Growth rate, stoichiometry and photosynthetic parameters for Chaetoceros wighamii under different growing conditions.

The growth conditions depict acclimation to: Temperature (Temp) in °C, Light in μmol photons m-2 s-1 and the growth phase: exponential (Exp) or stationary growth under N (N lim), P (P lim) and Si (Si lim) limitation. Growth rates are d-1 ± Standard Error (S1 Fig). Samples at the stationary growth phase were taken after minimum 3 days with no increase in cell concentration. Growth curves up to the point of stationary growth phase harvesting are presented in S2, S3 and S4 Figs for N, P and Si limitation respectively. Stoichiometric rates are molar ratios except for C:Chl a which is the weight ratio. All the photosynthetic parameters are from O2 production. The maximum light utilization coefficient α* (the initial slope of the PE curve normalized to Chl a) is in mol O2 (mg Chl a)-1 h-1 (mol photons m-2 s-1)-1; the photosynthetic maximum, Pm* is in μmol O2 (mg Chl a)-1 h-1; the photosynthetic quotient (PQ) is the ratio between O2 produced and C fixed, expressed at both α* and Pm*; the compensation point, Ec, and the light saturation parameter, Ek, are both in μmol photons m-2 s-1. ND = not determined.Growth rate, stoichiometry and photosynthetic parameters for Chaetoceros wighamii under different growing conditions.