Table 1.
MANOVA results testing the effects of contemporary drought environment, plant evolutionary history and microbe history on (a) fungal and bacterial abundance and richness and fungal : bacterial ratio, (b) nitrate and ammonium concentrations and (c) per cent carbon, per cent nitrogen and carbon : nitrogen ratio. (Non-significant interactions (p > 0.25) were removed from the model; in (c), the model retained significant two-way interactions, because the three-way interaction was part of the model.)
| effect | (a) microbial community |
(b) nitrogen availability |
(c) %C, %N, C : N |
|||
|---|---|---|---|---|---|---|
| F1,26 | p | F1,25 | p | F1,22 | p | |
| contemporary drought | <0.000 | 0.987 | 90.0 | <0.001 | 1.15 | 0.296 |
| plant evolutionary history | 1.47 | 0.236 | 2.84 | 0.105 | 3.59 | 0.071 |
| microbe history | — | — | 11.1 | 0.003 | 3.22 | 0.086 |
| contemporary × evolution | 4.25 | 0.049 | — | — | 0.817 | 0.376 |
| contemporary × microbe | — | — | — | — | 0.488 | 0.492 |
| evolution × microbe | — | — | — | — | 0.071 | 0.793 |
| contemporary × evo × microbe | — | — | — | — | 2.09 | 0.162 |