TABLE E1. Analysis of predator diversity and density effects. Two-way ANOVA of effects of crab diversity and density on overall consumption rate and targeted asymmetrical contrasts of the effect of the average monoculture vs. the polyculture for data pooled across density levels and separately for low and high density.
Source |
SS |
df |
MS |
F |
P |
Density |
0.0328 |
1 |
0.0328 |
1.48 |
0.23 |
Diversity |
0.2223 |
3 |
0.074 |
3.33 |
0.03 |
Monocultures alone |
0.0026 |
2 |
0.0013 |
0.08 |
0.92 |
Average monoculture vs. polyculture |
0.2198 |
1 |
0.2198 |
9.88 |
0.003 |
Density × diversity |
0.0164 |
3 |
0.0055 |
0.25 |
0.86 |
Residual |
0.8895 |
40 |
0.0222 |
|
|
|
|
|
|
|
|
Low density |
|
|
|
|
|
Diversity |
0.0592 |
3 |
0.0197 |
0.71 |
0.56 |
Monocultures alone |
0.0003 |
2 |
0.0002 |
0.01 |
0.99 |
Average monoculture vs. polyculture |
0.0589 |
1 |
0.0589 |
2.11 |
0.16 |
Residual |
0.5585 |
20 |
0.0279 |
|
|
|
|
|
|
|
|
High density |
|
|
|
|
|
Diversity |
0.1796 |
3 |
0.0599 |
3.62 |
0.03 |
Monocultures alone |
0.0029 |
2 |
0.0014 |
0.12 |
0.88 |
Average monoculture vs. polyculture |
0.1767 |
1 |
0.1767 |
10.64 |
0.004 |
Residual |
0.3311 |
20 |
0.166 |
|
|