Predicted Db levels from the minimal adequate regression model for each combination of species (Hd, Hediste diversicolor; Hu, Hydrobia ulvae; Cv, Corophium volutator) at three atmospheric CO2 concentrations (380 ppm (solid line), 600 ppm (dashed line) and 1000 ppm (dotted line)) and the three temperatures (a) 6°C, (b) 12°C and (c) 18°C.