Diel quenching of Southern Ocean phytoplankton fluorescence is related to iron limitation

Schallenberg, Christina; Strzepek, Robert F.; Schuback, Nina; Clementson, Lesley A.; Boyd, Philip W.; Trull, Thomas W.

doi:https://doi.org/10.5194/bg-17-793-2020

Articles | Volume 17, issue 3

https://doi.org/10.5194/bg-17-793-2020

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

https://doi.org/10.5194/bg-17-793-2020

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

Articles | Volume 17, issue 3

Research article

|

17 Feb 2020

Research article |

| 17 Feb 2020

Diel quenching of Southern Ocean phytoplankton fluorescence is related to iron limitation

Christina Schallenberg, Robert F. Strzepek, Nina Schuback, Lesley A. Clementson, Philip W. Boyd, and Thomas W. Trull

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Final revised paper (published on 17 Feb 2020)
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Preprint (discussion started on 04 Sep 2019)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review of ‘Diel quenching of Southern Ocean phytoplankton fluorescence is related to iron limitation’ by Schallenberg et al.', Anonymous Referee #1, 27 Sep 2019
- AC1: 'Response to all comments', Christina Schallenberg, 13 Nov 2019
RC2: 'Review of ‘Diel quenching of Southern Ocean phytoplankton fluorescence is related to iron limitation’ by Schallenberg et al.', Anonymous Referee #2, 28 Oct 2019
- AC2: 'Response to all comments', Christina Schallenberg, 13 Nov 2019

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to minor revisions (review by editor) (26 Nov 2019) by Koji Suzuki

AR by Natascha Töpfer on behalf of the Authors (18 Dec 2019) Author's response

ED: Publish subject to technical corrections (03 Jan 2020) by Koji Suzuki

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Short summary

Measurements of phytoplankton health still require the use of research vessels and are thus costly and sparse. In this paper we propose a new way to assess the health of phytoplankton using simple fluorescence measurements, which can be made autonomously. In the Southern Ocean, where the most limiting nutrient for phytoplankton is iron, we found a relationship between iron limitation and the depression of fluorescence under high light, the so-called non-photochemical quenching of fluorescence.