Table 1.
Model outputs for pGLS regressions incorporating intraspecific variation for both Simpson and Shannon diversity indices calculated at two taxonomic levels for diet (F: Family-level, O: Order-level). A likelihood-ratio test (LRT) was performed between a pGLS model with the regression coefficient estimated (pGLS) and one with the coefficient fixed to 0 (i.e., assuming there is no effect of diet; pGLS (intercept only)). Estimated parameters are given for the full model. Index = version of the index and taxonomic level of diet used for each model; logLik = log-likelihood for each model; LR = likelihood-ratio; p = p-value for the LRT.
| pGLS | pGLS (Intercept Only) | LRT | ||||
|---|---|---|---|---|---|---|
| Index | logLik | Coefficient | Intercept | logLik | LR | p |
| Simpson (F) | −28.866 | 0.137 | 0.035 | −50.580 | 43.427 | 4.402 × 10−11 |
| Shannon (F) | −176.937 | −0.183 | 2.748 | −227.735 | 101.596 | <2.2 × 10−16 |
| Simpson (O) | −24.361 | 0.124 | 0.045 | −27.905 | 7.087 | 0.008 |
| Shannon (O) | −228.205 | −0.186 | 2.736 | −199.282 | 57.847 | 2.831 × 10−14 |