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Article

Spatial Distributions of Surface Sedimentary Organics and Sediment Profile Image Characteristics in a High-Energy Temperate Marine RiOMar: The West Gironde Mud Patch

1
UMR EPOC, Université de Bordeaux, CNRS, UMR 5805, Station Marine d’Arcachon, 2 rue du Professeur Jolyet, 33120 Arcachon, France
2
UMR EPOC, Université de Bordeaux, CNRS, UMR 5805, Bâtiments B18/B18N, Allée Geoffroy Saint-Hilaire, CEDEX, 33615 Pessac, France
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Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro CEP 21941-902, Brazil
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IFREMER Brest—DYNECO/DHYSED, Centre de Bretagne, CS 10070, 29280 Plouzané, France
*
Author to whom correspondence should be addressed.
Deceased.
Academic Editor: Antoni Calafat
J. Mar. Sci. Eng. 2021, 9(3), 242; https://doi.org/10.3390/jmse9030242
Received: 14 December 2020 / Revised: 1 February 2021 / Accepted: 2 February 2021 / Published: 24 February 2021
(This article belongs to the Special Issue Benthic Biology and Biogeochemistry)
The spatial distributions of (1) surface sediment characteristics (D0.5, Sediment Surface Area (SSA), Particulate Organic Carbon (POC), Chlorophyll-a (Chl-a), Phaeophytin-a (Phaeo-a), Total and Enzymatically Hydrolyzable Amino Acids (THAA, EHAA), δ13C) and (2) sediment profile image (apparent Redox Potential Discontinuity (aRPD), numbers and depths of biological traces) characteristics were quantified based on the sampling of 32 stations located within the West Gironde Mud Patch (Bay of Biscay, NE Atlantic) in view of (1) assessing the spatial structuration of a temperate river-dominated ocean margin located in a high-energy area, (2) disentangling the impacts of hydrodynamics and bottom trawling on this structuration, and (3) comparing the West Gironde Mud Patch with the Rhône River Prodelta (located in a low-energy area). Results support the subdivision of the West Gironde Mud Patch in a proximal and a distal part and show (1) the existence of depth gradients in surface sedimentary organics characteristics and bioturbation within the distal part; (2) no evidence for a significant effect of bottom trawling, as opposed to Bottom Shear Stress, on the West Gironde Mud Patch spatial structuration; and (3) major discrepancies between spatial structuration in the West Gironde Mud Patch and the Rhône River Prodelta, which were attributed to differences in tidal regimes, sedimentation processes, and local hydrodynamics, which is in agreement with current river-dominated ocean margin typologies. View Full-Text
Keywords: RiOMar; surface sediment; spatial distribution; sedimentary organics; bioturbation RiOMar; surface sediment; spatial distribution; sedimentary organics; bioturbation
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MDPI and ACS Style

Lamarque, B.; Deflandre, B.; Galindo Dalto, A.; Schmidt, S.; Romero-Ramirez, A.; Garabetian, F.; Dubosq, N.; Diaz, M.; Grasso, F.; Sottolichio, A.; Bernard, G.; Gillet, H.; Cordier, M.-A.; Poirier, D.; Lebleu, P.; Derriennic, H.; Danilo, M.; Murilo Barboza Tenório, M.; Grémare, A. Spatial Distributions of Surface Sedimentary Organics and Sediment Profile Image Characteristics in a High-Energy Temperate Marine RiOMar: The West Gironde Mud Patch. J. Mar. Sci. Eng. 2021, 9, 242. https://doi.org/10.3390/jmse9030242

AMA Style

Lamarque B, Deflandre B, Galindo Dalto A, Schmidt S, Romero-Ramirez A, Garabetian F, Dubosq N, Diaz M, Grasso F, Sottolichio A, Bernard G, Gillet H, Cordier M-A, Poirier D, Lebleu P, Derriennic H, Danilo M, Murilo Barboza Tenório M, Grémare A. Spatial Distributions of Surface Sedimentary Organics and Sediment Profile Image Characteristics in a High-Energy Temperate Marine RiOMar: The West Gironde Mud Patch. Journal of Marine Science and Engineering. 2021; 9(3):242. https://doi.org/10.3390/jmse9030242

Chicago/Turabian Style

Lamarque, Bastien, Bruno Deflandre, Adriana Galindo Dalto, Sabine Schmidt, Alicia Romero-Ramirez, Frédéric Garabetian, Nicolas Dubosq, Mélanie Diaz, Florent Grasso, Aldo Sottolichio, Guillaume Bernard, Hervé Gillet, Marie-Ange Cordier, Dominique Poirier, Pascal Lebleu, Hervé Derriennic, Martin Danilo, Márcio Murilo Barboza Tenório, and Antoine Grémare. 2021. "Spatial Distributions of Surface Sedimentary Organics and Sediment Profile Image Characteristics in a High-Energy Temperate Marine RiOMar: The West Gironde Mud Patch" Journal of Marine Science and Engineering 9, no. 3: 242. https://doi.org/10.3390/jmse9030242

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