The worldwide expansion of the Argentine ant

Détails

Ressource 1Télécharger: BIB_1131F924A05B.P001.pdf (541.05 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_1131F924A05B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The worldwide expansion of the Argentine ant
Périodique
Diversity and distributions
Auteur(s)
Vogel V., Pedersen J. S., Giraud T., Krieger M. J. B., Keller L
ISSN
1366-9516
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
16
Numéro
1
Pages
170-186
Langue
anglais
Résumé
Aim The aim of this study was to determine the number of successful establishments of the invasive Argentine ant outside native range and to see whether introduced supercolonies have resulted from single or multiple introductions. We also compared the genetic diversity of native versus introduced supercolonies to assess the size of the propagules (i.e. the number of founding individuals) at the origin of the introduced supercolonies. Location Global. Methods We used mitochondrial DNA (mtDNA) markers and microsatellite loci to study 39 supercolonies of the Argentine ant Linepithema humile covering both the native (n = 25) and introduced range (n = 14). Results Data from three mitochondrial genes and 13 nuclear microsatellites suggest that the introduced supercolonies studied originated from at least seven founding events out of the native area in Argentina (primary introductions). The distribution of mtDNA haplotypes also suggests that supercolonies in the introduced range each derive from a single source supercolony and that one of these source supercolonies has been particularly successful, being the basis of many introduced populations spread across the world. Comparison of the genetic diversity of supercolonies based on the five most diverse loci also revealed that native and introduced supercolonies have greatly overlapping ranges of diversity, although the genetic diversity is on average less in introduced than in native supercolonies. Main conclusions Both primary introductions (from the native range) and secondary introductions (from sites with established invasive supercolonies) were important in the global expansion of the Argentine ant. In combination with the similar social organization of colonies in the native and introduced range, this indicates that invasiveness did not evolve recently as a unique and historically contingent event (e.g. reduction of genetic diversity) in this species. Rather, native L. humile supercolonies have characteristics that make them pre-adapted to invade new - and in particular disturbed - habitats when given the opportunity. These results have important implications with regard to possible strategies to be used to control invasive ants.
Mots-clé
Biological invasions, genetic bottlenecks, invasion history, Linepithema humile, social insects, supercolonies
Web of science
Open Access
Oui
Création de la notice
19/10/2009 0:39
Dernière modification de la notice
20/08/2019 12:38
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