Figure 1
From: Molecular evolutionary rates predict both extinction and speciation in temperate angiosperm lineages
Effects of the mean and among-branch variation in ITS substitution rate on speciation and extinction rates across temperate angiosperm clades. a,b: The mean rate of ITS substitution predicts speciation (log[lambda]) and extinction (ε2), suggesting that elevated background mutation rates facilitate both of these processes. c,d: The coefficient of variation in substitution rate does not predict either speciation or extinction, suggesting that a punctuated evolution model is inappropriate to describe the relationship between rates of molecular evolution and speciation.