@article {3225, title = {Influence of Bark Ph on the Occurrence and Distribution of Tree Canopy Myxomycete Species}, journal = {Mycologia}, volume = {100}, year = {2008}, month = {March- April}, pages = {191-204}, keywords = {Acid rain, Forest canopy, Hemlocks, Slime molds}, author = {Everhart, Sydney E and Harold W. Keller and Joseph S. Ely} }