Community structure and temperature dynamics within a mussel assemblage on the Southern East Pacific Rise

Type Article
Date 2006-11
Language English
Author(s) Sarrazin JozeeORCID1, Walter Cecile1, Sarradin Pierre-MarieORCID1, Brind'Amour Anik1, Desbruyeres Daniel1, Briand Patrick1, Fabri Marie-ClaireORCID1, Van Gaever S2, Vanreusel A2, Bachraty Charleyne1, Thiebaut E3
Affiliation(s) 1 : IFREMER, Ctr Brest, LEP, DEEP, F-29280 Plouzane, France.
2 : Univ Ghent, Marine Biol Sect, B-9000 Ghent, Belgium.
3 : Univ Paris 06, CNRS, UMR 7144, Stn Biol Roscoff, F-29682 Roscoff, Franc
Source CBM - Cahiers de Biologie Marine (0007-9723) (Station Biologique de Roscoff), 2006-11 , Vol. 47 , N. 4 , P. 483-490
WOS© Times Cited 17
Keyword(s) East Pacific Rise, Temperature dynamics, Biomass, Diversity, Bathymodiolus thermophilus, Mussel assemblage, Hydrothermal vents
Abstract The composition, biomass and diversity of the fauna in a Bathymodiolus thermophilus mussel assemblage colonizing diffuse flow areas on the SEPR is described and compared with biological characteristics of other hydrothermal assemblages. The spatio-temporal dynamics of temperatures over fine scales within the mussel habitat are characterized using newly-developed statistical approaches. Temperature data obtained from two adjacent habitats (a cirriped assemblage and a bare substratum) are compared. The results of the temperature data show that the mean temperature and the temperature variations were significantly higher in the mussel assemblage (mean temperature: 4.12 +/- 1.85 degrees C) in comparison with 2.40 +/- 0.14 degrees C in the cirriped assemblage and 2.20 +/- 0.23 degrees C on the bare substratum. Discrete temperature measurements showed that temperature data varied both at a broad and fine scales in the mussel assemblage. Finally, analysis of the temperature periodic variability in the mussel assemblage during a 4-day period showed significant periodic modulations near T = 24h. Although not significant, a second trend is also observed around T = 12h. This work represents a step forward to the understanding of species distribution patterns at vents.
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Sarrazin Jozee, Walter Cecile, Sarradin Pierre-Marie, Brind'Amour Anik, Desbruyeres Daniel, Briand Patrick, Fabri Marie-Claire, Van Gaever S, Vanreusel A, Bachraty Charleyne, Thiebaut E (2006). Community structure and temperature dynamics within a mussel assemblage on the Southern East Pacific Rise. CBM - Cahiers de Biologie Marine, 47(4), 483-490. Open Access version :