Figure 4.

(a) Respiration rates ±s.e. of Lophelia pertusa expressed as µmol O₂ g⁻¹ AFDM h⁻¹ for each treatment at three, six and 12 month time points. Asterisks (* and **) denote significant differences at that time point between and within treatments, respectively. The arrow indicates a decrease in pH across treatments. (b) Respiration and calcification rates ±s.e. for all treatments at three, six and 12-month time points. Linear regression lines are fitted for each time point between treatments. Nine degrees Celsius 1000 ppm treatment results are excluded due to dissolution of exposed aragonite.