Articles | Volume 21, issue 20
https://doi.org/10.5194/bg-21-4637-2024
https://doi.org/10.5194/bg-21-4637-2024
Research article
 | 
28 Oct 2024
Research article |  | 28 Oct 2024

Temperature-enhanced effects of iron on Southern Ocean phytoplankton

Charlotte Eich, Mathijs van Manen, J. Scott P. McCain, Loay J. Jabre, Willem H. van de Poll, Jinyoung Jung, Sven B. E. H. Pont, Hung-An Tian, Indah Ardiningsih, Gert-Jan Reichart, Erin M. Bertrand, Corina P. D. Brussaard, and Rob Middag

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Cited articles

Aflenzer, H., Hoffmann, L., Holmes, T., Wuttig, K., Genovese, C., and Bowie, A. R.: Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica , Polar Biol., 46, 1163–1173, https://doi.org/10.1007/s00300-023-03191-z, 2023. 
Alderkamp, A.-C., Van Dijken, G.-L., Lowry, K. E., Connelly, T. L., Lagerström, M., Sherrell, R. M., Haskins, C., Rogalsky, E., Schofield, O., Stammerjohn, S. E., Yager, P. L., and Arrigo, K. R.: Fe availability drives phytoplankton photosynthesis rates during spring bloom in the Amundsen Sea Polynya, Antarctica, Elementa, 3, 43, https://doi.org/10.12952/journal.elementa.000043, 2015. 
Alderkamp, A.-C., Van Dijken, G. L., Lowry, K. E., Lewis, K. M., Joy-Warren, H. L., Van De Poll, W., Laan, P., Gerringa, L., Delmont, T. O., Jenkins, B. D., and Arrigo, K. R.: Effects of iron and light availability on phytoplankton photosynthetic properties in the Ross Sea, Mar. Ecol. Prog. Ser., 621, 33–50, https://doi.org/10.3354/meps13000, 2019. 
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung: Polar Research and Supply Vessel POLARSTERN Operated by the Alfred-Wegener-Institute, Journal of large-scale research facilities, 3, A119, https://doi.org/10.17815/jlsrf-3-163, 2017. 
Andrew, S. M., Morell, H. T., Strzepek, R. F., Boyd, P. W., and Ellwood, M. J.: Iron Availability Influences the Tolerance of Southern Ocean Phytoplankton to Warming and Elevated Irradiance, Front. Mar. Sci., 6, 681, https://doi.org/10.3389/fmars.2019.00681, 2019. 
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Short summary
Phytoplankton growth in the Southern Ocean (SO) is often limited by low iron (Fe) concentrations. Sea surface warming impacts Fe availability and can affect phytoplankton growth. We used shipboard  Fe clean incubations to test how changes in Fe and temperature affect SO phytoplankton. Their abundances usually increased with Fe addition and temperature increase, with Fe being the major factor. These findings imply potential shifts in ecosystem structure, impacting food webs and elemental cycling.
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