Ecologia e conservação de anfíbios anuros do estado de Goiás

• Autor(a) principal: Guimarães, Lorena Dall´Ara
• Data de Publicação: 2006
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/001300000djw5
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/7331
• topic: Anuros; Biodiversidade; Cerrado; Composição de comunidades; Conservação; Alteração de hábitas; Anurans; Biodiversity; Cerrado; Community composition; Conservation; Habitat alteration; CIENCIAS BIOLOGICAS::BIOLOGIA GERAL

This study aimed to examine patterns of anuran species richness in twenty municipalities in the State of Goiás, central Brazil. We also compared richness of anuran species among these localities and verified the patterns of spatial distribution for four habitat types (gallery forests, ponds associated to gallery forest, ponds associated to cerrado sensu stricto, and ponds close to anthropic area). Surveys were conducted between 2001 and 2005. Considering the four habitat types, a total of 6,491 individuals from 52 anuran species were registered. Calling males were found on the ground, shrubs, and grasses. Ponds associated to cerrado sensu stricto showed the highest species richness. In contrast, gallery forest assemblages exhibited the highest species diversity and equitability. The largest number of individuals was found in disturbed areas and ponds associated to cerrado sensu stricto. Similarity analysis showed that open habitats had the most similar communities, while the most dissimilar assemblages were observed between gallery forests and ponds within disturbed areas. Seven species in the families Leptodactylidae and Hylidae showed significant indicative values (bioindicators) for particular habitats. A total of 61 species was registered in twenty municipalities, representing 44.7% of the anuran richness registered for the Cerrado. The highest species richness was found in the municipality of Silvânia, while the lowest richness was registered in Mundo Novo. The results showed a non-significant correlation between socio-economics variables and anuran species composition. Anuran species richness seems to be lower close to areas used for the establishment of pastures and agriculture. On the other hand, species richness tends to be higher (likely through succession) in areas without human disturbance. Results of this study could or should be considered during development of management strategies focusing on amphibian conservation in the Cerrado biome. Moreover, a better understanding of how different fragmentation degrees affect amphibian diversity is important to access the influence of habitat quality on Cerrado´s amphibians, and also to improve management programs focused on amphibian conservation.