Avifauna structure in a forest remnant in the North of the State of Rio Grande do Sul, Brazil
DOI:
https://doi.org/10.4013/nbc.2015.103.03Abstract
The avifauna of a 70-ha forest fragment located in the North of the state of Rio Grande do Sul, southern Brazil was analyzed. The trophic structure, preferential habitats, relative abundance, and frequency of occurrence of the species were studied, with the aim of analyzing the conservation status of the sampled area. Pre-existing trails in the fragment were used as linear transects and they were monthly coursed between October 2012 and September 2013. Hundred-twenty species of birds were recorded; November and December 2012 had the highest bird abundance and species richness. Forty-two species were registered in 25% of the samples and 39 species in 25.1% - 50% of the samples. The trophic categories with highest diversity were insectivorous, omnivorous and frugivorous. The obtained data indicated that the sampling area plays an important role in the conservation of the local avifauna, housing many species with dependence of environments showing low levels of human disturbance.
Keywords: abundance, species richness, birds.
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