FIGURE 1.

Temporal trajectories of four metrics of diversity and phylogenetic structure over the course of diversification in four distinct scenarios. (A) Pure niche conservatism, (B) energy gradient, (C) speciation gradient, and (D) disturbance gradient. Metrics include Pearson’s correlation coefficient between latitude and richness, Pearson’s correlation coefficient between the time a clade has occupied a region and richness, the slope of the relationship between mean root distance (MRD) and richness, scaled by maximum possible root distance of the phylogeny, and β, a metric of tree imbalance. Simulations of tropical origin in red, and simulations of temperate origin in blue.