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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.18  supl.1 Curitiba July 2001

http://dx.doi.org/10.1590/S0101-81752001000500014 

Composição de gastrópodes terrestres em duas áreas do Centro de Estudos Ambientais e Desenvolvimento Sustentado (CEADS), Vila Dois Rios, Ilha Grande, Rio de Janeiro, Brasil - um estudo-piloto

 

Composition of terrestrial gastropods in two areas of the Center to Environmental Studies and Sustainable Development (CEADS), Vila Dois Rios, Ilha Grande, Angra dos Reis, Rio de Janeiro, Brazil - a preliminary study

 

 

Sonia Barbosa dos SantosI; Daniele Pedrosa MonteiroII

ILaboratório de Malacologia, Departamento de Biologia Animal e Vegetal, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro. Rua São Francisco Xavier 524, 20550-900 Rio de Janeiro, Brasil. E-mail: sbsantos@uerj.br
IIBolsista de Iniciação Científica SR-2/UERJ, 97-99. E-mail: danielepm@hotmail.com

 

 


ABSTRACT

A survey of the Ilha Grande land snails was carried out in order to compare the diversity and similarity among two regions of secondary Atlantic Rain Forest. The diversity was estimated using the richness and the equitatibility; the alpha diversity was calculated using the Simpson index (γ). The Sörensen and Jaccard indexes were used to calculate the similarity. A quantitative survey of two 600 m2 area, one in each studied region, recorded 336 individuals snails distributed in 23 species and 13 families. The region with more altered secondary forest showed higher richness (17) and diversity (γ = 3,6) than the region more preserved (richness = 14; γ = 2,78), but, the same equitatibility (0,20). The similarity was medium by Jaccard index (IJ = 0,52) and low by Sorensen index (IS = 0,15). These differences could be explained by the dominance of Subulinidae (four species and 117 specimens) in the more altered region and Systrophiidae in the more preserved (four species and 97 specimens).

Key words: Terrestrial gastropods, diversity, ecology, Rio de Janeiro, Brazil


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

AGRADECIMENTOS. A SR-2/UERJ pela concessão da Bolsa de Iniciação Científica. A Coordenadoria dos Campi Regionais (CCR-UERJ) por viabilizar a realização da parte prática deste trabalho. A Dra Norma Campos Salgado do Museu Nacional do Rio de Janeiro pela identificação de várias espécies, ao Dr. José Willibaldo Thomé pela determinação dos Veronicellidae e ao MSc Álvaro L. M. da Fonseca pela identificação dos Charopidae e Helicodiscidae. Aos Professores Alexandre Pedrini. Rosana Mazzoni e Elizabeth Rios pela leitura crítica e sugestões oferecidas a este trabalho e a Alexandre Santos de Alencar pelo auxílio nos trabalhos de campo.

 

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Recebido em 18.V.2000; aceito em 26.VI.2001.

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