How the abiotic factors affect the ecology of amphibians.

Although temperature and precipitation are the most studied, atmospheric pressure seems to be the only factor that indicates the predictability of meteorological changes in the near future. It is, therefore, likely to be perceived by anurans that initiate reproduction before rainfall.

The anurans were monitored in the Municipality of Bocaina de Minas, State of Minas Gerais, Brazil, encompassing part of the Serra da Mantiqueira in the upper basins of Rio Preto and Rio Grande. Our objectives included analyzing species distribution by altimetry, determining the similarity of active species between river basins, testing the hypothesis that species within a river basin tend to vocalize in association, establishing the probability of species encounter in the sampling, categorizing the species’ constancy and dominance, analyzing the influence of temperature, relative humidity, rainfall and barometric pressure on the species’ vocal activity, and constructing a climogram to illustrate the range of these variables associated with the optimal, tolerant and rare occurrence of vocal activity.