Table 1. Parameter estimates for four multiple regressions of introduced functional guild cover against resource levels.
| Source of variation | df | Log introduced forb cover | Log introduced C3 cover | Log introduced C4 cover | Log introduced legume cover |
|---|---|---|---|---|---|
| Soil nitrate | 1 | 1.75*** | 0.711** | 0.319† | 0.233 |
| Initial bare ground | 1 | 0.00779*** | 0.00148† | 0.00227*** | 0.00151 |
| Light | 1 | 0.091 | -0.227* | 0.213** | 0.258 |
| Soil H2O | 1 | -0.00523 | 0.0367 | -0.0455 | 0.1206 |
| Overall r2 | 0.47 | 0.12 | 0.22 | 0.04 | |
| Overall P | <0.0001 | <0.0008 | <0.0001 | 0.186 |
Bare ground was measured in 1997, and other variables were measured in 1999. Variance inflation factors for response variables are <1.5, indicating that they are not appreciably collinear. †, P < 0.1; *, P < 0.05; **, P < 0.01; ***, P < 0.001.