Biological and environmental rhythms in (dark) deep-sea hydrothermal ecosystems

Type Article
Date 2017-06
Language English
Author(s) Cuvelier Daphne1, 4, Legendre Pierre2, Laes-Huon AgatheORCID3, Sarradin Pierre-MarieORCID1, Sarrazin Jozee1
Affiliation(s) 1 : IFREMER, Ctr Bretagne, REM EEP, Lab Environm Profond, F-29280 Plouzane, France.
2 : Univ Montreal, Dept Sci Biol, POB 6128,Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada.
3 : IFREMER, Ctr Bretagne, REM RDT, Lab Detect Capteurs & Mesures, F-29280 Plouzane, France.
4 : Mare Marine & Environm Sci Ctr, Dept Oceanog & Fisheries, Rua Prof Freder Machado 4, P-9901862 Horta, Portugal.
Source Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2017-06 , Vol. 14 , N. 12 , P. 2955-2977
DOI 10.5194/bg-14-2955-2017
WOS© Times Cited 8
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.

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