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| Urien, N.; Farfarana, A.; Uher, E.; Fechner, Lise; Chaumot, A.; Geffard, O.; Lebrun, J. D.. |
| Kinetic parameters (uptake from solution and elimination rate constants) of Cu, Ni and Pb bioaccumulation were determined from two Gammarus pulex and three Gammarus fossrum wild populations collected from reference sites throughout France in order to assess the inter-species and the natural inter-population variability of metal bioaccumulation kinetics in that sentinel organism. For that, each population was independently exposed for seven days to either 2.5 mu g L-1 Cu (39.3 nM), 40 mu g L-1 Ni (681 nM) or 10 mu g L-1 Pb (48.3 nM) in laboratory controlled conditions, and then placed in unexposed microcosms for a 7-day depuration period. In the same way, the possible influence of metal exposure history on subsequent metal bioaccumulation kinetics was... |
| Tipo: Text |
Palavras-chave: Amphipods; Trace metals; Life history; Kinetic parameters; Inter-population variability. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00417/52840/54270.pdf |
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| Berthe, Thierry; Fechner, Lise; Barraud, Olivier; Dagot, Christophe; Ploy, Marie-cécile; Michault, Manon; Cotelle, Flora; Gaschet, Margaux; Petit, Fabienne. |
| Ces travaux s’inscrivent dans la continuité de la phase VI du programme Piren-Seine (suivis de contamination et d’impacts écotoxicologiques sur l’axe Seine) et s’appuient sur des acquis d’études menées dans la partie aval du bassin de la Seine (GIPSA). Ils visent à évaluer les effets d’une exposition chronique et multiple aux contaminants chimiques et microbiologiques (gènes de résistances aux antibiotiques, intégrons cliniques) sur les communautés microbiennes de biofilms (premier niveau du réseau trophique), et de la couche superficielle des sédiments. L’étude du résistome des biofilms et des sédiments est utilisée pour évaluer l’adaptation des communautés bactériennes, comme un indicateur de vulnérabilité / ou de résilience du milieu, à la contamination... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00416/52795/53694.pdf |
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| Lebrun, Jeremie D.; Dufour, Marine; Uher, Emmanuelle; Fabure, Juliette; Mons, Raphael; Charlatchka, Rayna; Gourlay-france, Catherine; Fechner, Lise; Ferrari, Benoit Jd. |
| Dredging generates remobilisation of sediments contaminated by non-degradable compounds such as metals, to which aquatic organisms can be exposed. This study aims at assessing the environmental impact of sediments remobilised in the Rhine River (France) during the dredging of Marckolsheim dam by pumping/dilution in 2013 on metal speciation and organisms' exposure. The monitoring coupling chemical and biological tools was performed 2 years before dredging operation on 2 sampling sites, upstream and downstream from the discharge of pumping/dilution, to acquire data on the natural variability of labile (DGT as passive samplers), dissolved and particulate concentrations of Cd, Co, Cr, Cu, Ni, Mn, Pb and Zn in Rhine during full hydrological cycles. In parallel,... |
| Tipo: Text |
Palavras-chave: Active biomonitoring; Dreissena polymorpha; DGT; Metal bioavailability; Natural variability. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00413/52458/53244.pdf |
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