Climatic suitability ranking of biological control candidates: a biogeographic approach for ragweed management in Europe

Détails

Ressource 1Télécharger: Sun_et_al-2017-Ecosphere.pdf (7783.39 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_DA1A80FEFEC5
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Climatic suitability ranking of biological control candidates: a biogeographic approach for ragweed management in Europe
Périodique
Ecosphere
Auteur(s)
Sun Y., Broennimann O., Roderik G.K., Poltavsky A., Lommen S., Müller-Schärer H.
ISSN
2150-8925
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
8
Numéro
4
Pages
e01731
Langue
anglais
Résumé
Biological control using natural antagonists has been a most successful management tool against alien invasive plants that threaten biodiversity. The selection of candidate agents remains a critical step in a biocontrol program before more elaborate and time-consuming experiments are conducted. Here, we propose a biogeographic approach to identify candidates and combinations of candidates to potentially cover a large range of the invader. We studied Ambrosia artemisiifolia (common ragweed), native to North America (NA) and invasive worldwide, and six NA biocontrol candidates for the introduced Europe (EU) range of ragweed, both under current and future bioclimatic conditions. For the first time, we constructed species distribution models based on worldwide occurrences and important bioclimatic variables simultaneously for a plant invader and its biocontrol candidates in view of selecting candidates that potentially cover a large range of the target invader. Ordination techniques were used to explore climatic constraints of each species and to perform niche overlap tests with ragweed. We show a large overlap in climatic space between candidates and ragweed, but a considerable discrepancy in geographic range overlap between EU (31.4%) and NA (83.3%). This might be due to niche unfilling and expansion of ragweed in EU and the fact that habitats with high ragweed occurrences in EU are rare in NA and predicted to be unsuitable for the candidates. Total geographic range of all candidates combined is expected to decrease under climate change in both ranges, but they will respond differently. The relative geographic coverage of a plant invader by biocontrol candidates at home is largely transferable to the introduced range, even when the invader shifts its niche. Our analyses also identified which combination of candidates is expected to cover the most area and for which abiotic conditions to select in order to develop climatically adapted strains for particular regions, where ragweed is currently unlikely to be controlled.
Mots-clé
Ambrosia artemisiifolia, biological invasions, climate change, niche overlap, species distribution model
Web of science
Open Access
Oui
Création de la notice
20/03/2017 15:17
Dernière modification de la notice
20/08/2019 15:59
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