This fungus is normally found on dead conifers, but can also be observed growing on large stem wounds, broken tops, and dead tissue of live trees. In mature forests, these stem decay fungi cause enormous annual wood volume loss of Alaska’s major tree species. Approximately one-third of the old-growth timber board-foot volume in Southeast Alaska is defective, largely due to decay from this type of fungus. Conversely, there is very little decay in young-growth stands without prevalent wounding from commercial thinning activities, wind damage, or animal feeding. By predisposing large old trees to bole breakage and windthrow, stem decays serve as important small-scale disturbance regimes in these temperate rainforest ecosystems where fire and other large-scale disturbances are uncommon.