Articles | Volume 21, issue 24
https://doi.org/10.5194/bg-21-5685-2024
https://doi.org/10.5194/bg-21-5685-2024
Research article
 | 
19 Dec 2024
Research article |  | 19 Dec 2024

High metabolic zinc demand within native Amundsen and Ross sea phytoplankton communities determined by stable isotope uptake rate measurements

Riss M. Kell, Rebecca J. Chmiel, Deepa Rao, Dawn M. Moran, Matthew R. McIlvin, Tristan J. Horner, Nicole L. Schanke, Ichiko Sugiyama, Robert B. Dunbar, Giacomo R. DiTullio, and Mak A. Saito

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Cited articles

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Arrigo, K. R., Lowry, K. E., and van Dijken, G. L.: Annual changes in sea ice and phytoplankton in polynyas of the Amundsen Sea, Antarctica, Deep-Sea Res. Pt. II, 71–76, 5–15, https://doi.org/10.1016/j.dsr2.2012.03.006, 2012. 
Asper, V. L. and Smith, W. O.: Particle fluxes during austral spring and summer in the southern Ross Sea, Antarctica, J. Geophys. Res.-Oceans, 104, 5345–5359, https://doi.org/10.1029/1998jc900067, 1999. 
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Baars, O., Abouchami, W., Galer, S. J. G., Boye, M., and Croot, P. L.: Dissolved cadmium in the Southern Ocean: Distribution, speciation, and relation to phosphate, Limnol. Oceanogr., 59, 385–399, https://doi.org/10.4319/LO.2014.59.2.0385, 2014. 
Short summary
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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