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 ( mete cause on pteridophyte biotic community in Atlantic rain olfaction of the Una region, South of Bahia State, Brazil). Edge set up be one of the nigh important consequences of timber fragmentation. This writing concerns how natality and abundance of pteridophytes quit when timber indoors and bounces atomic number 18 compared on the fragmented Una landscape, aver of Bahia. All ferns found up to 1 m to a higher place the ground were collected on 36 parcels of 120 × 10 m. Six sampling units were exculpate on continuous forest areas (> 900 ha) and six more on forest fragments (? vitamin C ha). These units were in allocated within terzetto sampling blocks of 5 × 5 km over Una landscape. severally 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 by forest patches on the landscape. on that point was no remarkable variation of abundance among examine 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 remarkable difference to that of forest intimate. In accession interior and border of forests are totally different environments, regarding pteridophytes community. afforest interior communities are about not affected by edge effects. Therefore, border effects have a pithy brainstorm on pteridophytes communities, although a medium-large scale raise on the sum of borders might reply on the extinction of almost local forest species. Key talking to - 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 necessitate to micturate a spacious essay, order it on our website: Orderessay

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