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Relative roles of climatic suitability and anthropogenic influence in determining the pattern of spread in a global invader

Because invasive species threaten the integrity of natural ecosystems, a major goal in ecology is to develop predictive models to determine which species may become widespread and where they may invade. Indeed, considerable progress has been made in understanding the factors that influence the local pattern of spread for specific invaders and the factors that are correlated with the number of introduced species that have become established in a given region. However, few studies have examined the relative importance of multiple drivers of invasion success for widespread species at global scales. Here, we use a dataset of >5,000 presence/absence records to examine the interplay between climatic suitability, biotic resistance by native taxa, human-aided dispersal, and human modification of habitats, in shaping the distribution of one of the world’s most notorious invasive species, the Argentine ant (Linepithema humile). Climatic suitability and the extent of human modification of habitats are primarily responsible for the distribution of this global invader. However, we also found some evidence for biotic resistance by native communities. Somewhat surprisingly, and despite the often cited importance of propagule pressure as a crucial driver of invasions, metrics of the magnitude of international traded commodities among countries were not related to global distribution patterns. Together, our analyses on the global-scale distribution of this invasive species provide strong evidence for the interplay of biotic and abiotic determinants of spread and also highlight the challenges of limiting the spread and subsequent impact of highly invasive species

We acknowledge financial support from the Centre of Excellence for Invasion Biology (N.R.-P. and D.M.R.), from the Catalan Agency for Management of University and Research Grants (Generalitat de Catalunya) through Beatriu de Pinós Postdoctoral Grants 2006 BP-A 10124 and 2008 BP-B 00042 (to N.R.-P.), from the Hans Sigrist Foundation (to D.M.R.), from the Spanish Ministry of Science and Innovation Grant CGL2007-64080-C02-02/BOS (to C.G. and N.R.-P.), from the Spanish Ministry of Science and Innovation and the European Regional Development Fund Grant CGL2007-64080-C02-01/BOS (to X.E.), from the Blue Skies Programme of the National Research Foundation (to C.H.), from the Danish National Research Foundation (to J.S.P.), from Department of Energy–Program for Ecosystem Research Grant DE-FG02-08ER64510 (to N. J.S.), from National Science Foundation Grant DEB 0716966 (to A.V.S.), and from the New Zealand Foundation for Research, Science, and Technology Grant C09X0507 (to D.W.)

© Proceedings of the National Academy of Sciences of the United States of America, 2011, vol. 108, núm. 1, p. 220-225

National Academy of Sciences

Author: Roura i Pascual, Núria
Hui, Cang
Ikeda, Takayoshi
Leday, Gwénaël
Richardson, David M.
Carpintero, Soledad
Espadaler, Xavier
Gómez López, Crisanto
Guénard, Benoit
Hartley, Stephen
Krushelnycky, Paul
Lester, Philip J
McGeoch, Melodie A.
Menke, Sean B.
Pedersen, Jes Søe
Pitt, Joel P. W.
Reyes, Joaquin
Sanders, Nathan J.
Suárez, Andrew V.
Touyama, Yoshifumi
Ward, Darren
Ward, Philip S.
Worner, Sue P.
Date: 2011
Abstract: Because invasive species threaten the integrity of natural ecosystems, a major goal in ecology is to develop predictive models to determine which species may become widespread and where they may invade. Indeed, considerable progress has been made in understanding the factors that influence the local pattern of spread for specific invaders and the factors that are correlated with the number of introduced species that have become established in a given region. However, few studies have examined the relative importance of multiple drivers of invasion success for widespread species at global scales. Here, we use a dataset of >5,000 presence/absence records to examine the interplay between climatic suitability, biotic resistance by native taxa, human-aided dispersal, and human modification of habitats, in shaping the distribution of one of the world’s most notorious invasive species, the Argentine ant (Linepithema humile). Climatic suitability and the extent of human modification of habitats are primarily responsible for the distribution of this global invader. However, we also found some evidence for biotic resistance by native communities. Somewhat surprisingly, and despite the often cited importance of propagule pressure as a crucial driver of invasions, metrics of the magnitude of international traded commodities among countries were not related to global distribution patterns. Together, our analyses on the global-scale distribution of this invasive species provide strong evidence for the interplay of biotic and abiotic determinants of spread and also highlight the challenges of limiting the spread and subsequent impact of highly invasive species
We acknowledge financial support from the Centre of Excellence for Invasion Biology (N.R.-P. and D.M.R.), from the Catalan Agency for Management of University and Research Grants (Generalitat de Catalunya) through Beatriu de Pinós Postdoctoral Grants 2006 BP-A 10124 and 2008 BP-B 00042 (to N.R.-P.), from the Hans Sigrist Foundation (to D.M.R.), from the Spanish Ministry of Science and Innovation Grant CGL2007-64080-C02-02/BOS (to C.G. and N.R.-P.), from the Spanish Ministry of Science and Innovation and the European Regional Development Fund Grant CGL2007-64080-C02-01/BOS (to X.E.), from the Blue Skies Programme of the National Research Foundation (to C.H.), from the Danish National Research Foundation (to J.S.P.), from Department of Energy–Program for Ecosystem Research Grant DE-FG02-08ER64510 (to N. J.S.), from National Science Foundation Grant DEB 0716966 (to A.V.S.), and from the New Zealand Foundation for Research, Science, and Technology Grant C09X0507 (to D.W.)
Format: application/pdf
ISSN: 0027-8424 (versió paper)
1091-6490 (versió electrònica)
Document access: http://hdl.handle.net/10256/12488
Language: eng
Publisher: National Academy of Sciences
Collection: MEC/PN 2007-2010/CGL2007-64080-C02-02/BOS
MEC/PN 2008-2010/CGL2007-64080-C02-01/BOS
Reproducció digital del document publicat a: http://dx.doi.org/10.1073/pnas.1011723108
Articles publicats (D-CCAA)
Is part of: © Proceedings of the National Academy of Sciences of the United States of America, 2011, vol. 108, núm. 1, p. 220-225
Rights: Tots els drets reservats
Subject: Invasions biològiques
Biological invasions
Formiga argentina
Argentine ant
Animals invasors
Introduced organisms
Title: Relative roles of climatic suitability and anthropogenic influence in determining the pattern of spread in a global invader
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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