Appendix A. Nested MANOVA on the effect of seascape (+ vs. – subtidal reefs), site (nested in seascape) and shore height on percent cover of mussels on the rock surface. Dependent variables were the percent cover of the three size classes: large/adult (>15 mm) mussels, juveniles/sub-adults (5–15 mm), and new recruits (< 5 mm), and the separated ANOVA on the cover of the patches of the different size classes. Significant P values are in bold.
MANOVA (Wilks test) |
Error |
||||
Source of Variation |
df |
Value |
F |
df |
P |
Seascape |
3 |
0.32 |
212.9 |
301.0 |
<0.0001 |
Site(seascape) |
18 |
0.41 |
17.7 |
851.8 |
<0.0001 |
Shore Height |
3 |
0.69 |
45.6 |
301.0 |
<0.0001 |
Seascape × Shore Height |
3 |
0.94 |
6.4 |
301.0 |
0.0003 |
Site(seascape) × Shore Height |
18 |
0.65 |
7.9 |
851.8 |
<0.0001 |
ANOVA |
|||||
SS |
df |
MS |
F |
P |
|
> 15 mm mussels |
|||||
Seascape |
31.30 |
1 |
31.30 |
13.27 |
0.0108 |
Site(Seascape) |
14.16 |
6 |
2.36 |
2.39 |
0.1561 |
Shore Height |
5.24 |
1 |
5.24 |
5.32 |
0.0605 |
Seascape × Shore Height |
0.39 |
1 |
0.39 |
0.39 |
0.5542 |
Site(Seascape) × Shore Height |
5.91 |
6 |
0.99 |
9.08 |
<0.0001 |
Error |
33.00 |
303 |
0.11 |
||
5-15 mm mussels |
|||||
Seascape |
2.68 |
1 |
2.68 |
9.05 |
0.0237 |
Site(Seascape) |
1.77 |
6 |
0.30 |
0.86 |
0.5715 |
Shore Height |
2.90 |
1 |
2.90 |
8.41 |
0.0273 |
Seascape × Shore Height |
0.35 |
1 |
0.35 |
1.01 |
0.3534 |
Site(Seascape) × Shore Height |
2.07 |
6 |
0.34 |
14.43 |
<0.0001 |
Error |
7.24 |
303 |
0.02 |
||
< 5 mm mussels |
|||||
Seascape |
0.10 |
1 |
0.10 |
0.73 |
0.4255 |
Site(Seascape) |
0.82 |
6 |
0.14 |
2.56 |
0.1390 |
Shore Height |
0.30 |
1 |
0.30 |
5.54 |
0.0567 |
Seascape × Shore Height |
0.00 |
1 |
0.00 |
0.08 |
0.7873 |
Site(Seascape) × Shore Height |
0.32 |
6 |
0.05 |
6.22 |
<0.0001 |
Error |
2.60 |
303 |
0.01 |