filled with water but there is no flow) and length of channel with residual depth greater than 14 cm-the depth range occupied by 84% of coho salmon (Oncorhynchus kisutch)-were greater in clear-cut streams than in forested streams.

Keywords: PSW4351, anadromous salmonid, Prince of Wales Island, Alaska, streams, clearcuts, debris dams, woody debris, morphology, riparian zone, pools

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Citation:


Lisle, Thomas E. 1986. Effects of woody debris on anadromous salmonid habitat, Prince of Wales Island, southeast Alaska. North American Journal of Fisheries Management 6: 538-550.

 


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