This article is a contribution to the special section “New model systems for experimental evolution” being edited by Sinéad Collins, with Daphne Fairbairn as the handling editor.
EVOLUTIONARY RESPONSES OF A COCCOLITHOPHORID GEPHYROCAPSA OCEANICA TO OCEAN ACIDIFICATION†
Version of Record online: 13 APR 2013
© 2013 The Author(s). Evolution © 2013 The Society for the Study of Evolution.
Volume 67, Issue 7, pages 1869–1878, July 2013
How to Cite
Jin, P., Gao, K. and Beardall, J. (2013), EVOLUTIONARY RESPONSES OF A COCCOLITHOPHORID GEPHYROCAPSA OCEANICA TO OCEAN ACIDIFICATION. Evolution, 67: 1869–1878. doi: 10.1111/evo.12112
- Issue online: 1 JUL 2013
- Version of Record online: 13 APR 2013
- Accepted manuscript online: 23 MAR 2013 06:56AM EST
- Manuscript Accepted: 5 MAR 2013
- Manuscript Received: 30 JUN 2012
- National Basic Research Program of China. Grant Number: 2009CB421207
- National Natural Science Foundation. Grant Numbers: 40930846, 41120164007
- MOST. Grant Number: S2012GR0290
The ongoing ocean acidification associated with a changing carbonate system may impose profound effects on marine planktonic calcifiers. Here, we show that a coccolithophore, Gephyrocapsa oceanica, evolved in response to an elevated CO2 concentration of 1000 μatm (pH reduced to 7.8) in a long-term (∼670 generations) selection experiment. The high CO2-selected cells showed increases in photosynthetic carbon fixation, growth rate, cellular particulate organic carbon (POC) or nitrogen (PON) production, and a decrease in C:N elemental ratio, indicating a greater upregulation of PON than of POC production under the ocean acidification condition. Cells from the low CO2 selection process shifted to high CO2 exposure showed an enhanced cellular POC and PON production rates. Our data suggest that the coccolithophorid could adapt to ocean acidification with enhanced assimilations of carbon and nitrogen but decreased C:N ratios.