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Efeito da chuva na captura de morcegos em uma ilha da costa sul do Rio de Janeiro, Brasil

2012; Volume: 17; Issue: 1 Linguagem: Inglês

2317-6105

William Douglas de Carvalho, Lorena Nicolay Freitas, Gustavo Pena Freitas, Júlia Lins Luz, Luciana de Moraes Costa, Carlos Eduardo Lustosa Esbérard,

Species Distribution and Climate Change

Climatic factors are difficult to be analyzed because of their intrinsic unpredictability. For example, rain and wind occur in different intensities and in different nights each year. The objective of this work was to analyze the effects of the rain in the capture success of bats in an island in southeastern Brazil. A total of 31 sampling nights resulted in 2000 captures of 28 species, 1507 of which were obtained in nights without rain and 493 captures in rainy nights. The relationship between the total of captures and the species richness was observed for nights without rain as for rainy nights. The species richness and the capture efficiency in every night for all of the species were significantly higher for the nights without rain. The differences in feeding guilds were observed for the insectivorous species among the nights without rain and with rain heavy intensity, and nectar-feeding species among nights without rain and with rain intensities moderate and heavy. Heavy rain shows different effects in the bat species, generally inhibiting the activity or reducing the capture frequency