Influence of bioturbation by the polychaete Nereis diversicolor on the structure of bacterial communities in oil contaminated coastal sediments

Philippe Cuny (1) , Gilles Miralles (1) , Veronique Cornet (2) , Monique Acquaviva (1) , Georges Stora (1) , Vincent Grossi (3) , Franck Gilbert (1)

1 LMGEM - Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines
2 LOB - Laboratoire d'océanographie et de biogéochimie
3 PEPS - PaleoEnvironnements et PaleobioSphere

Patterns of change in the structure of bacterial communities monitored by ribosomal intergenic spacer analysis (RISA) in oil contaminated sediments inhabited or not by the marine polychaete Nereis diversicolor were studied during 45 days under laboratory conditions. Results supported by principal component analysis showed a marked response of the bacterial communities to the oil contamination and to the presence of N. diversicolor. Phylogenetic affiliation of specific RISA bands showed that, in the contaminated sediments, the presence of the marine polychaetes favoured the development of bacteria which may play an active role in natural bioremediation processes of oil polluted environments.

Mots clés: Bacterial communities; Bioturbation; Oil spills; Marine sediments; Bioremediation; Nereis diversicolor

Domaines: Géochimie; Océan, Atmosphère; Interfaces continentales, environnement; Milieux et Changements globaux; Microbiologie et Parasitologie; Ecologie, Environnement; Biodiversité

Philippe Cuny, Gilles Miralles, Veronique Cornet, Monique Acquaviva, Georges Stora, et al.. Influence of bioturbation by the polychaete Nereis diversicolor on the structure of bacterial communities in oil contaminated coastal sediments. Marine Pollution Bulletin, 2007, 54, pp.452-459. ⟨10.1016/j.marpolbul.2006.12.008⟩. ⟨hal-00171096⟩