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

Supplement

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

Data sets

Environmental data for Davis 14/15 ocean acidification minicosm experiment S. L. Deppeler, A. T. Davidson, and K. G. Schulz https://doi.org/10.4225/15/599a7dfe9470a

Data for manuscript 'Ocean acidification of a coastal Antarctic marine microbial community reveals a critical threshold for CO2 tolerance in phytoplankton productivity' S. L. Deppeler, K. etrou, K. G. Schulz, A. T. Davidson, J. Mckinlay, I., Pearce, and K. J. Westwood https://doi.org/10.4225/15/599a7cc747c61

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.