lichens;forest;Araucaria angustifolia

Os liquens s??o importantes componentes ep??fitos em ??reas florestais, sendo que altera????es antr??picas destas ??reas podem levar a modifica????es substanciais na diversidade e distribui????o espacial das esp??cies. Este trabalho investiga como a composi????o, riqueza, abund??ncia, diversidade e distribui????o vertical de esp??cies de liquens podem ser modificadas quando a floresta nativa ?? substitu??da por planta????es de monoculturas florestais. A comunidade liqu??nica foi estudada na Floresta Nacional de S??o Francisco de Paula, no sul do Brasil em tr??s repeti????es dos seguintes tipos de vegeta????o florestal: Floresta Ombr??fila Mista e planta????es florestais de Arauc??ria, Pinos e de Eucaliptos, totalizando 12 ??reas. Em cada ??rea, dez for??fitos foram amostrados aleatoriamente com um total de 120 for??fitos distribu??dos nos quatro ambientes. Os liquens foram avaliados entre 30 cm e 150 cm de altura do tronco em cada for??fito. Foram registradas 113 esp??cies de liquens, sendo 78 no levantamento de compara????o entre ambientes e 35 em cLichens are important epiphytic components of forests, however anthropogenic alterations of forest habitats could lead to substantial modifications in the diversity and species spatial distribution of lichens. This work investigates how species composition, richness, abundance, diversity and vertical distribution of lichens in tree trunks could be modified when native forest is replaced by forest monocultures. The lichen community was studied in the National Forest of S??o Francisco de Paula, southern Brazil, in three replicates of the following vegetation types: native Araucaria forest, and plantations of Araucaria, Pinus and Eucalyptus, 12 areas in total. In each area, ten host-trees were randomly chosen, with a total of 120 host-trees sampled in the four habitats. In each host ???tree, lichens were surveyed from 30 to 150 cm in trunk height. There were 113 lichen species registered, 78 in the survey and 35 in an additional non systematic survey. Five new species to science were encountered, eight new citatio