Table 5 Results of the marginal test for DISTLM analysis, using the BEST procedure for the Bray-Curtis resemblance matrix based on abundance (a) and biomass (b). Data were standardized and then fourth-root transformed. P(perm) < 0.05 values are in bold. BIC = Bayesian Information Criterion. SS = Sum of Squares. For the DISTLM analysis we used all the data described in Table 3. In what follows we only present the first 10 best environmental variables according to BIC criteria. Res. d.f. = 45 (Abundance and Biomass analysis)
Variable | SS | Pseudo-F | P | BIC |
|---|---|---|---|---|
a) Abundance | ||||
 Mean Grain Size (mm) | 5944.1 | 2.655 | 0.003 | 368.20 |
 Sorting (mm) | 5779.5 | 2.577 | 0.004 | 368.27 |
 Surface pH | 5393.8 | 2.396 | 0.006 | 368.45 |
 Seafloor pH | 4727.1 | 2.086 | 0.016 | 368.76 |
 % Gravel | 4726.3 | 2.086 | 0.016 | 368.76 |
 TOM (%) | 4654.6 | 2.053 | 0.016 | 368.80 |
 % Mud | 4332.8 | 1.905 | 0.027 | 368.94 |
 Seafloor temperature (°C) | 4312.6 | 1.896 | 0.030 | 368.95 |
 Depth (m) | 4155.9 | 1.824 | 0.032 | 369.03 |
 Surface temperature (°C) | 3920.7 | 1.717 | 0.053 | 369.13 |
b) Biomass | ||||
 Mean Grain Size (mm) | 7008.4 | 2.529 | 0.002 | 378.23 |
 Sorting (mm) | 6705.8 | 2.414 | 0.002 | 378.34 |
 TOM (%) | 6413.2 | 2.303 | 0.003 | 378.45 |
 Surface pH | 6002.4 | 2.149 | 0.006 | 378.61 |
 % Gravel | 5667.3 | 2.023 | 0.010 | 378.73 |
 Seafloor temperature (°C) | 5522.6 | 1.969 | 0.012 | 378.79 |
 % Mud | 5514.1 | 1.966 | 0.013 | 378.79 |
 Seafloor pH | 5498 | 1.960 | 0.013 | 378.80 |
 Depth (m) | 4496.5 | 1.591 | 0.055 | 379.17 |
 Surface temperature (°C) | 4410.8 | 1.559 | 0.061 | 379.20 |