. 2021 Jul 27;9:e11663. doi: 10.7717/peerj.11663

Table 2. Linear mixed-effects model results for gross and net photosynthesis, respiration rates (mg O₂ m⁻² h⁻¹), and the P:R ratio of X. Umbellata corals under simulated warming and continuous DOC addition.

Type III analysis of variance with Satterthwaite’s approximation method for degrees of freedom.

Factor		Gross photosynthesis		Respiration		Net photosynthesis		P:R ratio
Fixed effects	df	F	p	F	p	F	p	F	p
DOC	4	0.855	0.515	0.772	0.563	1.505	0.206	2.440	0.0512.
Temperature	3	33.13	6.3e⁻¹⁵*******	17.90	2.35e⁻⁰⁹*******	36.87	<2e⁻¹⁶*******	11.06	2.16e⁻⁰⁶*******
Time	7	1.902	0.0774.	4.701	0.00014 ***	1.562	0.155	1.585	0.147
DOC × Temp.	12	0.551	0.876	0.947	0.504	0.705	0.743	0.924	0.526
DOC × Time	24	0.553	0.951	0.760	0.776	0.622	0.909	1.487	0.087

Notes.

P-values defined as significant at a threshold of P < 0.05 are highlighted in bold.

Table 2. Linear mixed-effects model results for gross and net photosynthesis, respiration rates (mg O2 m−2 h−1), and the P:R ratio of X. Umbellata corals under simulated warming and continuous DOC addition.