Estrutura da comunidade de anfíbios em poças temporárias em um fragmento de Mata Atlântica de Minas Gerais

• Autor(a) principal: Dayrell, Jussara Santos
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/2215
• topic: Colonização; Sobreposição; Comunidade; Anuros; Colonization; Community; Anuran amphibians; CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::TAXONOMIA DOS GRUPOS RECENTES

The understanding of the influence of environmental conditions on the composition and reproductive activity of amphibians may facilitate the understanding of the relation of these factors on the specie s activity, principally those exclusive to temporary puddles. The factors that regulate the reproductive pattern and the structure of a community of anuran amphibians were studied in two temporary ponds of the Zona da Mata de Minas Gerais from September 2007 to September 2008. The variables used to explain the number of species and abundance of calling males in each reproductive mode was daily rain, rain total for the previous 24 hours, total rainfall for the past 72 hours, rain in the next 24 hours, rain for the next 72 hours, average monthly air temperature and water levels of pools. Pianka s index of niche overlap was used to investigate the possibility of competition between species by vocalization sites over the months. The temporary pools sheltered 15 species grouped into six reproductive modes. The arrival of the species to temporary ponds was not synchronized, featuring a different colonization of frogs along the different stages of the ponds (without water, formation, stability and decline), and the succession related to reproductive modes. All the variables explained the number of species calling in temporary ponds with different responses to rainfall, air temperature and hydroperiod of the ponds. The variables of air temperature and hydroperiod contributed to explain the abundance of calling males of reproductive modes. None of the variables to the rainfall were significant. There was a co-occurrence between species with similar resource usage of calling sites per month, indicating that interspecific competition did not influence the community structure of anuran amphibians from temporary ponds. The major results of overlap were found among species phylogenetically closely related, showing the possible ecological relationship between them. The results suggest that the structure and pattern of reproductive activity in the community of anuran amphibians in temporary ponds are adjusted by specific patterns of climatic and environmental factors, due to the specific evolutionary and phenological differences of each species and each reproductive mode.