Table 2.
Ranking of model performance of state-dependent speciation and extinction “secsse” models for the three major groups of amphibians
| Diversification rate model | Rate categories | lnL | AIC | ΔAIC | AICw |
|---|---|---|---|---|---|
| Anura | |||||
| Reproductive-mode Independent | 2 | −14,598.183 | 29,218.365 | 0.000 | 0.852 |
| Reproductive-mode Dependent | 2 | −14,577.932 | 29,221.865 | 3.500 | 0.148 |
| Constant | 1 | −14,802.135 | 29,620.269 | 401.904 | 0.000 |
| Reproductive-mode Dependent | 1 | −14,796.597 | 29,625.193 | 406.828 | 0.000 |
| Caudata | |||||
| Reproductive-mode Dependent | 2 | −2092.489 | 4254.979 | 0.000 | 1.000 |
| Reproductive-mode Independent | 2 | −2124.984 | 4273.968 | 18.989 | 0.000 |
| Reproductive-mode Dependent | 1 | −2134.717 | 4303.434 | 48.455 | 0.000 |
| Constant | 1 | −2180.131 | 4378.262 | 123.283 | 0.000 |
| Gymnophiona | |||||
| Constant | 1 | −333.016 | 678.033 | 0.000 | 0.900 |
| Reproductive-mode Dependent | 1 | −331.907 | 683.815 | 5.782 | 0.050 |
| Reproductive-mode Independent | 2 | −332.909 | 683.818 | 5.785 | 0.050 |
| Reproductive-mode Dependent | 2 | −328.233 | 698.466 | 20.433 | 0.000 |
Models fall into three categories: Constant diversification (CD), Reproductive-mode Dependent Diversification (RmDD; state-associated rate shifts, with or without hidden traits), Reproductive mode Independent Diversification (RmID; rate shifts only associated with states of hidden traits, not observed reproductive modes). RmDD models can have different numbers of hidden traits, resulting in different numbers of rate categories.
lnL log likelihood, AIC Akaike information criterion, ΔAIC difference between AIC of each model and the best-fit model, AICw Akaike weights.