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Field and laboratory evaluation of DGT for predicting metal bioaccumulation and toxicity in the freshwater bivalve Hyridella australis exposed to contaminated sediments.
Amato, Elvio D; Marasinghe Wadige, Chamani P M; Taylor, Anne M; Maher, William A; Simpson, Stuart L; Jolley, Dianne F.
Afiliación
  • Amato ED; Systemic, Physiological and Ecotoxicological Research (SPHERE), Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; Centre for Environmental Contaminants Research, CSIRO Land and Water, Lucas Heights, NSW, 2234, Australia; School of Chemistry, University of W
  • Marasinghe Wadige CPM; Ecochemistry Laboratory, Institute for Applied Ecology, University of Canberra, Canberra, ACT, 2601, Australia.
  • Taylor AM; Ecochemistry Laboratory, Institute for Applied Ecology, University of Canberra, Canberra, ACT, 2601, Australia.
  • Maher WA; Ecochemistry Laboratory, Institute for Applied Ecology, University of Canberra, Canberra, ACT, 2601, Australia.
  • Simpson SL; Centre for Environmental Contaminants Research, CSIRO Land and Water, Lucas Heights, NSW, 2234, Australia.
  • Jolley DF; School of Chemistry, University of Wollongong, NSW, 2522, Australia.
Environ Pollut ; 243(Pt B): 862-871, 2018 Dec.
Article en En | MEDLINE | ID: mdl-30245448
The diffusive gradients in thin films (DGT) technique has shown to be a useful tool for predicting metal bioavailability and toxicity in sediments, however, links between DGT measurements and biological responses have often relied on laboratory-based exposures and further field evaluations are required. In this study, DGT probes were deployed in metal-contaminated (Cd, Pb, Zn) sediments to evaluate relationships between bioaccumulation by the freshwater bivalve Hyridella australis and DGT-metal fluxes under both laboratory and field conditions. The DGT-metal flux measured across the sediment/water interface (±1 cm) was useful for predicting significant cadmium and zinc bioaccumulation, irrespective of the type of sediment and exposure. A greater DGT-Zn flux measured in the field was consistent with significantly higher zinc bioaccumulation, highlighting the importance of performing metal bioavailability assessments in situ. In addition, DGT fluxes were useful for predicting the potential risk of sub-lethal toxicity (i.e., lipid peroxidation and lysosomal membrane damage). Due to its ability to account for multiple metal exposures, DGT better predicted bioaccumulation and toxicity than particulate metal concentrations in sediments. These results provide further evidence supporting the applicability of the DGT technique as a monitoring tool for sediment quality assessment.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Monitoreo del Ambiente / Bivalvos / Sedimentos Geológicos / Metales Tipo de estudio: Prognostic_studies / Risk_factors_studies Límite: Animals Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Monitoreo del Ambiente / Bivalvos / Sedimentos Geológicos / Metales Tipo de estudio: Prognostic_studies / Risk_factors_studies Límite: Animals Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido