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Rights Statements InC/1.0 , Open Access
Journal article
Influence of partial harvesting on stream temperatures, chemistry, and turbidity in forests on the Western Olympic Peninsula, Washington
Northwest science., Vol.74(2), pp.151-164
2000
Handle:
https://hdl.handle.net/2376/1065
Abstract
Stream temperatures, chemistry and turbidity were monitored in two partially harvested (7-33%) watersheds, Rock and Tower creeks, and an uncut old-growth watershed, West Twin Creek in the Hoh River Valley on the Olympic Peninsula, Washington. Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) was replanted in the harvested areas and red alder (Alnus rubra Bong.), a nitrogen fixer, dominated the riparian areas in the sampling sites on Rock and Tower creeks. We collected grab stream water samples monthly, from May 1996 to June 1998 and analyzed them for pH, electrical conductivity, total N and P, and major cations and anions. Stream temperatures were monitored continuously and turbidity was monitored monthly from May 1997 to June 1998. Partial harvesting had little influence on stream temperature, chemistry and turbidity 11-15 years after harvesting. Stream temperatures were more seasonally variable in the harvested streams compared to the unharvested old-growth site with an average summertime maximum elevated by 3.5degreeC. Maximum stream temperatures did not exceed 16degreeC in any stream and therefore salmonid species are not likely to be affected. There were significant differences in concentrations of some cations, anions and EC between the old-growth and the partially harvested watershed streams, but in most cases concentrations were actually higher in the unharvested watershed. Nitrate concentrations and stream turbidity were not significantly higher in the harvested watersheds
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Details
- Title
- Influence of partial harvesting on stream temperatures, chemistry, and turbidity in forests on the Western Olympic Peninsula, Washington
- Creators
- G.L.D. Murray (Author)R.L. Edmonds (Author)J.L. Marra (Author)
- Publication Details
- Northwest science., Vol.74(2), pp.151-164
- Academic Unit
- Northwest Science
- Publisher
- WSU Press
- Identifiers
- 99900502077001842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Journal article