Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas
International audience Diet is an important route of mercury (Hg) uptake in marine organisms. Trophic transfer of Hg throughout the food webs may be influenced by various factors, including diet and Hg speciation. Bivalves such as oysters are widely used as bioindicators of trace element pollution s...
Published in: | Environmental Pollution |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-02561065 https://hal.archives-ouvertes.fr/hal-02561065/document https://hal.archives-ouvertes.fr/hal-02561065/file/Metian%20et%20al%202020%20ENPO.pdf https://doi.org/10.1016/j.envpol.2019.113503 |
id |
ftccsdartic:oai:HAL:hal-02561065v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-02561065v1 2023-05-15T15:58:18+02:00 Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas Metian, Marc Pouil, Simon Dupuy, Christine Teyssié, Jean-Louis Warnau, Michel Bustamante, Paco Environment Laboratories (IAEA) International Atomic Energy Agency Vienna (IAEA) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Marine Environment Laboratories Monaco (IAEA-MEL) 2020-02 https://hal.archives-ouvertes.fr/hal-02561065 https://hal.archives-ouvertes.fr/hal-02561065/document https://hal.archives-ouvertes.fr/hal-02561065/file/Metian%20et%20al%202020%20ENPO.pdf https://doi.org/10.1016/j.envpol.2019.113503 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envpol.2019.113503 hal-02561065 https://hal.archives-ouvertes.fr/hal-02561065 https://hal.archives-ouvertes.fr/hal-02561065/document https://hal.archives-ouvertes.fr/hal-02561065/file/Metian%20et%20al%202020%20ENPO.pdf doi:10.1016/j.envpol.2019.113503 info:eu-repo/semantics/OpenAccess ISSN: 0269-7491 EISSN: 1873-6424 Environmental Pollution https://hal.archives-ouvertes.fr/hal-02561065 Environmental Pollution, Elsevier, 2020, 257, pp.113503. ⟨10.1016/j.envpol.2019.113503⟩ Bivalve Bioaccumulation Food pathway Mercury Radiotracers [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1016/j.envpol.2019.113503 2021-11-07T01:10:45Z International audience Diet is an important route of mercury (Hg) uptake in marine organisms. Trophic transfer of Hg throughout the food webs may be influenced by various factors, including diet and Hg speciation. Bivalves such as oysters are widely used as bioindicators of trace element pollution such as Hg. Nevertheless, our current knowledge regarding their ability to accumulate Hg from their diet is mainly based on experiments performed using phytoplankton. In their natural environment, oysters feed on a variety of feeds including ciliates, detritus, in addition to phytoplankton. The present study aimed at examining the influence of diet composition on the trophic transfer of inorganic Hg (iHg) and methylmercury (MeHg) in the Pacific cupped oyster Crassostrea gigas. The pulse-chase feeding method was used with two radiolabeled feed items: a heterotrophic protist (Uronema marina) and phytoplankton with a diatom model, Thalassiosira pseudonana. Depuration of dietary Hg in the oysters was followed for 50 d. Kinetic parameters including Assimilation Efficiency (AE) and efflux rate constant (ke) were calculated. Our results shown that oysters fed on ciliates assimilated 96 ± 1% and 31 ± 2% of the ingested MeHg and iHg respectively while these elements were similarly assimilated in the oysters fed on phytoplankton (78 ± 3% and 86 ± 4% for MeHg and iHg, respectively). Mercury assimilation in oyster is thus diet dependent (significant differences in AE, p < 0.05), metal species-dependent and likely resulting from variations in Hg bioavailability in the two feed items tested and a gut passage time-dependent of the ingested matrix. Article in Journal/Newspaper Crassostrea gigas Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Environmental Pollution 257 113503 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Bivalve Bioaccumulation Food pathway Mercury Radiotracers [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
Bivalve Bioaccumulation Food pathway Mercury Radiotracers [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Metian, Marc Pouil, Simon Dupuy, Christine Teyssié, Jean-Louis Warnau, Michel Bustamante, Paco Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas |
topic_facet |
Bivalve Bioaccumulation Food pathway Mercury Radiotracers [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience Diet is an important route of mercury (Hg) uptake in marine organisms. Trophic transfer of Hg throughout the food webs may be influenced by various factors, including diet and Hg speciation. Bivalves such as oysters are widely used as bioindicators of trace element pollution such as Hg. Nevertheless, our current knowledge regarding their ability to accumulate Hg from their diet is mainly based on experiments performed using phytoplankton. In their natural environment, oysters feed on a variety of feeds including ciliates, detritus, in addition to phytoplankton. The present study aimed at examining the influence of diet composition on the trophic transfer of inorganic Hg (iHg) and methylmercury (MeHg) in the Pacific cupped oyster Crassostrea gigas. The pulse-chase feeding method was used with two radiolabeled feed items: a heterotrophic protist (Uronema marina) and phytoplankton with a diatom model, Thalassiosira pseudonana. Depuration of dietary Hg in the oysters was followed for 50 d. Kinetic parameters including Assimilation Efficiency (AE) and efflux rate constant (ke) were calculated. Our results shown that oysters fed on ciliates assimilated 96 ± 1% and 31 ± 2% of the ingested MeHg and iHg respectively while these elements were similarly assimilated in the oysters fed on phytoplankton (78 ± 3% and 86 ± 4% for MeHg and iHg, respectively). Mercury assimilation in oyster is thus diet dependent (significant differences in AE, p < 0.05), metal species-dependent and likely resulting from variations in Hg bioavailability in the two feed items tested and a gut passage time-dependent of the ingested matrix. |
author2 |
Environment Laboratories (IAEA) International Atomic Energy Agency Vienna (IAEA) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Marine Environment Laboratories Monaco (IAEA-MEL) |
format |
Article in Journal/Newspaper |
author |
Metian, Marc Pouil, Simon Dupuy, Christine Teyssié, Jean-Louis Warnau, Michel Bustamante, Paco |
author_facet |
Metian, Marc Pouil, Simon Dupuy, Christine Teyssié, Jean-Louis Warnau, Michel Bustamante, Paco |
author_sort |
Metian, Marc |
title |
Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas |
title_short |
Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas |
title_full |
Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas |
title_fullStr |
Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas |
title_full_unstemmed |
Influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the Pacific cupped oyster Crassostrea gigas |
title_sort |
influence of food (ciliate and phytoplankton) on the trophic transfer of inorganic and methyl-mercury in the pacific cupped oyster crassostrea gigas |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02561065 https://hal.archives-ouvertes.fr/hal-02561065/document https://hal.archives-ouvertes.fr/hal-02561065/file/Metian%20et%20al%202020%20ENPO.pdf https://doi.org/10.1016/j.envpol.2019.113503 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
ISSN: 0269-7491 EISSN: 1873-6424 Environmental Pollution https://hal.archives-ouvertes.fr/hal-02561065 Environmental Pollution, Elsevier, 2020, 257, pp.113503. ⟨10.1016/j.envpol.2019.113503⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envpol.2019.113503 hal-02561065 https://hal.archives-ouvertes.fr/hal-02561065 https://hal.archives-ouvertes.fr/hal-02561065/document https://hal.archives-ouvertes.fr/hal-02561065/file/Metian%20et%20al%202020%20ENPO.pdf doi:10.1016/j.envpol.2019.113503 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.envpol.2019.113503 |
container_title |
Environmental Pollution |
container_volume |
257 |
container_start_page |
113503 |
_version_ |
1766394037732900864 |