Data from: Evolutionary responses of a coccolithophorid Gephyrocapsa oceanica to ocean acidification

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 up-regulation 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.