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Research article2006Peer reviewed

Suillus tomentosus tuberculate ectomycorrhizal abundance and distribution in Pinus contorta woody debris

Paul LR, Chapman BK, Chanway CP


Tuberculate ectomycorrhizae (TEM) have been observed in decaying coarse woody debris (CWD) and may play a role in the nitrogen economy of forests. This study evaluates the occurrence of Suillus tomentosus (Kauff.) Singer, Snell and Dick TEM within CWD in Pinus contorta Dougl. ex Loud. var. latifolia Engelm. stands and relates their occurrence to CWD and soil characteristics as well as stand age. TEM were more abundant in the basal end of CWD incorporated in the forest floor than in the middle and top portions. Tubercle abundance was positively correlated with moisture and texture of CWD, degree of incorporation of CWD into the forest floor, and the amount of roots within CWD. There were significantly more TEM in CWD in young stands than in old stands and on sites with granitic soils than on sites with basaltic soils. Highly degraded CWD that is well incorporated in the forest floor appears to be an important microhabitat for the formation and occurrence of TEM

Published in

Canadian Journal of Forest Research
2006, Volume: 36, number: 2, pages: 460-466 Publisher: NATL RESEARCH COUNCIL CANADA