Print version ISSN 0101-8175
Rev. Bras. Zool. vol.14 no.2 Curitiba 1997
Diversity and abundance of litter frogs at altitudinal sites at Serra do Japi, southeastern Brazil
Ariovaldo Antonio Giaretta; Ricardo J. Sawaya; Glauco Machado; Márcio S. Araújo; Kátia G. Facure; Hermes F. de Medeiros; Renato Nunes
Departamento de Zoologia, Instituto de Biologia, Universidade Estadual de Campinas. Caixa Postal 6109, 13083-970 Campinas, São Paulo, Brasil
It was sampled the litter frogs at altitudinal sites of a semideciduous mesophytic forest located at Sena do Japi (Jundiaí, São Paulo, 23º17'S, 47º00'W, 800-1300m altitude, 1500mm rain/year). Forty two plots of 8x8m were sampled in the dry/cold season of 1995: 21 at a Higher Site (HS) (1000m) and 21 at a Lower Site (LS) (850m). The plots were evenly located near, mid-distance, and far from the stream-bed. It was found a total of five species, three at each site. Eleutherodactylus guentheri comprised 83% of the individuals at HS and E. juipoca 67% at LS. The density of individuals was higher at HS and near the stream. The greater density at HS may be due to greater humidity there, provided by mist. The frogs may aggregate in wetter places (stream edges) in the dry/cold season. The studied sites represent harsh and early successional environments and both these factors may be acting together to produce the low observed diversity.
Key words: Brachycephalus, Eleutherodactylus, Hyla, litter frogs, diversity, Southeastern Brazil
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ACKNOWLEDGMENTS. We thank the Prefeitura Municipal de Jundiaí for logistical support; M.A. Costa helped in the field work; C.F. da Rocha, I. Sazima, R.W. Heyer and A.J. Cardoso critically read the draft. Two anonymous reviewers made useful comments. Grants by CNPq (AAG) and CAPES (KGF and MSA).
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Recebido em 20.XII.1995; aceito em 10.VI.1997.