Culture dynamics and seawater chemistry during the experiments with haploid (orange) and diploid (blue) Emiliania huxleyi grown with (N-replete, filled symbols) and without (N-limited, open symbols) NO
−supplementation; (a) Cell concentrations; (b) Specific growth rates; (c) Concentrations of nitrite (NO
−) and nitrate (NO
−); (d) Concentrations of phosphate (PO
3−); (e) Total Alkalinity (TA); (f) Dissolved inorganic carbon (DIC). Error bars denote 1 SD (n = 3).