North American Fungi Volume 10, Number 3, Pages 1-28 Published May 29, 2015 Bridgeoporus nobilissimus is much more abundant than indicated by the presence of basidiocarps in forest stands Matthew Gordon1 and Kelli Van Norman2 1Molecular Solutions LLC, 715 NW Hoyt St., #2546, Portland, OR 97208, USA 2Interagency Special Status/Sensitive Species Program, USDI Bureau of Land Management Oregon State Office & USDA Forest Service Region 6, 1220 SW 3rd Ave., Portland, OR 97204, USA Gordon, M., and K. Van Norman. 2015. Bridgeoporus nobilissimus is much more abundant than indicated by the presence of basidiocarps in forest stands. North American Fungi 10(3): 1-28. http://dx.doi:10.2509/naf2015.010.003 Corresponding author: Matt Gordon
[email protected]. Accepted for publication May 4, 2015. http://pnwfungi.org Copyright © 2015 Pacific Northwest Fungi Project. All rights reserved. Abstract: The polypore Bridgeoporus nobilissimus produces large perennial basidiocarps on large diameter Abies stumps, snags and trees in coniferous forests of the Pacific Northwest. Despite the size and persistence of the basidiocarps, they are rarely observed, making the conservation of this species a concern. We determined that a genetic marker for this fungus could be detected in DNA extracted from wood cores taken from trees hosting basidiocarps. We then tested 105 trees and stumps that did not host B. nobilissimus basidiocarps in plots surrounding B. nobilissimus conks, and 291 trees and stumps in randomly located plots in four stands that contained at least one B. nobilissimus basidiocarp. We found that trees of all sizes throughout all of the stands hosted B.