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| Goineau, A.; Fontanier, C.; Jorissen, F.; Buscail, R.; Kerherve, P.; Cathalot, C.; Pruski, A. M.; Lantoine, F.; Bourgeois, S.; Metzger, E.; Legrand, E.; Rabouille, Christophe. |
| In the context of the French research project CHACCRA (Climate and Human-induced Alterations in Carbon Cycling at the River–seA connection), living (rose Bengal-stained) benthic foraminifera were investigated at two stations (24 and 67 m depth) in the Rhône prodelta (NW Mediterranean, Gulf of Lions). The aim of this study was to precise the response of benthic foraminiferal faunas to temporal changes of the Rhône River inputs (e.g. organic and terrigeneous material). Each site was sampled in April 2007, September 2007, May 2008 and December 2008, permitting to observe foraminiferal faunas of the 63–150 and >150 μm size fractions under a wide range of environmental conditions. Obvious variations in foraminiferal faunal composition were observed during... |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00140/25097/23323.pdf |
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| Charles, F.; Nozais, C.; Lantoine, F.; Rzeznik-orignac, J.; Labrune, C.; Coston-guarini, J.. |
| Using stable isotope analyses, the present study looked at the fractionation of carbon and nitrogen isotopes between bulk sediment organic matter, particulates from the water column, and benthic consumers from the Northwestern Mediterranean continental shelf. Results showed that sedimentary organic matter in the area under study mainly consisted of phytoplankton detritus. In contrast to their available food source, consumers varied widely both in delta C-13 and delta N-15. Meiofauna fed selectively freshly settled organic particles and channeled energy and matter toward the next upper trophic level. Subsurface primary consumers that feed on less readily digestible sediment organic fractions showed enrichments in rare heavier isotopes as high as those of... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00616/72858/72998.pdf |
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| Bourgeois, S.; Pruski, A. M.; Sun, M-y.; Buscail, R.; Lantoine, F.; Kerherve, P.; Vetion, G.; Riviere, B.; Charles, F.. |
| The Gulf of Lions is a river-dominated ocean margin that receives high loads of nutrients and particulate matter from the Rhone River but most particulate materials settle rapidly on the nearshore seafloor. One question is raised on the fate of these large quantities of organic carbon delivered by the river to the coastal marine environment. Surface sediments (0-0.5 cm) were collected in the Rhone prodelta and its adjacent shelf during a period of low river discharge (April 2007, 16 stations). The sources, distribution and lability of sedimentary organic matter were examined using bulk (organic carbon, total nitrogen, stable carbon isotope ratios, and grain size) and molecular-level (pigments, amino acids, fatty acids, and delta(13)C of individual fatty... |
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| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00303/41424/40617.pdf |
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