Table 1. Photosynthetic performance of Symbiodinium under defined broadband spectra simulating in situ coral tissue and halogen lamp spectral composition.

	PG		rETR		ETR
	Tissue	Lamp	Tissue	Lamp	Tissue	Lamp
Pmax or ETRmax	13.49 (±3.11)	11.96 (±1.21)	109.3 (±7.5)	126.6 (±7.9)	47.5 (±3.3)	41.0 (±2.6)
α	0.09 (±0.02)	0.07 (±0.01)	0.81 (±0.01)	0.80 (±0.01)	0.35 (±0.01)*	0.26 (±0.003)*
Ek	156.4 (±29.4)	170.7 (±14.3)	135.9 (±10.9)	157.9 (±9.4)	135.9 (±10.9)	157.9 (±9.4)

The photosynthetic parameters P_max (in O₂ h⁻¹ 10⁷ cells⁻¹) or ETR_max, α, and E_k (in µmol photons m⁻² s⁻¹) were derived from O₂ evolution based (P_G) and Chl a fluoremetry-based (rETR and ETR) photosynthesis irradiance curves. A significant difference (p<0.05) between coral tissue and halogen lamp is denoted with an asterisk. Means (± SE) are shown (n = 3).