GERMANDE, Ophelie; GUNKEL-GRILLON, Peggy; DOMINIQUE, Yannick; FEURTET-MAZEL, Agnes; BIERQUE, Emilie; DASSIE, Emilie; DAFFE, Guillemine; PIERRON, Fabien; BAUDRIMONT, Isabelle; BAUDRIMONT, Magalie

doi:10.1016/j.jhazmat.2022.129285

Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]

GUNKEL-GRILLON, Peggy

DOMINIQUE, Yannick

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Article de revue

Ce document a été publié dans

Journal of Hazardous Materials. 2022-08-15, vol. 436

Résumé en anglais

New Caledonia is particularly affected by nickel open pit mining activities because of the presence of ultramafic soils rich in metals. The particles dispersed by atmospheric transport and soil erosion during the excavation of nickel end up by deposition or leaching in rivers where they may be bioaccumulated by organisms living downstream the mines. Despite alarming freshwater metals concentrations, no study investigated the level of their bioaccumulation in eels, and if high bioaccumulation levels occur, the potential consequences on their health. The aim of this study was to determine how eels Anguilla marmorata are impacted in situ by metals issued from mining activity by measuring: morphometric parameters; metal concentrations in tissues and organs and transcription levels of target genes encoding proteins involved in several metabolic key functions. Among organs, liver was found to be the most affected by mining with average nickel concentrations of 5.14 mg/kg versus 1.63 mg/kg for eels away from mines leading to dysregulation of numerous genes involved in oxidative stress, DNA repair, apoptosis, reproduction and both lipid and mitochondrial metabolisms. This study should allow us to define in an integrated way if metals released by mining activities influence metals bioaccumulation in eels and induce biological effects.< Réduire

Mots clés en anglais

Bioaccumulation

Eels

Gene transcription

Metals

New Caledonia

URI

https://oskar-bordeaux.fr/handle/20.500.12278/170341

DOI

http://dx.doi.org/10.1016/j.jhazmat.2022.129285

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Impact of nickel mining in New Caledonia on marbled eels Anguilla marmorata

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Résumé en anglais

Mots clés en anglais

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DOI

Unités de recherche