Table 2. Summary table of chemical conditions.

Mean ± SE for daytime measurements in the communities and community components. P-values indicate significance of difference between the coral-only run and mixed-community run.

	pH	Temp (°C)	Ca2+ (mmol kg−1)	TA (μmol kg−1)	DIC (μmol kg−1)	HCO3 (μmol kg−1)	CO${}_{\mathbf{3}}^{\mathbf{2-}}$ (μmol kg−1)	CO2 (μmol kg−1)	Ω arag	n	Gnet mmol m−2 d−1
Coral	7.5 ± 0.07	23.8 ± 0.3	9.75 ± 0.0	1765 ± 6	1766 ± 60	1651 ± 59	72 ± 9	42 ± 6.2	1.12 ± 0.14	20	310
Mixed	7.9 ± 0.04	23.8 ± 0.3	10.05 ± 0.0	2015 ± 76	1802 ± 60	1622 ± 60	159 ± 12	20.5 ± 7.3	2.51 ± 0.20	14	210
p-value	3 × 10−5**	0.97	0.005*	0.023*	0.073	0.74	6 × 10−6 **	0.03*	2 × 10−6 **	-	-
Sediment	8.00 ± 0.02	24 ± 0.56	11.5 ± 0.21	2185 ± 17	1793 ± 31	1609 ± 31	172 ± 9.8	11.4 ± 0.78	2.73 ± 0.14	7	6.4
Algae	8.56 ± 0.13	23.5 ± 0.39	10.67 ± 0.0	2126 ± 56	1402 ± 139	1028 ± 181	370 ± 41	3.39 ± 1.8	5.89 ± 0.68	6	22.9
Plankton	8.05 ± 0.03	24.5 ± 0.54	10.4 ± 0.03	2153 ± 69	1933 ± 88	1707 ± 75	215 ± 28	10.45 ± 0.46	3.4 ± 0.43	4	2.8

^*significant at 0.05 level.

^**significant at 0.001 level.