Figure_S3

Interpreting spectral density profiles For trees simulated under a constant birth-death model (open circle), the principal λ for the MGL is a good predictor of species richness (a) and phylogenetic diversity (b); there is a significant positive relationship between skewness and the γ statistic (c) and no significant relationship between kurtosis and the Colless index (d). The principal λ for the nMGL shows no significant relationship with species richness (a, inset) and a significantly negative relationship with phylogenetic diversity (b, inset). Only significant slopes are shown.