Table 3. Summary of generalized linear models (GLM) showing the effect of environmental variables (decay stage and tree species) on saproxylic Diptera abundance in decaying logs in southern Quebec.

Formula	AIC	Residual degrees of freedom	Residual deviance	Deviance
abun ∼ decay	1216.6	18	1,082	1267.5
abun ∼ tree	1402.1	18	1267.5	1267.5
abun ∼ decay * tree	1124.1	16	985.5	1267.5
abun ∼ decay + tree	1218.6	17	1,082	1267.5

Note:

Value in bold highlights the best fit model.