Figure 4.
Δ13C isotope ratios (tissue δ13C corrected for source dissolved inorganic carbon δ13C) of juvenile Ecklonia radiata after 21 days grown under: (a) ambient pH conditions (fluctuating pHNBS [8.4 during the day, 7.8 at night], constant pHNBS at 8.4, 8.1 and 7.8); and (b) OA conditions (the same treatments as in (a) but with pHNBS reduced by 0.3 units in each treatment). Data are displayed as means ± standard error, n = 3–6. Bars within panels sharing a letter are not significantly different, as revealed by Tukey’s Honestly Significant Difference tests (α = 0.05).