Community structure and temperature dynamics within a mussel assemblage on the southern East Pacific Rise
Sarrazin, J.; Walter, C.; Sarradin, P.-M.; Brind'Amour, A.; Desbruyères, D.; Briand, P.; Fabri, M.-C.; Van Gaever, S.; Vanreusel, A.; Bachraty, C.; Thiébaut, E. (2006). Community structure and temperature dynamics within a mussel assemblage on the southern East Pacific Rise. Cah. Biol. Mar. 47(4): 483-490. https://dx.doi.org/10.21411/CBM.A.3E05E5EC
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094
Also appears in:
Felbeck, H.; Bartlett, D.H. (Ed.) (2006). Third International Symposium on Hydrothermal Vent and Seep Biology, La Jolla, USA, September 12-16, 2005. Cahiers de Biologie Marine, 47(4). Station Biologique de Roscoff: Roscoff. 331-505 pp., more
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°C) in comparison with 2.40 +/- 0.14°C in the cirriped assemblage and 2.20 +/- 0.23°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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