Biodiversity and Conservation

, Volume 17, Issue 8, pp 1837–1852 | Cite as

Impact of anthropogenic disturbances on beetle communities of French Mediterranean coastal dunes

  • Vincent Comor
  • Jérôme Orgeas
  • Philippe Ponel
  • Christiane Rolando
  • Yannick R. Delettre
Original Paper

Abstract

In coastal dunes, influenced by anthropogenic activities such as tourism, it is important to determine the relative influence of environmental factors at different spatial scales to evaluate the sensitivity of local communities to disturbances. We analyzed beetle communities of 14 dunes of the French Mediterranean coast: four in the relatively preserved Camargue area, and ten in the Var department, where tourism is intensive. Beetle communities were studied three times in early spring using sand sampling. Species-environment relationships were evaluated at the regional, landscape and local scale using redundancy analysis (RDA) and variability partitioning. About 28 species were identified, of which 15 were sand-specialist species, which accounted for more than 93% of total abundance. The beetle communities of Camargue were significantly different from those of the Var department owing to the pullulation of a Tenebrionid species (Trachyscelis aphodioides Latr.) in the Var, except for one restored dune where the community was very similar to those of Camargue. Our results showed no longitudinal gradient between the two regions. Local factors (dune height, preservation and disturbance index) significantly explained most of the variation in the dominance of T. aphodioides, while some other local factors were important for other psammophilous species. This study also suggests that dune beetle communities are strongly affected on beaches intensively managed for tourism, but beetles are still abundant in much disturbed sites.

Keywords

Insect Coleoptera Tourism Trampling Urbanization Beach Pullulation 

Notes

Acknowledgements

We are greatly indebted to Philippe Vernon, CNRS, UMR 6553 “Ecobio” and to reviewers for their very fruitful comments and suggestions on the manuscript, and to Sandrine Baudry for improving the English of the first draft.

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Vincent Comor
    • 1
    • 2
  • Jérôme Orgeas
    • 1
  • Philippe Ponel
    • 1
  • Christiane Rolando
    • 1
  • Yannick R. Delettre
    • 3
  1. 1.IMEP, UMR-CNRS 6116, Bâtiment Villemin, Europole de l’ArboisAix-en-Provence cedex 04France
  2. 2.Resource Ecology Group, Wageningen UniversityWageningenThe Netherlands
  3. 3.IFR CAREN, UMR-CNRS 6553 « Ecobio »Rennes CedexFrance

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