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The conservation-refugium value of small and disturbed Brazilian Atlantic forest fragments for the endemic ovoviviparous cockroach Monastria biguttata (Insecta: Dictyoptera, Blaberidae, Blaberinae).
Pellens, Roseli; Grandcolas, Philippe.
Afiliação
  • Pellens R; UMR 5202 CNRS, Département Systématique et Evolution, Case 50, Muséum national d'Histoire naturelle, Paris, France. pellens@mnhn.fr
Zoolog Sci ; 24(1): 11-9, 2007 Jan.
Article em En | MEDLINE | ID: mdl-17409712
The Brazilian Atlantic forest is a biodiversity hotspot and harbors many endemic species showing peculiar and unique traits. However, it has been reduced to less than 8% of its original surface and is distributed in scattered fragments, the great majority of which are smaller than 20 hectares and very disturbed, making it worth asking about their value for conservation. In this paper we assess the refugium value of small fragments to the conservation of one of the endemics of the Atlantic forest, the ovoviviparous cockroach Monastria biguttata. Our results showed that this species was ubiquitous in large and small forest fragments, but never present in plantations or pastures. The population age structure and sex ratio were balanced in every fragment, and total population size in the smallest fragments was at least several hundreds of individuals. Colony size, sex ratio, age structure, and density per piece of dead tree trunk indicated that populations from small fragments were not unbalanced or at risk of extinction. According to the analysis of resource availability, small fragments can provide suitable habitat for this species. In this situation, even very small forest fragments have a high refugium value for some endemic insect species. Considering their number in the landscape, these fragments should be considered with more attention in strategies of biodiversity conservation.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Baratas / Ecossistema / Conservação dos Recursos Naturais Tipo de estudo: Risk_factors_studies Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Zoolog Sci Assunto da revista: BIOLOGIA Ano de publicação: 2007 Tipo de documento: Article País de afiliação: França País de publicação: Japão
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Baratas / Ecossistema / Conservação dos Recursos Naturais Tipo de estudo: Risk_factors_studies Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Zoolog Sci Assunto da revista: BIOLOGIA Ano de publicação: 2007 Tipo de documento: Article País de afiliação: França País de publicação: Japão