Skip to Main Content
Effects of riparian canopy opening and salmon carcass addition on the abundance and growth of resident salmonidsAuthor(s): Margaret A. Wilzbach; Bret C. Harvey; Jason L. White; Rodney J. Nakamoto
Source: Canadian Journal of Fisheries and Aquatic Sciences 62:58-67
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (0 B)
DescriptionWe studied the concurrent effects of riparian canopy opening and salmon carcass addition on salmonid biomass, density and growth rates in small streams over 2 years. In each of six streams in the Smith and Klamath River basins in northern California, red alder (Alnus rubra) and other hardwoods were removed along both banks of a 100-m reach to increase incident radiation. A second 100-m reach, with an intact canopy, was established in each stream as a light control. Salmon carcasses were added each year to both cut and uncut riparian sections in three of the six streams. Differences in total density and biomass of cutthroat trout (Oncorhynchus clarki) and rainbow trout (Oncorhynchus mykiss) from pretreatment levels responded positively to canopy removal but were not detectably affected by carcass addition. Differences in specific growth rates of the fish between open and closed canopy reaches were greater in sites without carcasses than in sites with carcasses. In light-limited settings where temperature gains associated with canopy opening are not problematic for aquatic resources, gains in salmonid production might be achieved by selective trimming of riparian hardwoods.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationWilzbach, Margaret A.; Harvey, Bret C.; White, Jason L.; Nakamoto, Rodney J. 2005. Effects of riparian canopy opening and salmon carcass addition on the abundance and growth of resident salmonids. Canadian Journal of Fisheries and Aquatic Sciences 62:58-67.
Keywordssalmonids, marine-derived nutrients, riparian vegetation
- Seasonal changes in habitat availability and the distribution and abundance of salmonids along a stream gradient from headwaters to mouth in coastal Oregon
- The scotopic visual sensitivity of four species of trout: A comparative study
- Distribution and status of seven native salmonids in the interior Columbia River basin and portions of the Klamath River and Great basins
XML: View XML