Measured combined log response ratio as a function of the expected additive log response ratio. Data are log response ratios (lnRRT+CO2 with 95% confidence intervals) for resting oxygen uptake (; A and B) and absolute aerobic scope (AAS; C and D) of both non-adult (orange) and adult (purple) life stages in calcifying invertebrates (A and C) and fish (B and D). Different symbols indicate different taxonomic groups (upright triangle, gastropod; inverted triangle, crustacean; circled cross, cephalopod; hexagon, bivalve; diamond, echinoderm; cross, cnidarians; circle, teleost; and square, elasmobranch). Note that the invertebrate species are all calcifying because there were no comparable data available for non-calcifying species. The continous lines are fitted by linear regression, and the dotted lines represent the 95% confidence interval. The dashed 1/1 line is where the measured lnRRT+CO2 equals the expected additive lnRR.
