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Live−dead comparison of benthic foraminiferal faunas from the Rhône prodelta (Gulf of Lions, NW Mediterranean): Development of a proxy for palaeoenvironmental reconstructions ArchiMer
Goineau, A.; Fontanier, Christophe; Mojtahid, M.; Fanget, Anne-sophie; Bassetti, M-a.; Berne, Serge; Jorissen, F..
Dead benthic foraminiferal faunas (> 150 μm) from the Rhône prodelta (Gulf of Lions, NW Mediterranean) were analysed at 41 stations (15–100 m water depth) sampled in June 2005 and September 2006, and compared to the living faunas investigated during previous studies at the same stations. The comparison between dead and living assemblages enhances the understanding of taphonomic processes that may modify the composition of the dead faunas in this area. We observed a loss of individuals from living to dead assemblages of species characterised by a fairly fragile test and therefore more prone to fragmentation or dissolution (e.g., Bolivina alata, Quinqueloculina tenuicollis). Allochthonous dead and/or live specimens may be transported to some parts of the...
Tipo: Text Palavras-chave: Benthic foraminifera; Rhone prodelta; Taphonomy; Thanatofacies; Palaeoceanography.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00273/38399/36725.pdf
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Temporal variability of live (stained) benthic foraminiferal faunas in a river-dominated shelf – Faunal response to rapid changes of the river influence (Rhône prodelta, NW Mediterranean) ArchiMer
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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