Articles | Volume 17, issue 3
https://doi.org/10.5194/bg-17-635-2020
https://doi.org/10.5194/bg-17-635-2020
Research article
 | 
07 Feb 2020
Research article |  | 07 Feb 2020

The Arctic picoeukaryote Micromonas pusilla benefits from ocean acidification under constant and dynamic light

Emily White, Clara J. M. Hoppe, and Björn Rost

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Cited articles

AMAP: AMAP Assessment 2018: Arctic Ocean Acidifcation, Arctic Monitoring and Assessment Programme (AMAP), Tromsø, Norway, 187 pp., 2018. 
Apel, K. and Hirt, H.: Reactive oxygen species: metabolism, oxidative stress, and signal transduction, Annu. Rev. Plant Biol., 55, 373–399, https://doi.org/10.1146/annurev.arplant.55.031903.141701, 2004. 
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Asada, K.: The water-water cycle in chloroplasts: Scavenging of Active Oxygens and Dissipation of Excess Photons, Annu. Rev. Plant Phys., 50, 601–639, https://doi.org/10.1146/annurev.arplant.50.1.601, 1999. 
Bach, L. T., Mackinder, L. C., Schulz, K. G., Wheeler, G., Schroeder, D. C., Brownlee, C., and Riebesell, U.: Dissecting the impact of CO2 and pH on the mechanisms of photosynthesis and calcification in the coccolithophore Emiliania huxleyi, New. Phytol., 199, 121–134, https://doi.org/10.1111/nph.12225, 2013. 
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Short summary
The Arctic picoeukaryote Micromonas pusilla was acclimated to two pCO2 levels under a constant and a dynamic light, simulating more realistic light fields. M. pusilla was able to benefit from ocean acidification with an increase in growth rate, irrespective of the light regime. In dynamic light M. pusilla optimised its photophysiology for effective light usage during both low- and high-light periods. This highlights M. pusilla is likely to cope well with future conditions in the Arctic Ocean.
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