The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

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pdf 02. Anuran species distribution along an elevational gradient and seasonal comparisons of leaf litter frogs in an Atlantic Rainforest area of southeastern Brazil

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pp. 75-81
Authors: Goyannes-Araújo, Pablo; Siqueira, Carla Costa; Laia, Rafael Camilo; Almeida-Santos, Marlon; Guedes, Diego Medeiros & Rocha, Carlos Frederico Duarte

Abstract: Documenting elevational gradients in species richness is important to understand the determinants of spatial distributions. We studied anuran richness along an elevational gradient in an Atlantic Rainforest area to evaluate i) how anuran richness and elevation are related; ii) if the data support the hypothesis of the mid-domain effect or the Rapoport effect and iii) if there is seasonal variation in species richness and abundance of leaf litter anurans in the studied site. Sampling was carried out using time-constrained visual encounter surveys and plot (quadrat) methods at six elevational levels. We found 406 individuals belonging to 19 anuran species. The most abundant frog species were Ischnocnema parva (6.2 individuals per 100 m2) and Adenomera marmorata (2.0 individuals per 100 m2). The overall leaf litter frog abundance was 11.2 ind/100 m2, with highest values at 150 m (26.6 ind/100 m2) and 300 m (25.6 ind/100 m2) elevations. We found high species turnover across altitudes. Our data neither supported the mid-domain effect nor the elevational Rapoport effect. There was no significant difference in frog abundance among seasons, although most of the leaf litter frogs species were found in the wet season (235 individuals or 69.3%). Our study demonstrates a high local frog species richness and abundance in combination with an abundance decreasing with elevation.

Keywords: AMPHIBIA, MID-DOMAIN EFFECT, ALTITUDE, RANGE SIZE, MONTANE RAINFOREST, RAPOPORT EFFECT

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