Table 1.
Logistic regression testing for the probability of seedling survival in response to, [CO2] (ppm), mesh treatments, soil moisture regime, temperature regime, and PAR (µmol/m2/sec). Temperature was removed from the original model
| Logistic regression:c = 0.842 | Likelihood ratioP < 0.0001 | |||
|---|---|---|---|---|
| Effect | Odds ratios | df | Wald χ2 | P> χ2 |
| 800 ppm CO2 | 0.970516 | 1 | 5.7755 | 0.0163 |
| Ambient CO2 | 1.03038 | |||
| Xeric | 0.479438 | 2 | 103.6506 | <0.0001 |
| Mesic | 0.901919 | |||
| Hygric | 1.908867 | |||
| 0.5-µm mesh | 0.6 | 2 | 89.5458 | <0.0001 |
| 35-µm mesh | 0.791281 | |||
| No mesh | 1.891892 | |||
| 800 ppm ×xeric | 0.585091 | 2 | 5.9129 | 0.052 |
| 800 ppm ×mesic | 0.917258 | |||
| 800 ppm ×hygric | 1.447368 | |||
| Ambient ×xeric | 0.48221 | |||
| Ambient ×mesic | 0.921053 | |||
| Ambient ×hygric | 1.747814 | |||
| PAR | 0.983635 | 1 | 7.4978 | 0.0062 |