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 ( borderline effects on pteridophyte biotic community in Atlantic rain t one(a) of the Una region, South of Bahia State, Brazil). Edge effects are one of the most important consequences of timber fragmentation. This paper concerns how natality and copiousness of pteridophytes vary when tone indoors and bounces are compared on the disconnected Una landscape, state of Bahia. All ferns found up to 1 m above the ground were collected on 36 parcels of one hundred twenty × 10 m. Six sampling units were complete on regular forest areas (> 900 ha) and six more on forest fragments (? speed of light ha). These units were allocated within three sampling blocks of 5 × 5 km over Una lands cape. Each 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 significant variation of abundance among examine units, although enormousness 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 significant difference to that of forest intimate. In addition interior and border of forests are exclusively different environments, regarding pteridophytes community. Forest interior communities are almost non affected by edge effects. Theref ore, border effects contract a short brain! storm on pteridophytes communities, although a round scale raise on the sum of borders might event on the extinction of some local forest species. lynchpin words - 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 want to take a shit a full essay, order it on our website: OrderEssay.net

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