Data/hora: 07/06/2024 08:33:06

Provedor de dados: | 5
País: | France
Título: | Spatial Distributions of Surface Sedimentary Organics and Sediment Profile Image Characteristics in a High-Energy Temperate Marine RiOMar: The West Gironde Mud Patch
Autores: | Lamarque, Bastien; Deflandre, Bruno; Galindo Dalto, Adriana; Schmidt, Sabine; Romero-ramirez, Alicia; Garabetian, Frédéric; Dubosq, Nicolas; Diaz, Melanie; Grasso, Florent; Sottolichio, Aldo; Bernard, Guillaume; Gillet, Hervé; Cordier, Marie-ange; Poirier, Dominique; Lebleu, Pascal; Derriennic, Hervé; Danilo, Martin; Murilo Barboza Tenório, Márcio; Grémare, Antoine.
Data: | 2021-03
Ano: | 2021
Palavras-chave: | RiOMar; Surface sediment; Spatial distribution; Sedimentary organics; Bioturbation.
Resumo: | 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.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00681/79336/81848.pdf

DOI:10.3390/jmse9030242

https://archimer.ifremer.fr/doc/00681/79336/

Editor: | MDPI AG
Relação: | info:eu-repo/grantAgreement/EC/FP7/654410/EU//JERICO-NEXT
Formato: | application/pdf
Fonte: | Journal Of Marine Science And Engineering (2077-1312) (MDPI AG), 2021-03 , Vol. 9 , N. 3 , P. 242 (32p.)

Fonte:

info:eu-repo/semantics/openAccess

restricted use