Ocean acidification of a coastal Antarctic marine microbial community reveals a critical threshold for CO<sub>2</sub> tolerance in phytoplankton productivity

Deppeler, Stacy; Petrou, Katherina; Schulz, Kai G.; Westwood, Karen; Pearce, Imojen; McKinlay, John; Davidson, Andrew

doi:https://doi.org/10.5194/bg-15-209-2018

Articles | Volume 15, issue 1

https://doi.org/10.5194/bg-15-209-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

The Ocean in a High-CO₂ World IV

https://doi.org/10.5194/bg-15-209-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 1

Research article

|

11 Jan 2018

Research article |

| 11 Jan 2018

Ocean acidification of a coastal Antarctic marine microbial community reveals a critical threshold for CO₂ tolerance in phytoplankton productivity

Stacy Deppeler, Katherina Petrou, Kai G. Schulz, Karen Westwood, Imojen Pearce, John McKinlay, and Andrew Davidson

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Final revised paper (published on 11 Jan 2018)
Supplement to the final revised paper
Preprint (discussion started on 29 Jun 2017)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Comments on bg-2017-226 by Deppeler et al.', Anonymous Referee #1, 01 Aug 2017
- AC1: 'Author Response to Reviewer #1', Stacy Deppeler, 22 Sep 2017
RC2: 'Review for bg-2017-226', Anonymous Referee #2, 10 Aug 2017
- AC2: 'Author Response to Reviewer #2', Stacy Deppeler, 22 Sep 2017

Peer-review completion

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

ED: Publish subject to minor revisions (Editor review) (25 Sep 2017) by Richard Matear

AR by Stacy Deppeler on behalf of the Authors (10 Oct 2017) Author's response Manuscript

ED: Publish subject to technical corrections (06 Nov 2017) by Richard Matear

Short summary

We combined productivity and photophysiology measurements to investigate the effects of ocean acidification on a natural Antarctic marine microbial community. Our study identifies a threshold for CO₂ tolerance in the phytoplankton community between 953 and 1140 μatm of CO₂, above which productivity declines. Bacteria were tolerant to CO₂ up to 1641 μatm. We identify physiological changes in the phytoplankton at high CO₂ that allowed them to acclimate to the high CO₂ treatment.

Ocean acidification of a coastal Antarctic marine microbial community reveals a critical threshold for CO2 tolerance in phytoplankton productivity

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Interactive discussion

Peer-review completion

Ocean acidification of a coastal Antarctic marine microbial community reveals a critical threshold for CO₂ tolerance in phytoplankton productivity