Artículos de revistas
Factors Affecting Seed Predation Of Eriotheca Gracilipes (bombacaceae) By Parakeets In A Cerrado Fragment
Registro en:
Acta Oecologica. , v. 33, n. 2, p. 240 - 245, 2008.
1146609X
10.1016/j.actao.2007.11.002
2-s2.0-40849102612
Autor
Francisco M.R.
Lunardi V.O.
Guimaraes Jr. P.R.
Galetti M.
Institución
Resumen
Psittacids are important pre-dispersal seed predators. However, little is known about the parameters that may determine seed predation rates by these birds, such as plants' characteristics and microhabitat. Eriotheca gracilipes (Bombacaceae) is a semi-deciduous tree widely distributed in the Brazilian cerrado. The fruits are dehiscent pods and the seeds are wind-dispersed. Some individuals lose their leaves during the fruiting season, getting very conspicuous. Here we tested the hypothesis that the absence of leaves in E. gracilipes during the fruiting season may increase pre-dispersal seed predation by psittacids. We also tested the hypotheses that (1) seed predation intensity increases with increasing plant size and (2) number of fruits, (3) seed predation decreases with the increasing number of conspecific plants in a range of 15 m, and (4) seed predation intensity is lower in plants with higher vegetation cover over their crowns. 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