Table 1.
Results of PERMANOVA assessing the effects of farming system (system), sampling date (time), rain manipulation (drought) and two-way interactions including drought on (A) bacterial and (B) fungal community composition based on the amplicon-based sequencing data and Bray–Curtis dissimilarity matrix. Factor drought: control without shelter, rainout shelter control, rainout shelter; factor time: 4, 8 and 13 weeks after rainout shelter set-up; factor system: biodynamic farming system and conventional farming system with pure mineral fertilisation.
| Source of variation | Degrees of freedom | Sum of squares | r 2 | PseudoF-value | Pr (>F) |
|---|---|---|---|---|---|
| (A)Bacterial communities | |||||
| Drought | 2 | 0.095 | 0.020 | 1.000 | 0.362 |
| Time | 2 | 0.443 | 0.094 | 4.675 | 0.001 |
| System | 1 | 1.121 | 0.238 | 23.693 | 0.001 |
| Drought × system | 2 | 0.073 | 0.016 | 0.776 | 0.788 |
| Drought × time | 4 | 0.143 | 0.030 | 0.755 | 0.898 |
| Residuals | 60 | 2.840 | 0.602 | — | — |
| Total | 71 | 4.715 | 1.000 | — | — |
| (B) Fungal communities | |||||
| Drought | 2 | 0.265 | 0.026 | 1.073 | 0.311 |
| Time | 2 | 0.529 | 0.052 | 2.143 | 0.001 |
| System | 1 | 1.367 | 0.135 | 11.077 | 0.001 |
| Drought × system | 4 | 0.407 | 0.040 | 0.824 | 0.897 |
| Drought × time | 2 | 0.188 | 0.019 | 0.762 | 0.917 |
| Residuals | 60 | 7.405 | 0.729 | — | — |
| Total | 71 | 10.161 | 1.000 | — | — |