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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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| Lebrun, Jeremie D.; Uher, Emmanuelle; Tusseau-vuillemin, Marie-helene; Gourlay-france, Catherine. |
| Biomonitoring, assumed to be an integrative measurement of the chemical exposure of aquatic organisms, is not straightforward for essential metals because they can be actively regulated by animals. Although increasing bioaccumulation with exposure levels is a crucial endpoint for the development of biomonitors, it is rarely verified in real environments, where the metal concentrations are rather low and vary little. This study was designed at the scale of a river basin to assess the ability of Gammarus pulex indigenous populations to accumulate Cu, Zn and Mn in realistic exposure conditions. During two annual campaigns, water and gammarids were collected at various sites contrasted in terms of physicochemistry and contamination. The results show... |
| Tipo: Text |
Palavras-chave: Biomonitor; Metal bioavailability; Gammarus pulex; Copper; Zinc; Manganese. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00180/29154/28656.pdf |
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