Figure 1. Fatty acid composition and concentration of Thalassiorira pseudonana cultured at different CO₂ treatments.

A) Percentage of polyunsaturated (PUFA), monounsaturated (MUFA), and saturated (SFA) fatty acids relative to total fatty acids during the exponential growth phase cultured at low (realized value of 365 µatm pCO₂, n = 5) and high (realized value of 915 µatm pCO₂, n = 3) CO₂ treatments used as copepod food source. B) Change in the fatty acid composition in T. pseudonana after a shift from high to low pCO₂ conditions (n = 1 per treatment level). Time 0 are measured values before the culture media shift. Error bars indicate standard errors.