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. 2014 Jul;114(1):17–33. doi: 10.1093/aob/mcu085

Fig. 4.

Fig. 4.

Mean net photosynthesis (± s.d. of four replicates) of small (0·18 g FM), medium (0·84 g FM) and large (2·71 g FM) spherical colonies of N. pruniforme as a function of external DIC concentration (>95 % HCO3–). The apparent half-saturation constant for small, medium and large colonies was 0·78, 0·78 and 1·24 mm HCO3–, the initial linear slope of net photosynthesis at low limiting DIC concentration was 319, 305 and 197 nmol O2 cm–2 h–1 (1 mmol DIC L–1)–1 and photosynthesis extrapolated to zero DIC was 55, 72 and 164 nmol O2 cm–2 h–1. From Raun (2006).