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Aquatic Biology

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AB 29:33-43 (2020)  -  DOI:

Trophic niche partitioning in marine wood-borers revealed by stable isotope analysis

François Charles1,*, Pascal Riera2, Pierre-Guy Sauriau3, François Lantoine1, Benoît Lebreton3, Hélène Agogué3, Stéphane Hourdez1

1Sorbonne Université, CNRS, Laboratoire d’Ecogéochimie des Environnements Benthiques, UMR 8222 LECOB, Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
2Sorbonne Université, CNRS, Adaptation et diversité du milieu marin, UMR7144 AD2M, Station Biologique de Roscoff, 29680 Roscoff, France
3Université de La Rochelle, CNRS, Littoral Environnement et Sociétés, UMR 7266 LIENSs, 2 rue Olympe de Gouges, 17000 La Rochelle, France
*Corresponding author:

ABSTRACT: Marine wood-borers often live in sympatry, sharing deadwood scattered at sea, both as food and habitat. In this study, carbon and nitrogen isotope compositions were determined to test the hypothesis that the trophic niches of Chelura terebrans, Limnoria quadripunctata, and Nototeredo norvagica obtained from softwood boards maintained in running, unfiltered seawater are different. Comparison of isotope compositions supports niche partitioning, with N. norvagica foraging primarily on wood, and crustaceans foraging on decaying wood. Needs and acquisition routes for nitrogen determine the trophic behavior of the species. Results presented here are valuable for assessing the impact of wood-boring species on each other, but also for evaluating the effect of the separation of carbon and nitrogen sources on the diversity of the interactions between co-existing species belonging to the same trophic guild.

KEY WORDS: Co-occurring marine wood-eaters · Trophic ecology · Stable isotopes · In situ experiment · Mediterranean Sea

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Cite this article as: Charles F, Riera P, Sauriau PG, Lantoine F, Lebreton B, Agogué H, Hourdez S (2020) Trophic niche partitioning in marine wood-borers revealed by stable isotope analysis. Aquat Biol 29:33-43.

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