Table 4. Ranked relative importance of variables associated with richness of herbaceous and woody understory showing model estimates of slope and variance.
| Richness of herbaceous perennials | ||||||||
| 2012 | 2013 | |||||||
| Explanatory variable | Σw i | Model-average estimate | Unconditional SE | Explanatory variable | Σw i | Model-average estimate | Unconditional SE | |
| Nutrients | 0.71 | 0.416 | 0.183 | Tree mortality | 1.00 | 0.745 | 0.184 | |
| Soil moisture | 0.14 | 0.202 | 0.189 | Soil moisture | 1.00 | 0.348 | 0.187 | |
| Light | 0.11 | 0.162 | 0.188 | Nutrients | 1.00 | 0.714 | 0.183 | |
| Tree mortality | 0.10 | 0.201 | 0.188 | Light | 0.01 | 0.175 | 0.201 | |
| Richness of woody perennials | ||||||||
| 2012 | 2013 | |||||||
| Explanatory variable | Σw i | Model-average estimate | Unconditional SE | Explanatory variable | Σw i | Model-average estimate | Unconditional SE | |
| Tree mortality | 0.25 | -0.082 | 0.154 | Soil moisture | 0.49 | 0.090 | 0.131 | |
| Soil moisture | 0.25 | 0.030 | 0.078 | Tree mortality | 0.43 | -0.162 | 0.204 | |
| Light | 0.09 | 0.010 | 0.046 | Light | 0.07 | 0.007 | 0.043 | |
| Nutrients | 0.07 | -0.005 | 0.036 | Nutrients | 0.06 | 0.001 | 0.031 | |
The most likely explanatory variables are shown in bold (based on model-average estimate being different from zero when the confidence interval excludes zero).