About the Authors

Karine Olu

karine.olu@ifremer.fr

Affiliation Département Etude des Ecosystèmes Profonds (DEEP), IFREMER, BP70, 29280 Plouzané, France

Erik E. Cordes

Affiliation Biology Department, Temple University, Philadelphia, Pennsylvania, United States of America

Charles R. Fisher

Affiliation Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America

James M. Brooks

Affiliation TDI-Brooks International, College Station, Texas, United States of America

Myriam Sibuet

Affiliation Institut Océanographique, Paris, France

Daniel Desbruyères

Affiliation Département Etude des Ecosystèmes Profonds (DEEP), IFREMER, BP70, 29280 Plouzané, France

Competing Interests

Total oil company has partially funded the work in the Gulf of Guinea (collaboration Ifremer-Total: program “Biozaire”). The company TDI-Brooks International was responsible for the collections of the scientific seep samples from the Nigerian margin. The funding from these commercial sources does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: EEC CRF MS. Performed the experiments: KO EEC CRF. Analyzed the data: KO. Wrote the paper: KO. Contributed to writing the paper (corrections): EEC CRF. Supplied some of the W African collections analyzed and was the lead on the deep water Chemo project in the GoM, where a bunch of the original data for those analyses came from: JMB. Project leader for Congo and Gabon margins: MS. Leader of ChEss project “Atlantic Equatorial Belt communities”: DD.