Table 2. Statistical analyses of differences in physiological parameters between treatments within each experimental period (winter cold stress and summer warm period) for each species.
Results were obtained from linear mixed models where model residuals were normally distributed with equal variance between groups (fixed factor = treatment, random factor = genotype).
| Parameter | Acropora eurystoma | Stylophora pistillata | ||||||
|---|---|---|---|---|---|---|---|---|
| Winter cold stress | Summer heat shock | Winter cold stress | Summer heat shock | |||||
| FV/ FM | m: 0.527 c: 0.527 | F: 9.470 p: <0.0016 | m: 0.188 c: 0.188 | F: 1.971 p: >0.05 | m: 0.382 c: 0.463 | F: 6.046 p: <0.02 | m: 0.014 c: 0.069 | F: 0.167 †p: >0.05 |
| rETRmax | m: 0.781 c: 0.846 | F: 39.435 p: <0.0001 | m: 0.676 c: 0.676 | F: 17.701 p: <0.0001 | m: 0.667 c: 0.820 | F: 31.456 p: <0.0001 | m: 0.050 c: 0.638 | F: 1.700 p: >0.05 |
| I k | m: 0.828 c: 0.828 | F: 40.955 †p: <0.001 | m: 0.214 c: 0.214 | F: 2.309 †p: >0.05 | m: 0.674 c: 0.918 | F: 693509 p: <0.0001 | m: 0.337 c: 0.647 | F: 8.101 p: <0.01 |
| Alpha | m: 0.759 c: 0.759 | F: 26.733 p: <0.0001 | m: 0.081 c: 0.354 | F: 1.150 p: >0.05 | m: 0.351 c: 0.351 | F: 4.594 p: <0.05 | m: 0.789 c: 0.800 | F: 33.437 p: <0.0001 |
| Chlorophyll / cm2 | m: 0.256 c: 0.256 | F: 4.136 p: <0.05 | m: 0.144 c: 0.358 | F: 1.908 p: >0.05 | m: 0.388 c: 0.388 | F: 5.077 p: <0.02 | m: 0.169 c: 0.169 | F: 61.789 p: >0.05 |
| Symbionts / cm2 | m: 0.097 c: 0.316 | F: 2.140 p: >0.05 | m: 0.484 c: 0.484 | F: 7.976 p: <0.001 | m: 0.320 c: 0.320 | F: 95.746 †p: <0.004 | m: 0.042 c: 0.260 | F: 0.485 p: >0.05 |
| Protein / cm2 | m: 0.188 c: 0.253 | F: 9.470 p: >0.05 | m: 0.081 c: 0.085 | F: 0.750 p: >0.05 | m: 0.231 c: 0.231 | F: 2.258 p: >0.05 | m: 0.087 c: 0.087 | F: 0.806 p: >0.05 |
| Respiration rate / cm2 | m: 0.162 c: 0.162 | F: 9.470 p: >0.053 | m: 0.041 c: 0.263 | F: 0.467 p: >0.05 | m: 0.162 c: 0.162 | F: 1.680 †p: >0.05 | m: 0.118 c: 0.300 | F: 1.427 †p: >0.05 |
| Photosyn thesis. rate/ cm2 | m: 0.588 c: 0.600 | F: 9.470 †p: <0.002 | m: 0.206 c: 0.519 | F: 3.640 p: >0.05 | m: 0.832 c: 0.832 | F: 39.723 p: <0.0001 | m: 0.260 c: 0.364 | F: 3.469 †p: >0.05 |
Notes.
Where data did not meet assumptions of parametric tests, permanova models were performed as indicated by †.
Bold p values indicate statistical significance (α = 0.05). ’m’: Marginal R2 value, the proportion of variance explained by fixed factors alone. ’c’: Conditional R2 value, the proportion of variance explained by both fixed and random factors combined.