Articles | Volume 18, issue 1
Biogeosciences, 18, 251–283, 2021
https://doi.org/10.5194/bg-18-251-2021
Biogeosciences, 18, 251–283, 2021
https://doi.org/10.5194/bg-18-251-2021

Research article 14 Jan 2021

Research article | 14 Jan 2021

Factors controlling the competition between Phaeocystis and diatoms in the Southern Ocean and implications for carbon export fluxes

Cara Nissen and Meike Vogt

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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (09 May 2020) by Anja Engel
AR by Cara Nissen on behalf of the Authors (11 May 2020)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (25 May 2020) by Anja Engel
RR by Anonymous Referee #3 (21 Jul 2020)
RR by Anonymous Referee #4 (02 Aug 2020)
ED: Reconsider after major revisions (10 Aug 2020) by Anja Engel
AR by Cara Nissen on behalf of the Authors (30 Oct 2020)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (08 Nov 2020) by Anja Engel
RR by Anonymous Referee #4 (30 Nov 2020)
ED: Publish as is (01 Dec 2020) by Anja Engel
AR by Cara Nissen on behalf of the Authors (02 Dec 2020)  Author's response    Manuscript
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Short summary
Using a regional Southern Ocean ecosystem model, we find that the relative importance of Phaeocystis and diatoms at high latitudes is controlled by iron and temperature variability, with light levels controlling the seasonal succession in coastal areas. Yet, biomass losses via aggregation and grazing matter as well. We show that the seasonal succession of Phaeocystis and diatoms impacts the seasonality of carbon export fluxes with ramifications for nutrient cycling and food web dynamics.
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