Concentration of mercury and other metals in an Arctic planktonic food web under a climate warming scenario

Delove Abraham Asiedu  Abraham Asiedu; Jens Søndergaard; Sigrun  Jonasdottir; Thomas  Juul-Pedersen; Marja Koski

doi:10.1016/j.marpolbul.2023.115436

Concentration of mercury and other metals in an Arctic planktonic food web under a climate warming scenario

Delove Abraham Asiedu Abraham Asiedu^*, Jens Søndergaard, Sigrun Jonasdottir, Thomas Juul-Pedersen, Marja Koski

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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Abstract

Arctic marine ecosystems act as a global sink of mercury (Hg) and other metals, and high concentrations of these have been measured in higher trophic-level organisms. Nevertheless, the concentrations of metals at the basis of the marine food web in the Arctic is less known despite the likelihood of biomagnification from dietary sources. We investigated the concentrations of mercury (Hg) and other metals in different size fractions of plankton in West Greenland. All size fractions contained detectable levels of Hg (ranging from 4.8 to 241.3 ng g dw ⁻¹) at all stations, although with high geographic variability, likely reflecting the sources of mercury (e.g., meltwater). In many cases, the concentrations in the larger-size fractions were lower than in the smaller-size fractions, suggesting depuration through the metabolic activity of mesozooplankton. Concentrations of Cd, Pb, V, Ni, and Cr were higher than previously reported elsewhere in the Arctic.

Original language	English
Article number	115436
Journal	Marine Pollution Bulletin
Volume	194
Issue	Part B
Number of pages	14
ISSN	0025-326X
DOIs	https://doi.org/10.1016/j.marpolbul.2023.115436
Publication status	Published - Sept 2023

Keywords

Arctic
Biomagnification
Heavy metals
Hg
Plankton

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title = "Concentration of mercury and other metals in an Arctic planktonic food web under a climate warming scenario",

abstract = "Arctic marine ecosystems act as a global sink of mercury (Hg) and other metals, and high concentrations of these have been measured in higher trophic-level organisms. Nevertheless, the concentrations of metals at the basis of the marine food web in the Arctic is less known despite the likelihood of biomagnification from dietary sources. We investigated the concentrations of mercury (Hg) and other metals in different size fractions of plankton in West Greenland. All size fractions contained detectable levels of Hg (ranging from 4.8 to 241.3 ng g dw −1) at all stations, although with high geographic variability, likely reflecting the sources of mercury (e.g., meltwater). In many cases, the concentrations in the larger-size fractions were lower than in the smaller-size fractions, suggesting depuration through the metabolic activity of mesozooplankton. Concentrations of Cd, Pb, V, Ni, and Cr were higher than previously reported elsewhere in the Arctic.",

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doi = "10.1016/j.marpolbul.2023.115436",

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Concentration of mercury and other metals in an Arctic planktonic food web under a climate warming scenario. / Abraham Asiedu, Delove Abraham Asiedu; Søndergaard, Jens; Jonasdottir, Sigrun et al.
In: Marine Pollution Bulletin, Vol. 194, No. Part B, 115436, 09.2023.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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AU - Søndergaard, Jens

AU - Jonasdottir, Sigrun

AU - Juul-Pedersen, Thomas

AU - Koski, Marja

PY - 2023/9

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N2 - Arctic marine ecosystems act as a global sink of mercury (Hg) and other metals, and high concentrations of these have been measured in higher trophic-level organisms. Nevertheless, the concentrations of metals at the basis of the marine food web in the Arctic is less known despite the likelihood of biomagnification from dietary sources. We investigated the concentrations of mercury (Hg) and other metals in different size fractions of plankton in West Greenland. All size fractions contained detectable levels of Hg (ranging from 4.8 to 241.3 ng g dw −1) at all stations, although with high geographic variability, likely reflecting the sources of mercury (e.g., meltwater). In many cases, the concentrations in the larger-size fractions were lower than in the smaller-size fractions, suggesting depuration through the metabolic activity of mesozooplankton. Concentrations of Cd, Pb, V, Ni, and Cr were higher than previously reported elsewhere in the Arctic.

AB - Arctic marine ecosystems act as a global sink of mercury (Hg) and other metals, and high concentrations of these have been measured in higher trophic-level organisms. Nevertheless, the concentrations of metals at the basis of the marine food web in the Arctic is less known despite the likelihood of biomagnification from dietary sources. We investigated the concentrations of mercury (Hg) and other metals in different size fractions of plankton in West Greenland. All size fractions contained detectable levels of Hg (ranging from 4.8 to 241.3 ng g dw −1) at all stations, although with high geographic variability, likely reflecting the sources of mercury (e.g., meltwater). In many cases, the concentrations in the larger-size fractions were lower than in the smaller-size fractions, suggesting depuration through the metabolic activity of mesozooplankton. Concentrations of Cd, Pb, V, Ni, and Cr were higher than previously reported elsewhere in the Arctic.

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KW - Biomagnification

KW - Heavy metals

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KW - Plankton

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JO - Marine Pollution Bulletin

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Concentration of mercury and other metals in an Arctic planktonic food web under a climate warming scenario

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