Three hundred sixty-four lichen species in 105 genera have been identified from 84 sites in Yellowstone National Park; 190 species are reported from the park for the first time. About 41% of the species were
saxicolous, 25% were corticolous or lignicolous, 18% were terricolous, and
16% were on rotting wood, mosses, litter or other lichens. About 44% of the species were crustose, 34% were foliose, 7% were fruticose; the remaining,
including Cladonia, were squamulose or "pin" lichens. Twenty-nine species were collected from 20 or more sites (common), and 174 species were identified from three or fewer sites (rare). Douglas fir burned in 1988
is being recolonized by eight species, and burned soil in a Douglas fir forest
zone is being recolonized by Peltigera didactyla and P. rufescens. Forty-three
species have been reported as being sensitive or intermediately
sensitive to air pollutants. Bryoria fremontii and Letharia vulpina tissues
were analyzed for elemental content; except for mercury, the levels of most elements were similar to those recorded in other parts of the region.
Eversman, Sharon; Bennett, James P.; Wetmore, Clifford M.; Glew, Katherine.
Lichens of Yellowstone National Park Phase II: Final Report..
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