Evolutionary responses of a coccolithophorid Gephyrocapsa oceanica to ocean acidification.
Evolution
; 67(7): 1869-78, 2013 Jul.
Article
en En
| MEDLINE
| ID: mdl-23815645
ABSTRACT
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 (â¼670 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 CN 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 CN ratios.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Evolución Biológica
/
Haptophyta
Idioma:
En
Revista:
Evolution
Año:
2013
Tipo del documento:
Article
País de afiliación:
China