Fe(II) stability in coastal seawater during experiments in Patagonia, Svalbard, and Gran Canaria

Hopwood, Mark J.; Santana-González, Carolina; Gallego-Urrea, Julian; Sanchez, Nicolas; Achterberg, Eric P.; Ardelan, Murat V.; Gledhill, Martha; González-Dávila, Melchor; Hoffmann, Linn; Leiknes, Øystein; Santana-Casiano, Juana Magdalena; Tsagaraki, Tatiana M.; Turner, David

doi:https://doi.org/10.5194/bg-17-1327-2020

Articles | Volume 17, issue 5

https://doi.org/10.5194/bg-17-1327-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-17-1327-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 5

Research article

|

16 Mar 2020

Research article |

| 16 Mar 2020

Fe(II) stability in coastal seawater during experiments in Patagonia, Svalbard, and Gran Canaria

Mark J. Hopwood, Carolina Santana-González, Julian Gallego-Urrea, Nicolas Sanchez, Eric P. Achterberg, Murat V. Ardelan, Martha Gledhill, Melchor González-Dávila, Linn Hoffmann, Øystein Leiknes, Juana Magdalena Santana-Casiano, Tatiana M. Tsagaraki, and David Turner

Supplement

https://doi.org/10.5194/bg-17-1327-2020-supplement

Data sets

Response of the microbial food web to gradients of organic matter and grazing pressure and multi-stressor effect in incubation experiments in three different marine ecosystems: Patagonia, Arctic and Mediterranean N. Sanchez, Ø. Leiknes, T. M. Tsagaraki, M. Hopwood, J. Gallego-Urrea, M. Avarachen, C. Kuttivadakkethil, L. Antonio, J. Kankus, A. L. King, E. R. Reggiani, G. Bratbak, A. Larsen, R. A. Sandaa, J. K. Egge, D. Turner, S. Besiktepe, K. C. Bizsel, N. Bizsel, J. L. Iriarte, H. González, R. Torres, R. G. J. Bellerby, T. F Thingstad, L. Hoffmann, E. P. Achterberg, O. Vadstein, Y. Olsen, and M. V. Ardelan https://doi.org/10.1594/PANGAEA.911130

Short summary

Fe is an essential micronutrient. Fe(III)-organic species are thought to account for > 99 % of dissolved Fe in seawater. Here we quantified Fe(II) during experiments in Svalbard, Gran Canaria, and Patagonia. Fe(II) was always a measurable fraction of dissolved Fe up to 65 %. Furthermore, when Fe(II) was allowed to decay in the dark, it remained present longer than predicted by kinetic equations, suggesting that Fe(II) is a more important fraction of dissolved Fe in seawater than widely recognized.