Análise da diversidade e efeito de borda na assembleia de borboletas frugívoras da reserva Biologica de Sooretama
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2012-02-29
Autores
Nogueira, Talita Araújo
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Universidade Federal do Espírito Santo
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Considered to be one of the 34 hot spots of biodiversity on the planet, the Atlantic forest is largely threatened, mainly due to the processes of forest fragmentation, being the edge effects one of the consequences of fragmentation that most affect the remaining forest and its biota. In this context, the present study aims to inventory the species of frugivorous butterflies that occur in the Biological Reserve Sooretama - ES, and see how species are distributed in terms of wealth, abundance, diversity and similarity along an environmental gradient formed from the edge toward the interior of the fragment, testing the hypothesis that edge effects influence such distribution. The samples were taken in Sooretama Biological Reserve, which lies between the municipalties of Linhares, Sooretama and Jaguaré, northern of Espirito Santo state, in April, July and August 2011. "Van Someren-Rydon" modeltraps were used, containing a mixture of sugar cane juice with banana, fermented 48 hours before being used as bait. In each sampling period traps remained open for four consecutive days, and the captured specimens were collected and properly kept for subsequent assembly and identification. 199 exemplars distributed into 32 species belonging to six subfamilies of Nymphalidae were collected. The species accumulation curve did not stabilize and wealth estimator Bootstrap showed that frugivorous butterfly fauna has not been fully sampled. Through an analysis of adherence by the G test, it was found that the abundance and richness along the gradient set was not uniform across the sampling points, being demonstrated by the index of similarity a greater similarity between the closest sampling points among themselves. Detrended Correspondence Analysis (DCA) demonstrated two distinct clusters among the sampling points, being these groupings named "edge" and "inside the fragment," indicating a more similar species composition within each cluster. What might indicate that the edge effects affect the distribution of species within the assemblage of frugivorous butterflies that have been recorded in this study, a greater richness, abundance and species diversity from 1000 m to 2500 m.
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NOGUEIRA, Talita Araújo. Análise da diversidade e efeito de borda na assembleia de borboletas frugívoras da reserva Biologica de Sooretama. 2012. 72 f. Dissertação (Mestrado em Biodiversidade Tropical) - Universidade Federal do Espírito Santo, Centro Universitário Norte do Espírito Santo, São Mateus, 2012.