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Lichenological surveys; Plants--Effect of fires on


Soil and tree lichens were studied on the Helen Allison Savanna in Anoka County, Minnesota. Sample plots established in parts of the savanna have had fires at various time frequencies, and one section has had no recent fires. Fire has not eliminated any lichen species on the trees but has reduced their frequency in the lower trunk plots. Most soil species of lichens are eliminated by even infrequent fires. Fifty two species were found on trees and 13 species on the soil.

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