Biological Invasions

, Volume 12, Issue 4, pp 827–839 | Cite as

Does Argentine ant invasion affect prey availability for foliage-gleaning birds?

  • David Estany-TigerströmEmail author
  • Josep Maria Bas
  • Pere Pons
Original Paper


Food availability during the breeding season plays a critical role in reproductive success of insectivorous birds. Given that the invasive Argentine ant (Linepithema humile) is known to alter arthropod communities, we predicted that its invasion may affect the availability of food resources for coexisting foliage-gleaning birds. With this aim we studied, for 3 years, foliage arthropods occurring on cork oaks (Quercus suber) and tree heaths (Erica arborea) in invaded and non-invaded secondary forests of the northeastern Iberian Peninsula. Our results show that Argentine ants interact with arboreal foliage arthropods in a different manner than the native ants they displace do. The invasive ant impacted the arthropod community by reducing order diversity and ant species richness and by causing extirpation of most native ant species. Arthropod availability for foliage gleaners’ nestlings diminished in invaded cork oaks, mainly responding to the abundance and biomass depletion of caterpillars. Results suggest that the reproduction of canopy-foraging foliage-gleaning species that mostly rely on caterpillars to feed their young could be compromised by the Argentine ant invasion. Thus, the Argentine ant could be promoting bottom-up effects in the trophic web through its effects on the availability of arthropod preys for insectivorous birds.


Biological invasion Erica arborea Foliage arthropods Insectivorous birds Linepithema humile Quercus suber 



We thank Maria Llover and Eva Roma for inestimable lab and fieldwork assistance and Crisanto Gómez for facilities. The manuscript benefited from the comments of Miguel Clavero, Crisanto Gómez and two anonymous referees. This study was funded by the Spanish Ministry of Science and Innovation (CGL2004-05240-C02-02/BOS and CGL2007-64080-C02-02/BOS). D.E. held a CUR-DIUE grant from the Catalan Government and the European Social Fund.


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • David Estany-Tigerström
    • 1
    Email author
  • Josep Maria Bas
    • 1
  • Pere Pons
    • 1
  1. 1.Departament de Ciències AmbientalsUniversitat de GironaGironaSpain

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