22 research outputs found
Trophic structure of a neotropical frugivore community: is there competition between birds and bats?
Dietary overlap and competition between frugivorous birds and bats in the Neotropics have been presumed to be low, but comparative data have been lacking. We determined the diets of volant frugivores in an early successional patch of Costa Rican wet forest over a one month period. Ordination of the diet matrix by Reciprocal Averaging revealed that birds and bats tend to feed on different sets of fruits and that diets differed more among bat species than among bird species. However, there was overlap between Scarlet-rumped Tanagers and three Carollia bat species on fruits of several Piper species which comprised most of the diet of these bats. Day/night exclosure experiments on P. friedrichsthalli treetlets provided evidence that birds deplete the amount of ripe fruit available to bats. These results indicate that distantly related taxa may overlap in diet and compete for fruit, despite the apparent adaptation of animal-dispersed plant species for dispersal by particular animal taxa.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47779/1/442_2004_Article_BF00384321.pd
Bird community in a forest patch isolated by the urban matrix at the Sinos River basin, Rio Grande do Sul state, Brazil, with comments on the possible local defaunation
Avian extinctions from tropical and subtropical forests
10.1146/annurev.ecolsys.35.112202.130209Annual Review of Ecology, Evolution, and Systematics35323-34
Habitat islands and the equilibrium theory of island biogeography: testing some predictions
The fruits of selectivity: how birds forage on Goupia glabra fruits of different ripeness
Conservation of tropical birds: Mission possible?
10.1007/s10336-007-0180-yJournal of Ornithology148SUPLL. 2S305-S30