Get access

The response of life-history traits to a new species in the community: a story of Drosophila parasitoids from the Rhône and Saône valleys

Authors

  • CHLOÉ VAYSSADE,

    1. INRA, UMR 1355 Institut Sophia Agrobiotech, Equipe ‘Biologie des Populations Introduites’, 06903 Sophia Antipolis, France
    2. Université de Nice Sophia Antipolis, UMR Institut Sophia Agrobiotech, Equipe ‘Biologie des Populations Introduites’, 06903 Sophia Antipolis, France
    3. CNRS, UMR 7254 Institut Sophia Agrobiotech, Equipe ‘Biologie des Populations Introduites’, 06903 Sophia Antipolis, France
    4. UMR CNRS 6553 Ecobio, UMS 3343 OSUR, Université de Rennes 1, 35042 Rennes Cedex, France
    Search for more papers by this author
    • These authors contributed equally to this work.

  • VÉRONIQUE MARTEL,

    1. Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055, rue du P.E.P.S., PO Box 10380, Stn Ste-Foy, Quebec, QC, Canada G1V 4C7
    Search for more papers by this author
    • These authors contributed equally to this work.

  • JOFFREY MOIROUX,

    1. UMR CNRS 6553 Ecobio, UMS 3343 OSUR, Université de Rennes 1, 35042 Rennes Cedex, France
    Search for more papers by this author
  • XAVIER FAUVERGUE,

    1. INRA, UMR 1355 Institut Sophia Agrobiotech, Equipe ‘Biologie des Populations Introduites’, 06903 Sophia Antipolis, France
    2. Université de Nice Sophia Antipolis, UMR Institut Sophia Agrobiotech, Equipe ‘Biologie des Populations Introduites’, 06903 Sophia Antipolis, France
    3. CNRS, UMR 7254 Institut Sophia Agrobiotech, Equipe ‘Biologie des Populations Introduites’, 06903 Sophia Antipolis, France
    Search for more papers by this author
  • JACQUES J. M. VAN ALPHEN,

    1. UMR CNRS 6553 Ecobio, UMS 3343 OSUR, Université de Rennes 1, 35042 Rennes Cedex, France
    Search for more papers by this author
    • These authors contributed equally to this work.

  • JOAN VAN BAAREN

    Corresponding author
    1. UMR CNRS 6553 Ecobio, UMS 3343 OSUR, Université de Rennes 1, 35042 Rennes Cedex, France
    Search for more papers by this author
    • These authors contributed equally to this work.


E-mail: joan.van-baaren@univ-rennes1.fr

Abstract

In the present study, we investigated the evolution of life-history traits in the main species of a community, after the arrival of a new competitor. Two parasitoid species, Leptopilina heterotoma and Asobara tabida, are present throughout the Rhône and Saône valleys, whereas a third species, Leptopilina boulardi, is slowly extending its distribution northwards. In the presence of L. boulardi, competing parasitoids experience a higher mortality and lower host availability. Resources should thus be re-allocated between traits according to these new factors. We compared life-history traits of populations of L. heterotoma and A. tabida in areas with and without L. boulardi. As predicted by both Price's balanced mortality hypothesis and the theory of life-history traits, we found that investment in reproduction is higher in southern populations for both native species, coupled with higher travelling abilities. However, only A. tabida paid their higher fecundity by a lower longevity. The absence of a clear trade-off between these traits in L. heterotoma may be explained by a lower metabolic rate in southern populations. These results highlight the importance of the community change over climate in the evolution of life-history traits in this parasitoid community. © 2012 The Linnean Society of London, Biological Journal of the Linnean Society, 2012, ••, ••–••.

Ancillary