Diel variations in the photosynthetic parameters of coastal marine phytoplankton

The diel variations in the assimilation number, P m B , of natural assemblages of coastal marine phytoplankton were examined and a working model proposed to characterize the apparent diel rhythm. No rhythm could be distinguished for the initial slope of the light saturation curve, α , although α and P m B were highly correlated and the daily and hourly variations in α were as great as those in P m B . Diel variations in the derived …