Artículos de revistas
Fecundity, Dispersal And Predation Of Seeds Of Archontophoenix Cunninghamiana H. Wendl. & Drude, An Invasive Palm In The Atlantic Forest [fecundidade, Dispersão E Predação De Sementes De Archontophoenix Cunninghamiana H. Wendl. & Drude, Uma Palmeira Invasora Da Mata Atlântica]
Registro en:
Revista Brasileira De Botanica. , v. 29, n. 4, p. 587 - 594, 2006.
1008404
10.1590/S0100-84042006000400008
2-s2.0-34247150778
Autor
Christianini A.V.
Institución
Resumen
Understanding the basic biology of invasive species can help us to choose the best management strategies to deal with the invasion. I report the phenology, seed production and dispersal of Archontophoenix cunninghamiana, an Australian palm that is invading Atlantic forest fragments. Field work was done in a 10 ha forest fragment (Mata da Cuaso 23°34' S, 46°43' W). Archontophoenix produced bunches of fruits all year round, with a peak of mature fruits from October to February. Trees reach maturity around 18.5 cm DBH, each producing 4,119 ± 1,922 seeds year-1. Birds disperse the seeds, and nearly 15% of them escape post-dispersal seed predation during the time interval needed for germination. The spatial pattern of post-dispersal predation and the absence of pre-dispersal seed predation suggest a lack of specialized seed predators of Archontophoenix, as predicted by the enemy release hypothesis. Data obtained from this and other studies pointed out to a massive increase in seed production of A. cunninghamiana in a few years within the fragment. I suggest that this invasive palm can be taking advantage of the absence of Euterpe edulis Mart., a native palm which has similar biology, and was locally extinct due to human disturbances. 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