Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches

Marina Renedo; David Amouroux; Céline Albert; Sylvain Bérail; Vegard S. Bråthen; Maria Gavrilo; David Grémillet; Hálfdán H. Helgason; Dariusz Jakubas; Anders Mosbech; Hallvard Strøm; Emmanuel Tessier; Katarzyna Wojczulanis-Jakubas; Paco Bustamante; Jérôme Fort

doi:10.1021/acs.est.0c03285

Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches

Marina Renedo^*, David Amouroux, Céline Albert, Sylvain Bérail, Vegard S. Bråthen, Maria Gavrilo, David Grémillet, Hálfdán H. Helgason, Dariusz Jakubas, Anders Mosbech, Hallvard Strøm, Emmanuel Tessier, Katarzyna Wojczulanis-Jakubas, Paco Bustamante, Jérôme Fort

^*Corresponding author af dette arbejde

Institut for Ecoscience - Arktisk miljø

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

25 Citationer (Scopus)

Abstract

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.

Originalsprog	Engelsk
Tidsskrift	Environmental Science & Technology
Vol/bind	54
Nummer	21
Sider (fra-til)	13619-13629
Antal sider	11
ISSN	0013-936X
DOI	https://doi.org/10.1021/acs.est.0c03285
Status	Udgivet - nov. 2020

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Citationsformater

Renedo, M., Amouroux, D., Albert, C., Bérail, S., Bråthen, V. S., Gavrilo, M., Grémillet, D., Helgason, H. H., Jakubas, D., Mosbech, A., Strøm, H., Tessier, E., Wojczulanis-Jakubas, K., Bustamante, P., & Fort, J. (2020). Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches. Environmental Science & Technology, 54(21), 13619-13629. https://doi.org/10.1021/acs.est.0c03285

@article{ae3ed1ba8e3e4eba8604480007d39efe,

title = "Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches",

abstract = "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.",

author = "Marina Renedo and David Amouroux and C{\'e}line Albert and Sylvain B{\'e}rail and Br{\aa}then, {Vegard S.} and Maria Gavrilo and David Gr{\'e}millet and Helgason, {H{\'a}lfd{\'a}n H.} and Dariusz Jakubas and Anders Mosbech and Hallvard Str{\o}m and Emmanuel Tessier and Katarzyna Wojczulanis-Jakubas and Paco Bustamante and J{\'e}r{\^o}me Fort",

year = "2020",

month = nov,

doi = "10.1021/acs.est.0c03285",

language = "English",

volume = "54",

pages = "13619--13629",

journal = "Environmental Science & Technology",

issn = "0013-936X",

publisher = "American Chemical Society",

number = "21",

}

Renedo, M, Amouroux, D, Albert, C, Bérail, S, Bråthen, VS, Gavrilo, M, Grémillet, D, Helgason, HH, Jakubas, D, Mosbech, A, Strøm, H, Tessier, E, Wojczulanis-Jakubas, K, Bustamante, P & Fort, J 2020, 'Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches', Environmental Science & Technology, bind 54, nr. 21, s. 13619-13629. https://doi.org/10.1021/acs.est.0c03285

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 et al.
I: Environmental Science & Technology, Bind 54, Nr. 21, 11.2020, s. 13619-13629.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

TY - JOUR

T1 - Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds

T2 - Combination of Large-Scale Tracking and Stable Isotopic Approaches

AU - Renedo, Marina

AU - Amouroux, David

AU - Albert, Céline

AU - Bérail, Sylvain

AU - Bråthen, Vegard S.

AU - Gavrilo, Maria

AU - Grémillet, David

AU - Helgason, Hálfdán H.

AU - Jakubas, Dariusz

AU - Mosbech, Anders

AU - Strøm, Hallvard

AU - Tessier, Emmanuel

AU - Wojczulanis-Jakubas, Katarzyna

AU - Bustamante, Paco

AU - Fort, Jérôme

PY - 2020/11

Y1 - 2020/11

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85095461660&partnerID=8YFLogxK

U2 - 10.1021/acs.est.0c03285

DO - 10.1021/acs.est.0c03285

M3 - Journal article

C2 - 33063513

AN - SCOPUS:85095461660

SN - 0013-936X

VL - 54

SP - 13619

EP - 13629

JO - Environmental Science & Technology

JF - Environmental Science & Technology

IS - 21

ER -

Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches

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