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  1. Fuel treatment effects on tree mortality following wildfire in dry mixed conifer forests, Washington State, USA

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    Author(s): Susan J. Prichard; Maureen C. Kennedy
    Date: 2012
    Source: International Journal of Wildland Fire. 21(8): 1004-1013
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (779.64 KB)

    Description

    Fuel reduction treatments are increasingly used to mitigate future wildfire severity in dry forests, but few opportunities exist to assess their effectiveness. We evaluated the influence of fuel treatment, tree size and species on tree mortality following a large wildfire event in recent thin-only, thin and prescribed burn (thin-Rx) units. Of the trees that died within the first 3 years, most died in the first year regardless of treatment. First-year mortality was much higher in control and thin-only units than in thin-Rx units. Cumulative third-year mortality followed a similar trend. Percentage crown scorch is a strong predictor of mortality and is highly dependent on fuel treatment. Across all treatments, Pinus ponderosa had a lower probability of post-fire mortality than did Pseudotsuga menziesii. This study contributes further evidence supporting the effectivencss of thinning and prescribed burning on mitigating post-fire tree mortality. We also present evidence that a combination of thinning and prescribed burning is associated with lower incidence of post-fire bark beetle attack.

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    Citation

    Prichard, Susan J.; Kennedy, Maureen C. 2012. Fuel treatment effects on tree mortality following wildfire in dry mixed conifer forests, Washington State, USA. International Journal of Wildland Fire. 21(8): 1004-1013.

    Keywords

    bark beetles, crown scorch, Pinus ponderosa, Pseudotsuga menziesii

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https://www.fs.usda.gov/treesearch/pubs/43729