Articles | Volume 22, issue 20
https://doi.org/10.5194/bg-22-5877-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-5877-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Oct 2025
Research article |
| 22 Oct 2025
| 22 Oct 2025
Zinc stimulation of phytoplankton in a low-carbon-dioxide, coastal Antarctic environment: evidence for the Zn hypothesis
Riss M. Kell
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
now at: Gloucester Marine Genomics Institute, Gloucester, MA 01930, USA
previously published under the name Riss Kellogg
Adam V. Subhas
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Nicole L. Schanke
Hollings Marine Laboratory, College of Charleston, Charleston, SC 29424, USA
Lauren E. Lees
Department of Ecology and Evolutionary Biology, University of California at Irvine, Irvine, CA 92697, USA
Rebecca J. Chmiel
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Deepa Rao
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Margaret M. Brisbin
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Dawn M. Moran
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Matthew R. McIlvin
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Francesco Bolinesi
Department of Biology, Università degli Studi di Napoli Federico II, Complesso di Monte Sant'Angelo, Via Cinthia 21, 80126, Naples, Italy
Olga Mangoni
Department of Biology, Università degli Studi di Napoli Federico II, Complesso di Monte Sant'Angelo, Via Cinthia 21, 80126, Naples, Italy
Raffaella Casotti
Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121, Naples, Italy
Cecilia Balestra
National Institute of Oceanography and Applied Geophysics, 34010, Sgonico (TS), Italy
Tristan J. Horner
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Robert B. Dunbar
Doerr School of Sustainability, Stanford University, Stanford, CA 94305, USA
Andrew E. Allen
Microbial & Environmental Genomics, J. Craig Venter Institute, San Diego, CA 92093, USA
Scripps Institution of Oceanography, Integrative Oceanography Division, University of California, San Diego, CA 92037, USA
Giacomo R. DiTullio
Hollings Marine Laboratory, College of Charleston, Charleston, SC 29424, USA
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
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Despite interest in modeling the biogeochemical uptake and cycling of the trace metal zinc (Zn), measurements of Zn uptake in natural marine phytoplankton communities have not been conducted previously. To fill this gap, we employed a stable isotope uptake rate measurement method to quantify Zn uptake into natural phytoplankton assemblages within the Southern Ocean. Zn demand was high and rapid enough to depress the inventory of Zn available to phytoplankton on seasonal timescales.
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Natalie R. Cohen, Abigail E. Noble, Dawn M. Moran, Matthew R. McIlvin, Tyler J. Goepfert, Nicholas J. Hawco, Christopher R. German, Tristan J. Horner, Carl H. Lamborg, John P. McCrow, Andrew E. Allen, and Mak A. Saito
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Short summary
Photosynthetic productivity is strongly influenced by water column nutrient availability. Despite the importance of zinc, definitive evidence for oceanic zinc limitation of photosynthesis has been scarce. We applied multiple biogeochemical measurements to a field site in Terra Nova Bay, Antarctica, to demonstrate that the phytoplankton community was experiencing zinc limitation. This field evidence paves the way for future experimental studies to consider Zn as a limiting oceanic micronutrient.
Photosynthetic productivity is strongly influenced by water column nutrient availability....
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