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): M.J. Trappe; K., Jr. Cromack; J.M. Trappe; J. Wilson; M.C. Rasmussen; M.A. Castellano; S.L. Miller
    Date: 2009
    Source: Canadian Journal of Forestry Research. 39: 1662-1676
    Publication Series: Scientific Journal (JRNL)
    PDF: View PDF  (2.79 MB)


    Intensive recreational use of subalpine forests can create localized areas of concentrated disturbance where vegetation is altered, soils compacted, and surface fuels depleted. Many aspects of this disturbance type have been studied, but no research has focused on the effects of recreational use on mycorrhizal fungus sporocarp production. We measured the effects of recreational land or site use on soil properties and fuel levels and related these attributes to mycorrhizal fungal sporocarp production at Crater Lake National Park, Oregon. Control and disturbed sites differed significantly in soil bulk density, 15N enrichment, and fuel levels, but not in total fungal collections or species diversity at the macrosite scale. Our sampling methods were not designed to quantify the effects of anthropogenic disturbance on fungal fruiting patterns at the micro site scale, but fungal productivity was markedly reduced in the most disturbed microsites. Within the disturbed units, the paucity of fungi collected in highly disturbed micro sites was offset by the abundance and diversity of mycorrhizal fungi collected in protected microsites. Many fungal species did not differ significantly in fruiting patterns or in preferences between sites or treatments at the macro site scale, but several indicator taxa were identified.

    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.


    Trappe, M.J.; Cromack, K., Jr.; Trappe, J.M.; Wilson, J.; Rasmussen, M.C.; Castellano, M.A.; Miller, S.L. 2009. Relationships of current and past anthropogenic disturbance to mycorrhizal sporocarp fruiting patterns at Crater Lake National Park, Oregon. Canadian Journal of Forestry Research. 39: 1662-1676.


    Google Scholar


    anthropogenic distrubance, mycorrhizal sporocarp, Crater Lake National Park, Oregon

    Related Search

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