Biodiversity and Conservation

, Volume 20, Issue 13, pp 3117–3131

Parasitism cost of living in a high quality habitat in the bog fritillary butterfly

  • Julie Choutt
  • Camille Turlure
  • Michel Baguette
  • Nicolas Schtickzelle
Original Paper

DOI: 10.1007/s10531-011-0151-8

Cite this article as:
Choutt, J., Turlure, C., Baguette, M. et al. Biodivers Conserv (2011) 20: 3117. doi:10.1007/s10531-011-0151-8

Abstract

Habitat quality and the impact of natural enemies might profoundly affect metapopulation dynamics and viability. However, their relative impact has usually been considered independently. Here we address the question of how caterpillar habitat quality and parasitism prevalence interact to shape habitat selection in the bog fritillary butterfly Boloria eunomia, parasitized at the caterpillar stage by a specialist wasp, Cotesiaeunomiae. We first classified habitat quality by relating caterpillar density to descriptors of different microhabitat types. Second, we investigated parasitism prevalence in those different microhabitats. Our results show that caterpillars and parasitoids mapped onto the same microhabitats, mainly zones with high abundance of the host plant. Accordingly, we suggest that both egg-laying females and parasitoids use the same cues for habitat selection. As a consequence, there should be a fitness cost for B. eunomia females to lay their eggs in places where parasitism prevalence is high. We indeed detected that B. eunomia females frequently laid eggs in habitat types that presented suboptimal microhabitat conditions for caterpillars. This suggests that the lower parasitism prevalence in these suboptimal habitat types counterbalances lower caterpillar survival, leading to an overall similar survival in optimal and suboptimal habitat types. Spreading eggs in different habitat types is thus expected to be a safe strategy to mitigate the adverse possible effects of environmental stochasticity and parasitism prevalence on offspring survival unequal among microhabitat types. From a conservation viewpoint, the preservation of habitat heterogeneity, including optimal but also suboptimal habitat areas, is crucial to ensure persistence of both the host and its parasitoid.

Keywords

Boloria eunomiaCotesia eunomiaeHabitat heterogeneityLarval parasitoidPeat bog

Abbreviations

AICc

Akaike’s information criterion corrected for small samples

CMR

Capture-Mark-Recapture

DCA

Detrended correspondence analysis

HOST

Abundance of the host plant Persicaria bistorta

TOPO

Microhabitat topography

VEGE1

First axis of a Detrended correspondence analysis summarizing plant species composition

VEGE2

Second axis of a Detrended correspondence analysis summarizing plant species composition

CLIM1

First axis of a Principal component analysis summarizing local microclimatic conditions

CLIM2

Second axis of a Principal component analysis summarizing local microclimatic conditions

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Julie Choutt
    • 1
  • Camille Turlure
    • 1
    • 2
  • Michel Baguette
    • 2
    • 3
  • Nicolas Schtickzelle
    • 1
  1. 1.Earth and Life Institute, Biodiversity Research CentreUniversité catholique de LouvainLouvain-la-NeuveBelgium
  2. 2.Département Ecologie et Gestion de la Biodiversité, CNRS UMR MNHN UPMC 7204 CERSPMuséum National d’Histoire Naturelle (MNHN)BrunoyFrance
  3. 3.CNRS USR 2926 Station d’écologie expérimentale du CNRS à MoulisMoulisFrance