Figure 3

Isotopic measurements of seawater at the sampling sites.

δ¹³C_DIC (circles) and δ¹⁸O_seawater (squares) (‰) at sites 1 (control), 2 (intermediate pCO₂) and 3 (high pCO₂). Note that the mean pCO₂ (μatm; Table 1) is given in parentheses for each site. All values represent the mean ± SEM (n = 3).