Biogeosciences
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Articles | Volume 23, issue 15
Articles | Volume 23, issue 15
https://doi.org/10.5194/bg-23-5571-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-5571-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 15
Research article
 | 
12 Aug 2026
Research article |  | 12 Aug 2026

The Ni cycle in the Southern Ocean: insights from Ni concentrations, isotopes and metagenomics

Nolwenn Lemaitre, Emile Faure, Ricardo Zamora, Corey Archer, Matthias Sieber, Michael Ellwood, Christel Hassler, Yajuan Lin, Nicolas Cassar, Lois Maignien, and Derek Vance

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Short summary
Nickel (Ni) is a micronutrient used by microorganisms in key metabolic processes. In the Southern Ocean, we observe heavy Ni isotope compositions in surface waters from lower latitudes and near the Mertz Glacier. Combined with metagenomics, we show that isotope variation may be due preferential uptake of Ni by microorganisms using Ni-SOD and Urease enzymes. This demonstrates how marine microbiology can influence the chemistry of the ocean.
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