Table 1. Table of the 4 taxonomic models tested with ΔAIC values as well as a null model.
| Random effect added | ΔAICa | Log-Likelihood | K |
|---|---|---|---|
| Family/Genus/Species | 0 | -644.83 | 6 |
| Order/Family/Genus/Species | 2.0 | -644.83 | 7 |
| Genus/Species | 2.1 | -646.90 | 5 |
| Species | 4.4 | -649.07 | 4 |
| Null model | 297.7 | -796.69 | 3 |
Null Model is the negative binomial regression of Collisions as a function of Abundance. All other models add a random effect to the null model with / used to indicate nested random effects. The top model based on ΔAIC is the model with Family/Genus/Species as the random effect. K represents the number of parameters in each model.
aΔAIC calculated based on minimum AIC value amongst all models. Minimum AIC value was 1301.7 for the model with Family/Genus/Species as a random effect.