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Proc Biol Sci. 2001 November 22; 268(1483): 2391–2396.
PMCID: PMC1088891

Genetic rescue of remnant tropical trees by an alien pollinator.

Abstract

Habitat fragmentation is thought to lower the viability of tropical trees by disrupting their mutualisms with native pollinators. However, in this study, Dinizia excelsa (Fabaceae), a canopy-emergent tree, was found to thrive in Amazonian pastures and forest fragments even in the absence of native pollinators. Canopy observations indicated that African honeybees (Apis mellifera scutellata) were the predominant floral visitors in fragmented habitats and replaced native insects in isolated pasture trees. Trees in habitat fragments produced, on average, over three times as many seeds as trees in continuous forest, and microsatellite assays of seed arrays showed that genetic diversity was maintained across habitats. A paternity analysis further revealed gene flow over as much as 3.2 km of pasture, the most distant pollination precisely recorded for any plant species. Usually considered only as dangerous exotics, African honeybees have become important pollinators in degraded tropical forests, and may alter the genetic structure of remnant populations through frequent long-distance gene flow.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Aldrich PR, Hamrick JL. Reproductive dominance of pasture trees in a fragmented tropical forest mosaic . Science. 1998 Jul 3;281(5373):103–105. [PubMed]
  • Bermingham E, Dick C. Ecology and evolution. The Inga--newcomer or museum antiquity? Science. 2001 Sep 21;293(5538):2214–2216. [PubMed]
  • Dick CW, Hamilton MB. Microsatellites from the Amazonian tree Dinizia excelsa (Fabaceae). Mol Ecol. 1999 Oct;8(10):1765–1766. [PubMed]
  • Marshall TC, Slate J, Kruuk LE, Pemberton JM. Statistical confidence for likelihood-based paternity inference in natural populations. Mol Ecol. 1998 May;7(5):639–655. [PubMed]
  • Phillips OL, Hall P, Gentry AH, Sawyer SA, Vásquez R. Dynamics and species richness of tropical rain forests. Proc Natl Acad Sci U S A. 1994 Mar 29;91(7):2805–2809. [PubMed]
  • White GM, Boshier DH, Powell W. Genetic variation within a fragmented population of swietenia humilis zucc. Mol Ecol. 1999 Nov;8(11):1899–1909. [PubMed]

Articles from Proceedings of the Royal Society B: Biological Sciences are provided here courtesy of The Royal Society