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Response of western Oregon stream temperatures to contemporary forest management Public Deposited

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https://ir.library.oregonstate.edu/concern/articles/rn301200z

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Abstract
  • A replicated before–after-control-impact study was used to test effectiveness of Oregon’s (USA) riparian protection measures at minimizing increases in summer stream temperature associated with timber harvest. Sites were located on private and state forest land. Practices on private forests require riparian management areas around fish-bearing streams; state forest’s prescriptions are similar but wider. Overall we found no change in maximum temperatures for state forest streams while private sites increased preharvest to post-harvest on average by 0.7 °C with an observed range of response from -0.9 to 2.5 °C. The observed increases are less than changes observed with historic management practices. The observed changes in stream temperature were most strongly correlated with shade levels measured before and after harvest. Treatment reach length, stream gradient, and changes in the upstream reach stream temperature were additionally useful in explaining treatment reach temperature change. Our models indicated that maximum, mean, minimum, and diel fluctuations in summer stream temperature increased with a reduction in shade, longer treatment reaches, and low gradient. Shade was best predicted by riparian basal area and tree height. Findings suggest that riparian protection measures that maintain higher shade such as the state forests were more likely to maintain stream temperatures similar to control conditions.
  • Keywords: Mixed-effects, Stream temperature, Riparian buffer, Shade
  • Keywords: Mixed-effects, Stream temperature, Riparian buffer, Shade
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Date Issued
Citation
  • Groom, J. D., Dent, L., Madsen, L. J., & Fleuret, J. (2011). Response of western Oregon stream temperatures to contemporary forest management. Forest Ecology and Management, 1618-1629. doi:10.1016/j.foreco.2011.07.012
Journal Title
Journal Volume
  • 262
Journal Issue/Number
  • 8
Academic Affiliation
Déclaration de droits
Funding Statement (additional comments about funding)
  • The Oregon Department of Forestry Private Forest Division and State Forest Division provided substantial project funding, conducted data collection, developed the study design, and assisted in the analysis, interpretation of data, writing of the report, and decision to submit the work for publication. This Project has been funded wholly or in part by the United States Environmental Protection Agency (EPA) under assistance agreement C9-00045105to the Oregon Department of Environmental Quality. The contents of this document do not necessarily reflect the views and policies of the Environmental Protection Agency, nor does mention of tradenames or commercial products constitute endorsement or recommendation for use. The EPA only provided financial support; ODEQ additionally provided a representative to serve on the project’s External Review Committee.
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