Table 2.
Test statistics for distance-based linear model (DISTLM) analyses marginal and sequential tests based on ‘Forward’ procedure and AIC criteria of V. mediterranei G1 phenotypes abundance at the 11 sampling dates
| Variable | AIC | SS (trace) | Pseudo-F | P | Prop. | Cumul. | Res.df |
|---|---|---|---|---|---|---|---|
| Marginal tests | |||||||
| Phosphate | – | 11291.0 | 11.953 | 0.002 | 0.3741 | – | – |
| Conductivity | – | 9146.6 | 8.696 | 0.002 | 0.3030 | – | – |
| TDN | – | 2788.2 | 2.035 | 0.137 | 0.0924 | – | – |
| Nitrite | – | 4424.8 | 3.435 | 0.039 | 0.1466 | – | – |
| Phaeo a | – | 8055.3 | 7.280 | 0.006 | 0.2669 | – | – |
| Turbidity | – | 1490.9 | 1.039 | 0.322 | 0.0494 | – | – |
| Ammonia | – | 2821.9 | 2.062 | 0.138 | 0.0935 | – | – |
| Sequential tests | |||||||
| +Phosphate | 152.62 | 11291.0 | 11.953 | 0.001 | 0.3741 | 0.3741 | 20 |
| +Conductivity | 148.16 | 4810.1 | 6.490 | 0.008 | 0.1594 | 0.5335 | 19 |
| +TDN | 145.80 | 2530.8 | 3.944 | 0.014 | 0.0838 | 0.6173 | 18 |
| +Nitrite | 143.97 | 1846.0 | 3.234 | 0.057 | 0.0612 | 0.6785 | 17 |
| +Phaeo a | 141.94 | 1624.1 | 3.216 | 0.052 | 0.0538 | 0.7323 | 16 |
| +Turbidity | 138.66 | 1723.3 | 4.066 | 0.031 | 0.0571 | 0.7894 | 15 |
| +Ammonia | 135.41 | 1350.8 | 3.777 | 0.032 | 0.0448 | 0.8341 | 14 |
Marginal tests show how much variation each variable explains when considered alone, ignoring other variables. Sequential tests explain the cumulative variation attributed to each variable fitted to the model in the order specified, taking previous variables into account
TDN total dissolved nitrogen