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  1. Effects of bear damage on Douglas-fir lumber recovery

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    Author(s): Eini C. Lowell; Dennis Dykstra; George McFadden
    Date: 2009
    Source: Western Journal of Applied Forestry. 25(2): 73-80
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (3.78 MB)

    Description

    Bear activily resulting in injury to Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) trees has been documented as early as the mid-1850s in the Pacific Northwest. The study reported in this article was designed to help managers decide whether the common practice of removing the damaged but potentially valuable butt section of the bottom log and leaving it in the woods is warranted. Thirty-four damaged and 28 undamaged trees were selected from three sites in western Washington where bear damage has been a persistent problem. Trees were felled and bucked into 16-ft lengths. The damaged trees in the sample had been injured at ages between 10 and 15 years at two sites and between 10 and 65 years at the third site. The primary scaling deductions were for ring and scar defects.

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    Citation

    Lowell, Eini C.; Dykstra, Dennis; McFadden, George. 2009. Effects of bear damage on Douglas-fir lumber recovery. Western Journal of Applied Forestry. 25(2): 73-80.

    Keywords

    bear damage, Douglas-fir lumber recovery, log value

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