Appendix F (TABLE F1). Beta diversity values were estimated as the probability that the observed number of shared species in two samples differs from the null expectation of random community membership (Raup-Crick metric). Model included the main effects of Site (random), Rack (nested in Site; random), Taxa (shell, barnacle, upright structure; fixed effect), Structural Complexity (mimic or quadrat; fixed effect), and all interactions. Only significant effects (P < 0.05) are listed.
Region |
Source |
df |
MS |
Pseudo-F |
P(perm) |
Belize |
Site |
2 |
8057.2 |
1.49 |
0.0007 |
Rack (Site) |
9 |
5417.5 |
1.10 |
0.0001 |
|
Rack × Taxa |
18 |
5066.6 |
1.03 |
0.0001 |
|
Florida |
Site |
1 |
8804.2 |
1.73 |
0.030 |
Rack (Site) |
5 |
5110.4 |
1.04 |
0.007 |
|
Virginia |
Site |
2 |
6438 |
1.29 |
0.023 |
Connecticut |
Site |
2 |
6991.5 |
1.38 |
0.0001 |
Rack (Site) |
9 |
5113.7 |
1.04 |
0.0002 |