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Landscape Ecology - Eric B. Peterson |
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Abstract of oral or poster presentation: SULCARIA BADIA, A RARE LICHEN IN WESTERN NORTH AMERICA. Peterson, E. B. Oregon State University, Corvallis. Sulcaria badia, a rare fruticose lichen endemic to western North America, had not been collected since 1971 despite several decades of field work near the type location. The lichen had been collected only from branches of Quercus garryana and cultivated apple trees in 3 counties of California, Oregon, and Washington. A search was undertaken to determine the current range of the species. S. badia was found in hardwood trees, mainly Q. garryana, up to 60 km inland, and in coastal Pinus contorta var. contorta forests. We found extant populations in 4 counties of California and Oregon. The Washington population appears to have been extirpated. A large biomass was found only in exceptionally large Q. garryana in California. Most populations are in danger of losses due to pollution and tree removal of human settlement. S. badia was accepted in 1996 to the world red-list of lichens with the status "critically endangered". Presented at the 1997 meeting of the Northwest Science Association HOME : Info |