Mycorrhizae, mycorrhizal fungi and fungal biomass in subalpine tundra at Eagle Summit, Alaska

The root systems of 16 dominant higher plants in 6 tundra plant communities were examined for the presence of mycorrhizae. Six are ectomycorrhizal, one strictly ectendomycorrhizal, six endomycorrhizal, and three nonmycorrhizal. The higher fungi which fruited among these plants were identified and related to the plants with appropriate ectomycorrhizal associations. Fungal biomass was measured in each community and the mycorrhizal component discussed and estimated. New records of Alaskan species of higher fungi are presented along with new descriptions of mycorrhizae on two subalpine plants.