Chance long-distance or human-mediated dispersal? How Acacia s.l. farnesiana attained its pan-tropical distribution

Détails

Ressource 1Télécharger: Bell et al 2017 RSOS farnesiana.pdf (634.62 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_1726A8722C69
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Chance long-distance or human-mediated dispersal? How Acacia s.l. farnesiana attained its pan-tropical distribution
Périodique
Royal Society Open Science
Auteur(s)
Bell K. L., Rangan H., Fernandes M. M., Kull C. A., Murphy D. J.
ISSN
2054-5703
Statut éditorial
Publié
Date de publication
04/2017
Peer-reviewed
Oui
Volume
4
Numéro
4
Pages
NA
Langue
anglais
Résumé
Acacia s.l. farnesiana, which originates from Mesoamerica, is the most widely distributed Acacia s.l. species across the tropics. It is assumed that the plant was transferred across the Atlantic to southern Europe by Spanish explorers, and then spread across the Old World tropics through a combination of chance long-distance and human-mediated dispersal. Our study uses genetic analysis and information from historical sources to test the relative roles of chance and human-mediated dispersal in its distribution. The results confirm the Mesoamerican origins of the plant and show three patterns of human- mediated dispersal. Samples from Spain showed greater genetic diversity than those from other Old World tropics, suggesting more instances of transatlantic introductions from the Americas to that country than to other parts of Africa and Asia. Individuals from the Philippines matched a population from South Central Mexico and were likely to have been direct, trans-Pacific introductions. Australian samples were genetically unique, indicating that the arrival of the species in the continent was independent of these European colonial activities. This suggests the possibility of pre-European human- mediated dispersal across the Pacific Ocean. These significant findings raise new questions for biogeographic studies that assume chance or transoceanic dispersal 2 for disjunct plant distributions.
Mots-clé
Acacia farnesiana, cryptogenic species, human-mediated dispersal, pan-tropical species, transoceanic dispersal, Vachellia farnesiana
Pubmed
Web of science
Open Access
Oui
Création de la notice
20/03/2018 14:36
Dernière modification de la notice
08/05/2019 15:00
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