Diversity, abundance, environmental conditions and stable isotopes within new gastropod assemblages from three vent fields (Menez Gwen, Lucky Strike, Snake Pit) on the northern Mid-Atlantic Ridge

Three vent fields (Menez Gwen, Lucky Strike, Snake Pit) of the Mid-Atlantic Ridge have been studied during six cruises between 2012 and 2016 on three different research vessels including BICOSE 2014 (Cambon-Bonavita MA ; https://doi.org/10.17600/14000100) on the RV Pourquoi pas?, Momarsat 2012 (Cannat M, Sarradin PM; https://doi.org/10.17600/12040050) on the RV Thalassa, Biobaz 2013 (Lallier F ; https://doi.org/10.17600/13030030), Momarsat 2014 (Cannat M, Sarradin PM, https://doi.org/10.17600/14000300) and Momarsat 2015 (Cannat M, Sarradin PM ; https://doi.org/10.17600/15000200) on the R/V Pourquoi pas? and Momarsat 2016 (Cannat M, Sarradin PM ; https://doi.org/10.17600/16001200) on the RV L'Atalante. During these cruises, the ROV Victor6000 was used to characterize the environmental conditions and collect faunal samples in newly-discovered vent gastropod assemblages. Two distinct assemblages were identified: one dominated by Lepetodrilus atlanticus at the shallowest Menez Gwen vent field and the other by Peltospira smaragdina at the two other investigated fields, Lucky Strike and Snake Pit. The chemistry of 17 gastropod assemblages was characterized prior to faunal sampling using the in situ chemical analyser CHEMINI (Vuillemin et al. 2009) that measures total dissolved sulphide and iron concentrations. In addition, fluid samples within habitats were collected with the PEPITO water sampler (Sarradin et al., 2009). Following habitat characterization, twelve gastropod assemblages were collected using the suction sampler of the submersible from five hydrothermally-active sampling locations at the MG (MG3), LS (Y3, Cypress, Isabel) and SP (Les Ruches) vent fields. The fauna was sorted to the lowest taxonomic level and preserved either in ethanol 96%, formalin 4% or frozen at -80°C for subsequent analyses. Stable isotope ratios of C and N from four key gastropod species (Divia briandi, Lepetodrilus atlanticus, Peltospira smaragdina, Protolira valvatoides) were analysed through continuous flow - elemental analysis - isotope ratio mass spectrometry (CF-EA-IRMS) either at  the Laboratoire d’analyse en écologie aquatique et en sédimentologie of Université du Québec à Trois-Rivières (CA) or the LIttoral ENvironnement et Sociétés stable isotope facility at University of La Rochelle (FR).


Physical oceanography, Biological oceanography, Chemical oceanography


Species abundance, sulphide concentrations, iron concentrations, oxygen concentrations, methane concentrations, magnesium concentrations, manganese concentrations, pH, temperature, hydrothermal vent, Menez Gwen, Lucky Strike, Snake Pit, stable isotopes, d13C, d15N


23.367667N, 23.367667S, -44.949833E, -44.949833W

37.841167N, 37.841167S, -31.556167E, -31.556167W

37.291833N, 37.291833S, -32.277667E, -32.277667W


The Chemini chemical analyzer : measures total dissolved sulfide and iron concentrations (see Vuillemin et al. 2009)

Fluid samples within the habitat were collected using the PEPITO water sampler (see Sarradin et al., 2009).

Thermistor chains measured the long-term temporal variability of temperature. Each chain was composed of six thermochron i-buttons© temperature probes enclosed in titanium cases.


Environmental data terms description
Environmental data
3 KoCSVQuality controlled data
Isotope data terms description
Isotope data
15 KoCSVQuality controlled data
Species data terms description
Species data
2 KoCSVQuality controlled data
Temperature data terms description
8 KoXLS, XLSXQuality controlled data
Temperature data
624 KoCSVQuality controlled data
How to cite
Sarrazin Jozee, Matabos Marjolaine, Cathalot Cecile, Laes Agathe, Marticorena Julien, Michel Loic, Pernet Marie Eve-Julie (2022). Diversity, abundance, environmental conditions and stable isotopes within new gastropod assemblages from three vent fields (Menez Gwen, Lucky Strike, Snake Pit) on the northern Mid-Atlantic Ridge. SEANOE. https://doi.org/10.17882/88555
In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication :
Sarrazin J., Cathalot C., Laes A., Marticorena J., Michel L. N., Matabos M. (2022). Integrated study of new faunal assemblages dominated by gastropods at three vent fields along the Mid-Atlantic Ridge: diversity, structure, composition and trophic interactions. In revision in Frontiers in Marine Science..

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