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Esseen, PA/ Ericson, L/ Lindström, H/ Zackrisson, O 1981: Occurrence and ecology of Usnea longissima in central Sweden. - Lichenologist 13: 177-190. [RLL List # 111-24 / Rec.# 5187]
Keywords: SWEDEN/ USNEA/ ECOLOGY/ AIR POLLUTION/ FORESTRY/ DISPERSAL
Abstract: 3 tables. 3 figures. [A study of populations of Usnea longissima at 31 localities indicated that the observed decline was due to various forestry practices and, to a minor extent, air pollution. "Specific habitat demands and low dispersal ability make U. longissima very senstive to environmental distrurbances."]

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