Mercury isotopes of key tissues document mercury metabolic processes in seabirds
International audience Seabirds accumulate significant amounts of mercury (Hg) due to their long-life span together with their medium to high trophic position in marine food webs. Hg speciation and Hg isotopic analyses of total Hg in different tissues (pectoral muscles, liver, brain, kidneys, blood...
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Online Access: | https://hal.science/hal-02910894 https://hal.science/hal-02910894/document https://hal.science/hal-02910894/file/Renedo%20et%20al%202021%20CHEMO.pdf https://doi.org/10.1016/j.chemosphere.2020.127777 |
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ftunivpau:oai:HAL:hal-02910894v1 2024-09-15T17:47:35+00:00 Mercury isotopes of key tissues document mercury metabolic processes in seabirds Renedo, Marina Pedrero, Zoyne Amouroux, David Cherel, Yves Bustamante, Paco LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) 2021-01 https://hal.science/hal-02910894 https://hal.science/hal-02910894/document https://hal.science/hal-02910894/file/Renedo%20et%20al%202021%20CHEMO.pdf https://doi.org/10.1016/j.chemosphere.2020.127777 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemosphere.2020.127777 hal-02910894 https://hal.science/hal-02910894 https://hal.science/hal-02910894/document https://hal.science/hal-02910894/file/Renedo%20et%20al%202021%20CHEMO.pdf doi:10.1016/j.chemosphere.2020.127777 info:eu-repo/semantics/OpenAccess ISSN: 0045-6535 EISSN: 1879-1298 Chemosphere https://hal.science/hal-02910894 Chemosphere, 2021, 263, pp.127777. ⟨10.1016/j.chemosphere.2020.127777⟩ methylmercury metabolism detoxification demethylation moult [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftunivpau https://doi.org/10.1016/j.chemosphere.2020.127777 2024-07-15T14:02:06Z International audience Seabirds accumulate significant amounts of mercury (Hg) due to their long-life span together with their medium to high trophic position in marine food webs. Hg speciation and Hg isotopic analyses of total Hg in different tissues (pectoral muscles, liver, brain, kidneys, blood and feathers) were assessed to investigate their detoxification mechanisms. Three species with contrasted ecological characteristics were studied: the Antarctic prion (zooplankton feeder), the white-chinned petrel (pelagic generalist consumer) and the southern giant petrel (scavenger on seabirds and marine mammals). The difference of mass-dependent fractionation (MDF, δ202Hg) values between livers and muscles (up to 0.94 ‰) in all three seabirds strongly suggests hepatic methylmercury (MeHg) demethylation and redistribution of the isotopically heavier fraction of MeHg towards the muscles. Similarly, higher δ202Hg values in feathers (up to 1.88 ‰) relative to muscles and higher proportion of MeHg in feathers (94-97%) than muscles (30-70%) likely indicate potential MeHg demethylation in muscle and preferential excretion of MeHg (isotopically heavier) in the growing feathers during moult. The extents of these key detoxification processes were strongly dependent on the species-specific detoxification strategies and levels of dietary MeHg exposure. We also found higher mass-independent fractionation (MIF, ∆199Hg) values in feathers relative to internal tissues, possibly due to different integration times of Hg exposure between permanently active organs and inert tissues as feathers. Hg isotope variations reported in this study show evidence of detoxification processes in seabirds and propose a powerful approach for deep investigation of the Hg metabolic processes in seabirds. Article in Journal/Newspaper Antarc* Antarctic Antarctic prion Giant Petrel HAL e2s UPPA (Université de Pau et des Pays de l'Adour) Chemosphere 263 127777 |
institution |
Open Polar |
collection |
HAL e2s UPPA (Université de Pau et des Pays de l'Adour) |
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ftunivpau |
language |
English |
topic |
methylmercury metabolism detoxification demethylation moult [SDE]Environmental Sciences |
spellingShingle |
methylmercury metabolism detoxification demethylation moult [SDE]Environmental Sciences Renedo, Marina Pedrero, Zoyne Amouroux, David Cherel, Yves Bustamante, Paco Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
topic_facet |
methylmercury metabolism detoxification demethylation moult [SDE]Environmental Sciences |
description |
International audience Seabirds accumulate significant amounts of mercury (Hg) due to their long-life span together with their medium to high trophic position in marine food webs. Hg speciation and Hg isotopic analyses of total Hg in different tissues (pectoral muscles, liver, brain, kidneys, blood and feathers) were assessed to investigate their detoxification mechanisms. Three species with contrasted ecological characteristics were studied: the Antarctic prion (zooplankton feeder), the white-chinned petrel (pelagic generalist consumer) and the southern giant petrel (scavenger on seabirds and marine mammals). The difference of mass-dependent fractionation (MDF, δ202Hg) values between livers and muscles (up to 0.94 ‰) in all three seabirds strongly suggests hepatic methylmercury (MeHg) demethylation and redistribution of the isotopically heavier fraction of MeHg towards the muscles. Similarly, higher δ202Hg values in feathers (up to 1.88 ‰) relative to muscles and higher proportion of MeHg in feathers (94-97%) than muscles (30-70%) likely indicate potential MeHg demethylation in muscle and preferential excretion of MeHg (isotopically heavier) in the growing feathers during moult. The extents of these key detoxification processes were strongly dependent on the species-specific detoxification strategies and levels of dietary MeHg exposure. We also found higher mass-independent fractionation (MIF, ∆199Hg) values in feathers relative to internal tissues, possibly due to different integration times of Hg exposure between permanently active organs and inert tissues as feathers. Hg isotope variations reported in this study show evidence of detoxification processes in seabirds and propose a powerful approach for deep investigation of the Hg metabolic processes in seabirds. |
author2 |
LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) |
format |
Article in Journal/Newspaper |
author |
Renedo, Marina Pedrero, Zoyne Amouroux, David Cherel, Yves Bustamante, Paco |
author_facet |
Renedo, Marina Pedrero, Zoyne Amouroux, David Cherel, Yves Bustamante, Paco |
author_sort |
Renedo, Marina |
title |
Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
title_short |
Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
title_full |
Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
title_fullStr |
Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
title_full_unstemmed |
Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
title_sort |
mercury isotopes of key tissues document mercury metabolic processes in seabirds |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-02910894 https://hal.science/hal-02910894/document https://hal.science/hal-02910894/file/Renedo%20et%20al%202021%20CHEMO.pdf https://doi.org/10.1016/j.chemosphere.2020.127777 |
genre |
Antarc* Antarctic Antarctic prion Giant Petrel |
genre_facet |
Antarc* Antarctic Antarctic prion Giant Petrel |
op_source |
ISSN: 0045-6535 EISSN: 1879-1298 Chemosphere https://hal.science/hal-02910894 Chemosphere, 2021, 263, pp.127777. ⟨10.1016/j.chemosphere.2020.127777⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemosphere.2020.127777 hal-02910894 https://hal.science/hal-02910894 https://hal.science/hal-02910894/document https://hal.science/hal-02910894/file/Renedo%20et%20al%202021%20CHEMO.pdf doi:10.1016/j.chemosphere.2020.127777 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.chemosphere.2020.127777 |
container_title |
Chemosphere |
container_volume |
263 |
container_start_page |
127777 |
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1810497000684126208 |