Seawater carbonate chemistry and changes in isotope fractionation during nitrate assimilation by marine eukaryotic and prokaryotic algae

We measured N and O isotope effects during nitrate assimilation and physiological states of the marine diatom Thalassiosira weissflogii and Synechococcus under different pH (8.1 or 7.8) and pCO2 (400 or 800 μatm) conditions.