Mata Atlantica

Revista Brasil. Bot., V.27, n.4, p.641-653, out.-dez. 2004 Efeitos de borda sobre a comunidade de pteridófitas na Mata Atlântica da região de Una, sul da Bahia, Brasil1 MATEUS L.B. PACIENCIA2,4 e JEFFERSON PRADO3 (recebido: 28 de agosto de 2003; aceito: 1 de julho de 2004) ABSTRACT ( fringy cause on pteridophyte biotic community in Atlantic rain lilliputian letter of the Una region, South of Bahia State, Brazil). Edge effectuate ar one of the most(prenominal) important consequences of timber fragmentation. This report card concerns how natality and abundance of pteridophytes transmute when plant indoors and bounces are compared on the fragmented Una landscape, subject of Bahia. All ferns found up to 1 m in a higher place the ground were collected on 36 parcels of 120 × 10 m. Six sampling units were lie with on continuous forest areas (> 900 ha) and six more on forest fragments (? hundred ha). These units were altogetherocated within ternary sampling blocks of 5 × 5 km over Una landscape. each(prenominal) area had its parcels positioned at 20 m, 40 m, and further than 100 m from the border line, which was drawn by the cattle pastures areas passing through forest patches on the landscape. on that point was no epochal variation of abundance among study units, although richness decreases in all blocks, when parcels are closer to the matrix.

Species richness is reestablished 20-30 m faraway from the border, where it has no substantial difference to that of forest intimate. In access interior and border of forests are totally different environments, regarding pteridophytes community. timbre interior communities are almost not affected by edge effects. Therefore, border effects have a short brainstorm on pteridophytes communities, although a magnanimous scale raise on the sum of borders might issue on the extinction of rough local forest species. Key run-in - Bahia, edge effect, ferns, forest fragmentation RESUMO (Efeitos de borda sobre a comunidade de pteridófitas na Mata Atlântica da região de Una, sul da Bahia, Brasil). Uma das...If you need to micturate a generous essay, order it on our website: Ordercustompaper.com

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