Silver toxicity across salinity gradients: the role of dissolved silver chloride species (AgCl x ) in Atlantic killifish (Fundulus heteroclitus) and medaka (Oryzias latipes) early life-stage toxicity
| Autor: | Mélanie Auffan, Richard T. Di Giulio, Audrey J. Bone, Heileen Hsu-Kim, T. Ty Lindberg, Mark R. Wiesner, Cole W. Matson, M. C. Arnold |
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| Přispěvatelé: | Baylor University, Duke University [Durham], Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Department of Civil and Environmental Engineering [Durham] (CEE), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Salinity animal structures Silver Bioavailability Health Toxicology and Mutagenesis Oryzias media_common.quotation_subject Ionoregulation Sodium Chloride 010501 environmental sciences Management Monitoring Policy and Law Biology Fundulus heteroclitus Toxicology 01 natural sciences Fundulidae Toxicity Tests Animals Ecotoxicology 0105 earth and related environmental sciences media_common Ecology 010604 marine biology & hydrobiology General Medicine Euryhaline biology.organism_classification Na+ balance Fundulus Speciation Environmental chemistry Toxicity embryonic structures [SDE]Environmental Sciences [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Ecotoxicology Ecotoxicology, Springer Verlag, 2016, 25 (6), pp.1105-1118. ⟨10.1007/s10646-016-1665-3⟩ Ecotoxicology, 2016, 25 (6), pp.1105-1118. ⟨10.1007/s10646-016-1665-3⟩ |
| ISSN: | 0963-9292 1573-3017 |
| DOI: | 10.1007/s10646-016-1665-3⟩ |
| Popis: | International audience; The influence of salinity on Ag toxicity was investigated in Atlantic killifish (Fundulus heteroclitus) early life-stages. Embryo mortality was significantly reduced as salinity increased and Ag+ was converted to AgCl(solid). However, as salinity continued to rise (>5 ‰), toxicity increased to a level at least as high as observed for Ag+ in deionized water. Rather than correlating with Ag+, Fundulus embryo toxicity was better explained (R2 = 0.96) by total dissolved Ag (Ag+, AgCl2 −, AgCl3 2−, AgCl4 3−). Complementary experiments were conducted with medaka (Oryzias latipes) embryos to determine if this pattern was consistent among evolutionarily divergent euryhaline species. Contrary to Fundulus data, medaka toxicity data were best explained by Ag+ concentrations (R2 = 0.94), suggesting that differing ionoregulatory physiology may drive observed differences. Fundulus larvae were also tested, and toxicity did increase at higher salinities, but did not track predicted silver speciation. Alternatively, toxicity began to increase only at salinities above the isosmotic point, suggesting that shifts in osmoregulatory strategy at higher salinities might be an important factor. Na+ dysregulation was confirmed as the mechanism of toxicity in Ag-exposed Fundulus larvae at both low and high salinities. While Ag uptake was highest at low salinities for both Fundulus embryos and larvae, uptake was not predictive of toxicity. |
| Databáze: | OpenAIRE |
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