Oligotrophy as a major driver of mercury bioaccumulation in medium-to high-trophic level consumers: A marine ecosystem-comparative study.
| Title: | Oligotrophy as a major driver of mercury bioaccumulation in medium-to high-trophic level consumers: A marine ecosystem-comparative study. |
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| Authors: | Chouvelon T; IFREMER, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques, Rue de l'Ile d'Yeu, BP 21105, 44311 Nantes Cedex 03, France. Electronic address: tiphaine.chouvelon@ifremer.fr.; Cresson P; IFREMER, Unité Littoral, Laboratoire Environnement Ressources Provence Azur Corse, Zone portuaire de Brégaillon, CS 20330, 83507 La Seyne sur Mer Cedex, France; IFREMER, Unité Halieutique de Manche-Mer du Nord, Laboratoire Ressources Halieutiques de Boulogne, 150 quai Gambetta, 62200 Boulogne sur Mer, France.; Bouchoucha M; IFREMER, Unité Littoral, Laboratoire Environnement Ressources Provence Azur Corse, Zone portuaire de Brégaillon, CS 20330, 83507 La Seyne sur Mer Cedex, France.; Brach-Papa C; IFREMER, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques, Rue de l'Ile d'Yeu, BP 21105, 44311 Nantes Cedex 03, France; IFREMER, Unité Littoral, Laboratoire Environnement Ressources Provence Azur Corse, Zone portuaire de Brégaillon, CS 20330, 83507 La Seyne sur Mer Cedex, France.; Bustamante P; Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, 17042 La Rochelle Cedex 01, France.; Crochet S; IFREMER, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques, Rue de l'Ile d'Yeu, BP 21105, 44311 Nantes Cedex 03, France.; Marco-Miralles F; IFREMER, Unité Littoral, Laboratoire Environnement Ressources Provence Azur Corse, Zone portuaire de Brégaillon, CS 20330, 83507 La Seyne sur Mer Cedex, France.; Thomas B; IFREMER, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques, Rue de l'Ile d'Yeu, BP 21105, 44311 Nantes Cedex 03, France.; Knoery J; IFREMER, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques, Rue de l'Ile d'Yeu, BP 21105, 44311 Nantes Cedex 03, France. |
| Source: | Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2018 Feb; Vol. 233, pp. 844-854. Date of Electronic Publication: 2017 Nov 14. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Elsevier Applied Science Publishers Country of Publication: England NLM ID: 8804476 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-6424 (Electronic) Linking ISSN: 02697491 NLM ISO Abbreviation: Environ Pollut Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Barking, Essex, England : Elsevier Applied Science Publishers, c1987- |
| MeSH Terms: | Ecosystem* ; Environmental Monitoring* ; Food Chain*; Mercury/*metabolism ; Water Pollutants, Chemical/*metabolism; Aquatic Organisms/metabolism ; Mercury/analysis ; Nitrogen Isotopes/analysis ; Water Pollutants, Chemical/analysis ; Animals ; Atlantic Ocean ; Fishes ; Mediterranean Sea ; Methylmercury Compounds ; North Sea |
| Abstract: | Mercury (Hg) is a global contaminant of environmental concern. Numerous factors influencing its bioaccumulation in marine organisms have already been described at both individual and species levels (e.g., size or age, habitat, trophic level). However, few studies have compared the trophic characteristics of ecosystems to explain underlying mechanisms of differences in Hg bioaccumulation and biomagnification among food webs and systems. The present study aimed at investigating the potential primary role of the trophic status of systems on Hg bioaccumulation and biomagnification in temperate marine food webs, as shown by their medium-to high-trophic level consumers. It used data from samples collected at the shelf-edge (i.e. offshore organisms) in two contrasted ecosystems: the Bay of Biscay in the North-East Atlantic Ocean and the Gulf of Lion in the North-West Mediterranean Sea. Seven species including crustaceans, sharks and teleost fish, previously analysed for their total mercury (T-Hg) concentrations and their stable carbon and nitrogen isotope compositions, were considered for a meta-analysis. In addition, methylated mercury forms (or methyl-mercury, Me-Hg) were analysed. Mediterranean organisms presented systematically lower sizes than Atlantic ones, and lower δ13C and δ15N values, the latter values especially highlighting the more oligotrophic character of Mediterranean waters. Mediterranean individuals also showed significantly higher T-Hg and Me-Hg concentrations. Conversely, Me-Hg/T-Hg ratios were higher than 85% for all species, and quite similar between systems. Finally, the biomagnification power of Hg was different between systems when considering T-Hg, but not when considering Me-Hg, and was not different between the Hg forms within a given system. Overall, the different parameters showed the crucial role of the low primary productivity and its effects rippling through the compared ecosystems in the higher Hg bioaccumulation seen in organisms from oligotrophic Mediterranean waters.; (Copyright © 2017 Elsevier Ltd. All rights reserved.) |
| Contributed Indexing: | Keywords: Bioaccumulation; Biomagnifying metal; Ecosystem productivity; Temperate systems; Trophic status |
| Substance Nomenclature: | 0 (Methylmercury Compounds); 0 (Nitrogen Isotopes); 0 (Water Pollutants, Chemical); C60TQU15XY (dimethyl mercury); FXS1BY2PGL (Mercury) |
| Entry Date(s): | Date Created: 20171118 Date Completed: 20180411 Latest Revision: 20260127 |
| Update Code: | 20260130 |
| DOI: | 10.1016/j.envpol.2017.11.015 |
| PMID: | 29149758 |
| Database: | MEDLINE |
Journal Article