Table 1. Significance of the selected explanatory variables in the RDA correlation triplots (see Figure 5a and b).
| Explanatory variable | AIC* | Pseudo-F | P-values |
|---|---|---|---|
| Host populations (H1) | |||
| KT | 103.5 | 33 | 0.005 |
| Temperature | 95.4 | 10.4 | 0.005 |
| Latitude | 79.7 | 18.9 | 0.005 |
| N2 | 71.1 | 10.6 | 0.005 |
| Virus populations (H2) | |||
| Bacteria | 89.5 | 135.0 | 0.005 |
| PicoEUK | 71.7 | 21.4 | 0.005 |
| NanoEUK | 64.8 | 8.9 | 0.005 |
| Temperature | 58.5 | 8.3 | 0.005 |
| Cyano | 54.1 | 6.1 | 0.005 |
| Latitude | 52.9 | 3.1 | 0.025 |
Abbreviations: AIC, Akaike Information Criterion; NanoEUK, nanoeukaryotic; PicoEUK, picoeukaryotic; RDA, redundancy analysis.
The explanatory variables were selected by forward selection based on the pseudo-F statistic, using 9999 permutations to assess their significance. Total variation explained by the RDA models was 57% and 75%, respectively.