Journal cover Journal topic
Biogeosciences An interactive open-access journal of the European Geosciences Union
Biogeosciences, 14, 2955-2977, 2017
https://doi.org/10.5194/bg-14-2955-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
20 Jun 2017
Biological and environmental rhythms in (dark) deep-sea hydrothermal ecosystems
Daphne Cuvelier1,a, Pierre Legendre2, Agathe Laës-Huon3, Pierre-Marie Sarradin1, and Jozée Sarrazin1 1Ifremer, Centre de Bretagne, REM/EEP, Laboratoire Environnement Profond, Plouzané, 29280, France
2Département de Sciences Biologiques, Université de Montréal, P.O. Box 6128, Succursale Centre-ville, Montréal, H3C 3J7, Québec, Canada
3Ifremer, Centre de Bretagne, REM/RDT, Laboratoire Détection, Capteurs et Mesures, Plouzané, 29280, France
acurrent address: Mare – Marine and Environmental Sciences Centre, Department of Oceanography and Fisheries, Rua Professor Frederico Machado 4, Horta, 9901-862, Portugal
Abstract. During 2011, two deep-sea observatories focusing on hydrothermal vent ecology were up and running in the Atlantic (Eiffel Tower, Lucky Strike vent field) and the Northeast Pacific Ocean (NEP) (Grotto, Main Endeavour Field). Both ecological modules recorded imagery and environmental variables jointly for a time span of 23 days (7–30 October 2011) and environmental variables for up to 9 months (October 2011–June 2012). Community dynamics were assessed based on imagery analysis and rhythms in temporal variation for both fauna and environment were revealed. Tidal rhythms were found to be at play in the two settings and were most visible in temperature and tubeworm appearances (at NEP). A  ∼  6 h lag in tidal rhythm occurrence was observed between Pacific and Atlantic hydrothermal vents, which corresponds to the geographical distance and time delay between the two sites.

Citation: Cuvelier, D., Legendre, P., Laës-Huon, A., Sarradin, P.-M., and Sarrazin, J.: Biological and environmental rhythms in (dark) deep-sea hydrothermal ecosystems, Biogeosciences, 14, 2955-2977, https://doi.org/10.5194/bg-14-2955-2017, 2017.
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