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Corpus Systématique Animale

Titre du document

Patterns of success in passeriform bird introductions on Saint Helena

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Mots-clés d'auteur
  • Saint Helena
  • Introductions
  • Competition
  • Birds
  • Community
Nom du fichier dans la ressource
  • Richard K. Brooke 1
  • Julie L. Lockwood 2
  • Michael P. Moulton 3
  • 1) Percy FitzPatrick Institue of African Ornithology, University of Cape Town, 7700, Rondebosch, South Africa
  • 2) Department of Ecology and Evolutionary Biology, University of Tennessee, 37996-0810, Knoxville, TN, USA
  • 3) Department of Wildlife and Range Sciences, University of Florida, 32611-0430, Gainesville, FL, USA

Ecologists have long attempted to predict the success of species that are introduced into foreign environments. Some have emphasized qualities intrinsic to the species themselves, whereas others have argued that extrinsic forces such as competition may be more important. We test some of the predictions made by both the extrinsic and intrinsic hypotheses using passeriform birds introduced onto the island of Saint Helena. We found direct evidence that extrinsic forces are more important predictors of successful invasion. Species introduced when fewer other species were present were more likely to be successful. In a direct test of the alternative hypothesis that intrinsic forces play a more prominent role in success or failure, we found a tendency for species which successfully established on Saint Helena to be also successful when introduced elsewhere. However, the vast majority of species unsuccessful at establishing on Saint Helena had probabilities of success outside Saint Helena of 50% or greater, making this result somewhat equivocal. Finally, we found no evidence to support the hypothesis that species that are successful early are those that are intrinsically superior invaders. These results are consistent with similar analyses of the introduced avian communities on Oahu, Tahiti, and Bermuda.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
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