Recurrent bridgehead effects accelerate global alien ant spread.

Détails

Ressource 1Télécharger: PNASsecondaryintroductions.pdf (4228.97 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_F646D9E8DAF7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Recurrent bridgehead effects accelerate global alien ant spread.
Périodique
Proceedings of the National Academy of Sciences of the United States of America
Auteur(s)
Bertelsmeier C., Ollier S., Liebhold A.M., Brockerhoff E.G., Ward D., Keller L.
ISSN
1091-6490 (Electronic)
ISSN-L
0027-8424
Statut éditorial
Publié
Date de publication
2018
Peer-reviewed
Oui
Volume
115
Numéro
21
Pages
5486-5491
Langue
anglais
Résumé
Biological invasions are a major threat to biological diversity, agriculture, and human health. To predict and prevent new invasions, it is crucial to develop a better understanding of the drivers of the invasion process. The analysis of 4,533 border interception events revealed that at least 51 different alien ant species were intercepted at US ports over a period of 70 years (1914-1984), and 45 alien species were intercepted entering New Zealand over a period of 68 years (1955-2013). Most of the interceptions did not originate from species' native ranges but instead came from invaded areas. In the United States, 75.7% of the interceptions came from a country where the intercepted ant species had been previously introduced. In New Zealand, this value was even higher, at 87.8%. There was an overrepresentation of interceptions from nearby locations (Latin America for species intercepted in the United States and Oceania for species intercepted in New Zealand). The probability of a species' successful establishment in both the United States and New Zealand was positively related to the number of interceptions of the species in these countries. Moreover, species that have spread to more continents are also more likely to be intercepted and to make secondary introductions. This creates a positive feedback loop between the introduction and establishment stages of the invasion process, in which initial establishments promote secondary introductions. Overall, these results reveal that secondary introductions act as a critical driver of increasing global rates of invasions.
Mots-clé
biological invasions, globalization, invasive ants, propagule pressure, secondary introductions
Pubmed
Web of science
Open Access
Oui
Création de la notice
09/04/2018 15:45
Dernière modification de la notice
09/05/2019 3:35
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