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From introduction to equilibrium: Reconstructing the invasive pathways of the Argentine ant in a Mediterranean region

Determining the geographical range of invasive species is an important component of formulating effective management strategies. In the absence of detailed distributional data, species distribution models can provide estimates of an invasion range and increase our understanding of the ecological processes acting at various spatial scales. We used two complementary approaches to evaluate the influence of historical and environmental factors in shaping the distribution of the Argentine ant (Linepithema humile), a widespread, highly invasive species native to South America. Occurrence data were combined with environmental data at incremental spatial scales (extent and resolution) to predict the suitable range of the ant invasion using ecological niche models. In addition, we also used a spread model that simulated the jump dispersal of the species to identify the most plausible scenarios of arrival of L. humile in the NE Iberian Peninsula at local scales. Based on the results of both modelling practices, we suggest that L. humile might have reached its maximum geographic range at regional scales in the NE Iberian Peninsula. However, the species does not appear in equilibrium with the environment at small spatial scales, and further expansions are expected along coastal and inland localities of the Costa Brava. Long-distance jumps are ultimately responsible for the spread of the Argentine ant in the area. Overall, our study shows the utility of combining niche based models with spread models to understand the dynamics of species’ invasions

Financial support for this study came from Beatriu de Pino´s postdoctoral grant (2006 BP-A 10124) from Catalan Agency for Management of University and Research Grants (in support of NRP), the Ministry of Education and Science of the Spanish Government CGL2004-05240-C02-02/BOS (NRP and JMB).

© Global Change Biology, 2009, vol. 15, núm. 9, p. 2101-2115

Wiley

Author: Roura i Pascual, Núria
Bas Lay, Josep Maria
Thuiller, Wilfried
Hui, Cang
Krug, Rainer M.
Brotons, Lluís
Date: 2009
Abstract: Determining the geographical range of invasive species is an important component of formulating effective management strategies. In the absence of detailed distributional data, species distribution models can provide estimates of an invasion range and increase our understanding of the ecological processes acting at various spatial scales. We used two complementary approaches to evaluate the influence of historical and environmental factors in shaping the distribution of the Argentine ant (Linepithema humile), a widespread, highly invasive species native to South America. Occurrence data were combined with environmental data at incremental spatial scales (extent and resolution) to predict the suitable range of the ant invasion using ecological niche models. In addition, we also used a spread model that simulated the jump dispersal of the species to identify the most plausible scenarios of arrival of L. humile in the NE Iberian Peninsula at local scales. Based on the results of both modelling practices, we suggest that L. humile might have reached its maximum geographic range at regional scales in the NE Iberian Peninsula. However, the species does not appear in equilibrium with the environment at small spatial scales, and further expansions are expected along coastal and inland localities of the Costa Brava. Long-distance jumps are ultimately responsible for the spread of the Argentine ant in the area. Overall, our study shows the utility of combining niche based models with spread models to understand the dynamics of species’ invasions
Financial support for this study came from Beatriu de Pino´s postdoctoral grant (2006 BP-A 10124) from Catalan Agency for Management of University and Research Grants (in support of NRP), the Ministry of Education and Science of the Spanish Government CGL2004-05240-C02-02/BOS (NRP and JMB).
Format: application/pdf
ISSN: 1354-1013 (versió paper)
1365-2486 (versió electrònica)
Document access: http://hdl.handle.net/10256/12490
Language: eng
Publisher: Wiley
Collection: MEC/PN 2004-2007/CGL2004-05240-C02-02/BOS
Reproducció digital del document publicat a: http://dx.doi.org/10.1111/j.1365-2486.2009.01907.x
Articles publicats (D-CCAA)
Is part of: © Global Change Biology, 2009, vol. 15, núm. 9, p. 2101-2115
Rights: Tots els drets reservats
Subject: Invasions biològiques
Biological invasions
Animals invasors
Introduced organisms
Formiga argentina
Argentine ant
Title: From introduction to equilibrium: Reconstructing the invasive pathways of the Argentine ant in a Mediterranean region
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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