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| Bernard, Guillaume; Duchene, Jean-claude; Romero-ramirez, Alicia; Lecroart, Pascal; Maire, Olivier; Ciutat, Aurelie; Deflandre, Bruno; Gremare, Antoine. |
| The effects of temperature and food addition on particle mixing in the deposit-feeding bivalve Abra alba were assessed using an experimental approach allowing for the tracking of individual fluorescent particle (luminophore) displacements. This allowed for the computations of vertical profiles of a set of parameters describing particle mixing. The frequency of luminophore displacements (jumps) was assessed through the measurement of both waiting times (i.e., the time lapses between two consecutive jumps of the same luminophore) and normalized numbers of jumps (i.e., the numbers of jumps detected in a given area divided by the number of luminophores in this area). Jump characteristics included the direction, duration and length of each jump. Particle... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00375/48615/49432.pdf |
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| Painting, Suzanne; Collingridge, Kate; Durand, Dominique; Grémare, Antoine; Bernard, Guillaume; Puillat Felix, Ingrid. |
| The objectives of JERICO-NEXT are to address the challenge of observing the complexity and high variability of coastal areas at Pan-European level, within the context of the EU Water Framework Directive and Marine Strategy Framework Directive, and operational marine services. The JERICO-NEXT project aims to extend the EU network of coastal observations developed in FP7-JERICO by adding new innovative infrastructures while integrating biogeochemical and biological observations. An important target of JERICO-NEXT is to provide the research community with continuous and more valuable coastal data coupling physical and biological information. The ultimate objectives are to maximise the value and impact of the JERICO research infrastructure (JERICO-RI) and... |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00382/49335/49720.pdf |
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| 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. |
| 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... |
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Palavras-chave: RiOMar; Surface sediment; Spatial distribution; Sedimentary organics; Bioturbation. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00681/79336/81848.pdf |
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| Bernard, Guillaume; Romero-ramirez, Alicia; Tauran, Adeline; Pantalos, Michael; Deflandre, Bruno; Grall, Jacques; Gremare, Antoine. |
| Maerl beds form complex biogenic benthic habitats, characterized by high productivity as well as diverse biological communities. Disturbances associated with extraction and/or fishing activities using mobile bottom-contacting gears such as clam-dredges induce the most severe and long-term effects on these fragile habitats. We here investigated the effects of dredge-fishing on maerl in the bay of Brest (France). We quantified maerl beds structure and vitality across a fine scale quantified dredging intensity gradient through the acquisition of in-situ images of beds cross-section using Sediment Profile Imaging system (SPI). Declines in the proxies of maerl vitality and habitat complexity were measured across the gradient, and were associated with... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00677/78861/81162.pdf |
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