Fig 2 -

Standardised photosynthetic efficiency (Fv/Fm) of Corallina/Arthrocardia “robust”, Corallina complex 1, Corallina complex 2 and Phymatolithopsis complex during the impact (a) and the recovery (b) phase in the different treatments. Points show individual values. Solid line indicates the median, box shows the interquartile range (IQR) and the whiskers are 1.5×IQR. Colours indicate treatments (dark-grey = ambient [16°C]; light-grey = amb.+MHW [16°C+2.7°C at t5], coral = future [18.7°C], dark-red = fut.+MHW [18.7°C+2.7°C at t5]). “Pre”, “imp” and “rec” denotes the three experimental phases (pre-impact, impact and recovery). Note: standardisation was achieved by subtraction of the respective Fv/Fm values from the pre-impact phase. Thus, 0 = no change, <0 = lower efficiency and >0 = higher efficiency.