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Master Thesis

Rôle des pockmarks dans l'activité de bioconstruction de Haploops nirae

Abstract : Recent studies have revealed an original association between a specific area containing a high concentration of a sedimentary structure called pockmarks and a dense stand of amphipod crustaceans named Haploops nirae in the Bay of Concarneau, South Brittany. This study had two mains objectives: the first one was to consider the evolution of this area by means of bathymetric surveys, sonar imagery and sediment sounder. The second was to establish a links between the settlements of Haploops nirae and these pockmarks focusing on the differences existing between the sedimentary fraction of the tubes and the associated environment's one. The evolution of this area is not homogeneous but the overall system seems stable. Some areas have specific sedimentary migration which can influence pockmarks' activities. The study zone has great expulsion of fluids potential that could lead to the formation of new structures or could maintain the activity of existing ones. A formal link has not been established yet between pockmarks activities and tube formation from Haploops nirae. However the hypothesis of a causal relationship has not been rejected.
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Master Thesis
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Submitted on : Wednesday, July 9, 2014 - 9:15:47 AM
Last modification on : Tuesday, June 23, 2020 - 3:40:14 AM
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  • HAL Id : dumas-01019920, version 1



Marine Reynaud. Rôle des pockmarks dans l'activité de bioconstruction de Haploops nirae. Océanographie. 2014. ⟨dumas-01019920⟩



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