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Removal of seeds from frugivore defecations by ants in a Costa Rican rain forest

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Frugivory and seed dispersal: ecological and evolutionary aspects

Part of the book series: Advances in vegetation science ((AIVS,volume 15))

Abstract

At our Costa Rican field site, seeds defecated by frugivorous birds usually do not remain where they have been deposited. Many species of ants are attracted to frugivore defecations and remove seeds and/or pulp. Pheidole species selectively remove seeds, fungus-growing species (tribe Attini) remove both pulp and seeds. Seeds of many Melastomataceae have an appendage, which we hypothesized is an elaiosome. Indeed, preference trials demonstrated that two species of Pheidole selected seeds with the appendage over seeds of the same species in which the appendage had been removed. However, we found that these ants did not take the appendage when it was offered by itself. We conclude that the appendage is not an elaiosome. In further trials, different ant species preferentially selected different seed species. These ants consumed some seeds and deposited others unharmed in refuse piles. We conclude that because the composition of leaf-litter ant communities is highly variable between neighboring square meter plots, and the probability of seed predation depends upon the species of ant, the over-all effect of ants on seed shadows and seed banks is spatially unpredictable.

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Authors and Affiliations

  1. Department of Zoology, University of Florida, Gainesville, FL, 32611, USA

    M. M. Byrne & D. J. Levey

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  1. M. M. Byrne
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  2. D. J. Levey
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T. H. Fleming A. Estrada

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© 1993 Springer Science+Business Media Dordrecht

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Byrne, M.M., Levey, D.J. (1993). Removal of seeds from frugivore defecations by ants in a Costa Rican rain forest. In: Fleming, T.H., Estrada, A. (eds) Frugivory and seed dispersal: ecological and evolutionary aspects. Advances in vegetation science, vol 15. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1749-4_25

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  • DOI: https://doi.org/10.1007/978-94-011-1749-4_25

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-4767-8

  • Online ISBN: 978-94-011-1749-4

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