Skip to Main content Skip to Navigation
Journal articles

'Rare biosphere' bacteria as key phenanthrene degraders in coastal seawaters

Abstract : By coupling DNA-SIP and pyrosequencing approaches, we identified Cycloclasticus sp. as a keystone degrader of polycyclic aromatic hydrocarbons (PAH) despite being a member of the 'rare biosphere' in NW Mediterranean seawaters. We discovered novel PAH-degrading bacteria (Oceanibaculum sp., Sneathiella sp.) and we identified other groups already known to possess this function (Alteromonas sp., Paracoccus sp.). Together with Cycloclasticus sp., these groups contributed to potential in situ phenanthrene degradation at a rate >0.5 mg l−1 day−1, sufficient to account for a considerable part of PAH degradation. Further, we characterized the PAH-tolerant bacterial communities, which were much more diverse in the polluted site by comparison to unpolluted marine references. PAH-tolerant bacteria were also members of the rare biosphere, such as Glaciecola sp. Collectively, these data show the complex interactions between PAH-degraders and PAH-tolerant bacteria and provide new insights for the understanding of the functional ecology of marine bacteria in polluted waters.
Document type :
Journal articles
Complete list of metadata
Contributor : Thierry Pin Connect in order to contact the contributor
Submitted on : Monday, September 15, 2014 - 7:58:55 PM
Last modification on : Sunday, February 13, 2022 - 7:44:01 AM


  • HAL Id : hal-01064246, version 1


Caroline Sauret, Tatiana Séverin, Gilles Vétoin, C. Guigue, M. Goutx, et al.. 'Rare biosphere' bacteria as key phenanthrene degraders in coastal seawaters. Environmental Pollution, Elsevier, 2014, 194, pp.246-253. ⟨hal-01064246⟩



Record views