The export of mass and nutrients associated with the formation of fungal sporocarps during the first 7 years of decomposition of logs of four conifer species (AbiesamabilisDougl. ex Forbes,Pseudotsugamenziesii(Mirb.) Franco,ThujaplicataD. Don, andTsugaheterophylla(Raf.) Sarg.) was investigated in western Oregon. Abundance of the most common fungal species,Naematolomacapnoides(Fr.:Fr.) P. Kumm, differed significantly with log species; the fungus was most abundant onAbiesand least abundant onThuja. Fungi increased concentrations of N, K, and P over those found in associated logs by as much as 38, 115, and 136 times, respectively. Thus, a fair proportion of the initial N (0.9–2.9%), K (1.8–4.5%), and P (1.9–6.6%) was transported out of logs via sporocarps at a time when immobilization would have been predicted from critical element ratios (e.g., C/N).