Table 4.
Log-likelihood ratio test results for assessing a seagrass treatment effect (presence/absence) and a treatment*month interaction effect on benthic CH4 and N2O fluxes; rows relate the null model, reduced model, and full model for CH4 and N2O, respectively.
| Dfa | logLik | deviance | χ2 | Dfb | Pr(>χ2) | |
|---|---|---|---|---|---|---|
| CH4^(0.133) ~ 1 + (1|ID) | 3 | −9.25 | 18.50 | |||
| CH4^(0.133) ~ Treat + (1|ID) | 4 | −2.71 | 5.41 | 13.08 | 1 | 2.98E-04 |
| CH4^(0.133) ~ Treat + Treat*Month + (1|ID) | 14 | 15.51 | −31.02 | 36.44 | 10 | 7.08E-05 |
| N2O^(0.133) ~ 1 + (1|ID) | 3 | 9.70 | −19.39 | |||
| N2O^(0.133) ~ Treat + (1|ID) | 4 | 13.92 | −27.84 | 8.45 | 1 | 3.65E-03 |
| N2O^(0.133) ~ Treat + Treat*Month + (1|ID) | 14 | 31.83 | −63.65 | 35.81 | 10 | 9.09E-05 |
aMixed effects model degrees of freedom determined by lmer function (see Bates et al.78)
bLikelihood ratio test degrees of freedom (the difference between models used in each comparison).