Figure 5
From: Coralline algal physiology is more adversely affected by elevated temperature than reduced pH
Coralline responses to experimental treatments.
(a) Gross photosynthesis, Pmax; (b) post-illumination respiration, RL; (c) maximum calcification rate, Gmax; and (d) photosynthesis to respiration ratio, Pmax:RL. White bars indicate rhodoliths, grey bars indicate articulated alga and black bars indicate CCA. Asterisks and letters denote significant differences relative to control organisms (Tukey HSD, P > 0.05). The bars in (a–c) represent the average ± SEM (n = 4–8 per treatment) relative change with respect to the control. The bars in (d) represent final absolute values. Negative values for the relative changes in algal calcification express the induction of decalcification activity quantified as increases in total alkalinity.
