Ecological Archives E094-152-A3
Alexander T. Wolf, Maggy M. Nugues. 2013. Synergistic effects of algal overgrowth and corallivory on Caribbean reef-building corals. Ecology 94:1667–1674. http://dx.doi.org/10.1890/12-0680.1
Appendix C. Statistical output tables for the laboratory experiment.
Table C1. ANOVA of the fixed effects of algae and corallivores on coral mortality and bleaching (nested three-Way ANOVA).
Hermodice carunculata Coralliophila abbreviata Source df Mean square F ratio P Mean square F ratio PCoral mortality
Algae
1
2.79
19.34
< 0.001
1.76
13.99
< 0.001
Corallivore
1
0.71
4.90
0.027
0.01
0.04
0.836
Algae × Corallivore
1
0.71
4.90
0.027
0.02
0.18
0.673
Residuals
42
Coral bleaching
Algae
1
7.27
44.29
< 0.001
9.88
77.68
< 0.001
Corallivore
1
0.17
1.05
0.305
0.00
0.03
0.865
Algae × Corallivore
1
0.21
1.27
0.259
0.04
0.34
0.558
Residuals
42
Plot was included as random factor and the tank sections (n = 8) were nested within plot. One degree of freedom was allocated to the factor plot, and one degree of freedom was allocated to the nested factor.
Table C2. ANOVA of the fixed effect of Hermodice carunculata on coral mortality in the presence of algae (nested two-Way ANOVA). This analysis was performed to explore the significant interaction between algae and corallivores on coral mortality shown above.
Source
df
Mean-square
F ratio
P
Corallivore
1
1.41
4.97
0.026
Residuals
20
Plot was included as random factor and the tank sections (n = 8) were nested within plot. One degree of freedom was allocated to the factor plot, and one degree of freedom was allocated to the nested factor.