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- Title
Influence of streamside buffers on stream temperature response following clear-cut harvesting in western Oregon.
- Authors
Cole, Elizabeth; Newton, Michael
- Abstract
Determining the effectiveness of different riparian buffers for mitigating forest-harvesting impacts on stream temperatures continues to be of interest throughout the world. Four small, low or medium elevation streams in managed western Oregon forests were studied to determine how the arrangement and amount of streamside retention strips (buffers) in clear-cut units influenced stream temperatures. Buffers included ( i) no tree, ( ii) predominantly sun-sided 12 m wide partial, and ( iii) two-sided (Best Management Practice, (BMP)) 15-30 m wide buffers. Harvested units alternated with uncut units along 1800-2600 m study reaches. Impacts of harvesting on stream temperatures were determined by time series comparisons of postharvest and preharvest regressions. Trends for daily maximum and mean stream temperature significantly increased after harvest in no tree buffer units. Partial buffers led to slight (<2 °C) or no increased warming. BMP units led to significantly increased warming, slight, or no increased warming. Temperature responses in uncut units appeared to be linked to responses in upstream harvested units. In many instances, when harvested units exhibited significantly higher postharvest trends, lower trends were observed in the uncut units downstream. Stream temperature trends of 7 day moving maxima indicated warming through the no tree buffer units and some of the BMP units. Peaks in maxima were not maintained in downstream units. Stream temperature responses were related to buffer implementation and stream features, relating to cooling and warming.
- Subjects
RIPARIAN areas; LOGGING; WATER temperature; BEST management practices (Pollution prevention); GLOBAL warming; TIME series analysis; COOLING
- Publication
Canadian Journal of Forest Research, 2013, Vol 43, Issue 11, p993
- ISSN
0045-5067
- Publication type
Article
- DOI
10.1139/cjfr-2013-0138