Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches
Despite the limited direct anthropogenic mercury (Hg) inputs in the circumpolar Arctic, elevated concentrations of methylmercury (MeHg) are accumulated in Arctic marine biota. However, the MeHg production and bioaccumulation pathways in these ecosystems have not been completely unraveled. We measure...
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Online Access: | https://hdl.handle.net/11250/2686722 https://doi.org/10.1021/acs.est.0c03285 |
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ftninstnf:oai:brage.nina.no:11250/2686722 2023-05-15T13:16:19+02:00 Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches Renedo, Marina Amouroux, David Albert, Céline Bérail, Sylvain Bråthen, Vegard Sandøy Gavrilo, Maria Grémillet, David Helgason, Hálfdán H. Jakubas, Dariusz Mosbech, Anders Strøm, Hallvard Tessier, Emmanuel Wojczulanis-Jakubas, Katarzyna Bustamante, Paco Fort, Jérôme Arctic 2020 application/pdf https://hdl.handle.net/11250/2686722 https://doi.org/10.1021/acs.est.0c03285 eng eng Andre: French Arctic InitiativeCNRS Andre: French Agency for National Research Andre: French Polar Institute urn:issn:0013-936X https://hdl.handle.net/11250/2686722 https://doi.org/10.1021/acs.est.0c03285 cristin:1840447 Environmental Science and Technology VDP::Miljøteknologi: 610 VDP::Environmental engineering: 610 Peer reviewed Journal article 2020 ftninstnf https://doi.org/10.1021/acs.est.0c03285 2021-12-23T07:16:54Z Despite the limited direct anthropogenic mercury (Hg) inputs in the circumpolar Arctic, elevated concentrations of methylmercury (MeHg) are accumulated in Arctic marine biota. However, the MeHg production and bioaccumulation pathways in these ecosystems have not been completely unraveled. We measured Hg concentrations and stable isotope ratios of Hg, carbon, and nitrogen in the feathers and blood of geolocator-tracked little auk Alle alle from five Arctic breeding colonies. The wide-range spatial mobility and tissue-specific Hg integration times of this planktivorous seabird allowed the exploration of their spatial (wintering quarters/breeding grounds) and seasonal (nonbreeding/breeding periods) MeHg exposures. An east-to-west increase of head feather Hg concentrations (1.74–3.48 μg·g–1) was accompanied by significant spatial trends of Hg isotope (particularly Δ199Hg: 0.96–1.13‰) and carbon isotope (δ13C: −20.6 to −19.4‰) ratios. These trends suggest a distinct mixing/proportion of MeHg sources between western North Atlantic and eastern Arctic regions. Higher Δ199Hg values (+0.4‰) in northern colonies indicate an accumulation of more photochemically impacted MeHg, supporting shallow MeHg production and bioaccumulation in high Arctic waters. The combination of seabird tissue isotopic analysis and spatial tracking helps in tracing the MeHg sources at various spatio-temporal scales. acceptedVersion Article in Journal/Newspaper Alle alle Arctic arctic marine biota Arctic little auk North Atlantic Norwegian Institute for Nature Research: Brage NINA Arctic Environmental Science & Technology 54 21 13619 13629 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
VDP::Miljøteknologi: 610 VDP::Environmental engineering: 610 |
spellingShingle |
VDP::Miljøteknologi: 610 VDP::Environmental engineering: 610 Renedo, Marina Amouroux, David Albert, Céline Bérail, Sylvain Bråthen, Vegard Sandøy Gavrilo, Maria Grémillet, David Helgason, Hálfdán H. Jakubas, Dariusz Mosbech, Anders Strøm, Hallvard Tessier, Emmanuel Wojczulanis-Jakubas, Katarzyna Bustamante, Paco Fort, Jérôme Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches |
topic_facet |
VDP::Miljøteknologi: 610 VDP::Environmental engineering: 610 |
description |
Despite the limited direct anthropogenic mercury (Hg) inputs in the circumpolar Arctic, elevated concentrations of methylmercury (MeHg) are accumulated in Arctic marine biota. However, the MeHg production and bioaccumulation pathways in these ecosystems have not been completely unraveled. We measured Hg concentrations and stable isotope ratios of Hg, carbon, and nitrogen in the feathers and blood of geolocator-tracked little auk Alle alle from five Arctic breeding colonies. The wide-range spatial mobility and tissue-specific Hg integration times of this planktivorous seabird allowed the exploration of their spatial (wintering quarters/breeding grounds) and seasonal (nonbreeding/breeding periods) MeHg exposures. An east-to-west increase of head feather Hg concentrations (1.74–3.48 μg·g–1) was accompanied by significant spatial trends of Hg isotope (particularly Δ199Hg: 0.96–1.13‰) and carbon isotope (δ13C: −20.6 to −19.4‰) ratios. These trends suggest a distinct mixing/proportion of MeHg sources between western North Atlantic and eastern Arctic regions. Higher Δ199Hg values (+0.4‰) in northern colonies indicate an accumulation of more photochemically impacted MeHg, supporting shallow MeHg production and bioaccumulation in high Arctic waters. The combination of seabird tissue isotopic analysis and spatial tracking helps in tracing the MeHg sources at various spatio-temporal scales. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Renedo, Marina Amouroux, David Albert, Céline Bérail, Sylvain Bråthen, Vegard Sandøy Gavrilo, Maria Grémillet, David Helgason, Hálfdán H. Jakubas, Dariusz Mosbech, Anders Strøm, Hallvard Tessier, Emmanuel Wojczulanis-Jakubas, Katarzyna Bustamante, Paco Fort, Jérôme |
author_facet |
Renedo, Marina Amouroux, David Albert, Céline Bérail, Sylvain Bråthen, Vegard Sandøy Gavrilo, Maria Grémillet, David Helgason, Hálfdán H. Jakubas, Dariusz Mosbech, Anders Strøm, Hallvard Tessier, Emmanuel Wojczulanis-Jakubas, Katarzyna Bustamante, Paco Fort, Jérôme |
author_sort |
Renedo, Marina |
title |
Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches |
title_short |
Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches |
title_full |
Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches |
title_fullStr |
Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches |
title_full_unstemmed |
Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches |
title_sort |
contrasting spatial and seasonal trends of methylmercury exposure pathways of arctic seabirds: combination of large-scale tracking and stable isotopic approaches |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2686722 https://doi.org/10.1021/acs.est.0c03285 |
op_coverage |
Arctic |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Alle alle Arctic arctic marine biota Arctic little auk North Atlantic |
genre_facet |
Alle alle Arctic arctic marine biota Arctic little auk North Atlantic |
op_source |
Environmental Science and Technology |
op_relation |
Andre: French Arctic InitiativeCNRS Andre: French Agency for National Research Andre: French Polar Institute urn:issn:0013-936X https://hdl.handle.net/11250/2686722 https://doi.org/10.1021/acs.est.0c03285 cristin:1840447 |
op_doi |
https://doi.org/10.1021/acs.est.0c03285 |
container_title |
Environmental Science & Technology |
container_volume |
54 |
container_issue |
21 |
container_start_page |
13619 |
op_container_end_page |
13629 |
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1766273495046553600 |