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
P

Coral 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.


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