Article (Scientific journals)
Mercury stable isotopes discriminate different populations of European seabass and trace potential Hg sources around Europe
Cransveld, Alice; Amouroux, David; Tessier, Emmanuel et al.
2017In Environmental Science and Technology, 51 (21), p. 12219-12228
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Keywords :
mercury; mercury isotopes; methylmercury; Dicentrarchus labrax
Abstract :
[en] Our study reports the first data on mercury (Hg) isotope composition in marine European fish, for seven distinct populations of the European seabass, Dicentrarchus labrax. The use of δ20230 Hg and Δ19931 Hg values in SIBER enabled us to estimate Hg isotopic niches, successfully discriminating several populations. Recursive-partitioning analyses demonstrated the relevance of Hg stable isotopes as discriminating tools. Hg isotopic values also provided insight on Hg contamination sources for biota in coastal environment. The overall narrow range of δ202 Hg around Europe was suggested to be related to a global atmospheric contamination while δ202 Hg at some sites was linked either to background ontamination, or with local contamination sources. Δ199 Hg was related to Hg levels of fish but we also suggest a relation with ecological conditions. Throughout this study, results from the Black Sea population stood out, displaying a Hg cycling similar to fresh water lakes. Our findings bring out the possibility to use Hg isotopes in order to discriminate distinct populations, to explore the Hg cycle on a large scale (Europe) and to distinguish sites contaminated by global versus local Hg source. The interest of using Hg sable isotopes to investigate the whole European Hg cycle is clearly highlighted.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Cransveld, Alice
Amouroux, David
Tessier, Emmanuel
Koutrakis, Emmanuil
Ozturk, Ayaka
Bettoso, Nicola
Mieiro, Claudia
Berail, Sylvain
Barre, Julien
Sturaro, Nicolas ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Schnitzler, Joseph ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Das, Krishna  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Language :
English
Title :
Mercury stable isotopes discriminate different populations of European seabass and trace potential Hg sources around Europe
Publication date :
2017
Journal title :
Environmental Science and Technology
ISSN :
0013-936X
eISSN :
1520-5851
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
51
Issue :
21
Pages :
12219-12228
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ULg FSR - Université de Liège. Fonds spéciaux pour la recherche [BE]
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