Table 1. Summary of gas phase DMS (ppm) in the outflow of experimental flasks, and surface area and zooxanthellae cell density –normalised DMS concentrations. amol = 1 × 10⁻¹⁸ moles) Values represent mean (±total error) for each experimental stage (Stage I submersion, Stage II air exposure, Stage III re-submersion).

	Stage I Submersion	Stage II Air exposure	Stage III Re-submersion
DMSgas ppm
Acropora cf. horrida 400	0.1 ± 0.3	1.5 ± 1.1	0.1 ± 0.1
Porites cylindrica 400	0.04 ± 0.03	0.5 ± 0.1	0.02 ± 0.02
Seriatopora hystrix 100	0.3 ± 0.3	0.7 ± 0.1	0.1 ± 0.1
DMS pmol/cm2
Acropora cf. horrida 400	53.7 ± 95.3	580.2 ± 456.6	30.5 ± 23.0
Porites cylindrica 400	1.3 ± 0.4	31.0 ± 8.8	1.9 ± 0.5
Seriatopora hystrix 100	7.3 ± 1.7	62.2 ± 18.1	17.4 ± 5.1
DMS amol/cell
Acropora cf. horrida 400	24.2 ± 2.5	261.9 ± 21.1	10.2 ± 3.5
Porites cylindrica 400	0.6 ± 0.02	14.2 ± 0.4	1.3 ± 0.04
Seriatopora hystrix 100	1.0 ± 0.01	8.5 ± 0.01	5.3 ± 0.01