Table 1.
Results of ANCOVA for effects of experimental erosion, rhizome severing and measuring date on ramet number, leaf number and biomass of P. villosa per plot
| Ramet number |
Leaf number |
Biomass |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Source | d.f. | F | P | d.f. | F | P | d.f. | F | P |
| Co1 | 1 | 27·32 | <0·001 | – | – | – | 1 | 2·85 | 0·095 |
| Co2 | – | – | – | 1 | 71·59 | <0·001 | 1 | 14·43 | <0·001 |
| Erosion (E) | 4 | 12·15 | <0·001 | 4 | 19·65 | <0·001 | 4 | 20·36 | <0·001 |
| Severing (S) | 1 | 7·59 | 0·007 | 1 | 10·43 | 0·002 | 1 | 10·80 | 0·002 |
| E × S | 4 | 0·25 | 0·908 | 4 | 0·33 | 0·858 | 4 | 1·69 | 0·159 |
| Error | 89 | 89 | 88 | ||||||
| Date (D) | 12 | 1·05 | 0·368 | 12 | 1·51 | 0·214 | |||
| D × Co1 or Co2 | 12 | 0·37 | 0·769 | 12 | 1·48 | 0·224 | |||
| D × E | 48 | 5·33 | <0·001 | 48 | 14·00 | <0·001 | |||
| D × S | 12 | 0·59 | 0·619 | 12 | 0·94 | 0·414 | |||
| D × E × S | 48 | 1·47 | 0·139 | 48 | 0·80 | 0·640 | |||
| Error (D) | 1068 | 1068 | |||||||
F, P and d.f. for ramet number and leaf number are based on three-way repeated measures ANCOVA, and for biomass based on two-way ANCOVA. Covariates 1 (Co1) and 2 (Co2) are ramet number and leaf number per plot measured at the start of the experiment.