Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): William D. Tietje; Michael A. Hardy; Christopher C. Yim
    Date: 2015
    Source: Gen. Tech. Rep. PSW-GTR-251. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 61-72.
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (247.0 KB)


    Little information is available on the metrics of coarse woody debris (CWD) in California oak woodland, most notably at the scale of the stand and woodland type. In a remote part of the National Guard Post, Camp Roberts, that has not burned in over a half century, we tallied 314 pieces of CWD in a blue oak (Quercus douglasii)-coast live oak (Q. agrifolia) woodland with patches of tree-sized bigberry manzanita (Arctostaphylos glauca). Compared to its representation in the live tree community, blue oak trees produced only half of the pieces of CWD expected. In contrast, coast live oak trees produced somewhat more pieces than expected, and in sharp contrast, manzanita produced four times more than expected. Among the three species of CWD that we tallied, coast live oak was the most abundant and comprised nearly half (43 percent) of all logs on the study area. Blue oak and manzanita comprised 35 percent and 22 percent of logs, respectively. Although coast live oak logs were more abundant, the largest volume of CWD was blue oak, and the largest logs were blue oak. The largest log measured 0.9 m in diameter, 12.8 m in length, and 3.6 m3 in volume. Relatively more blue oak logs were hollow than logs of live oak or manzanita, by two times and three times, respectively. Two-thirds of all CWD was found in more advanced stages of decay. This effect was most pronounced for coast live oak and least for manzanita. Information on CWD from remote and relatively unmanaged blue oak-coast live oak woodland that has not burned for >50 years will assist the management and maintenance of this important habitat element.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Tietje, William D.; Hardy, Michael A.; Yim, Christopher C. 2015. Coarse woody debris metrics in a California oak woodland. In: Standiford, Richard B.; Purcell, Kathryn L., tech. cords. Proceedings of the seventh California oak symposium: managing oak woodlands in a dynamic world. Gen. Tech. Rep. PSW-GTR-251. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 61-72.


    California oak woodland, coarse woody debris, CWD, dead and down wood, downed wood, Quercus spp.

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page