Plots of accumulation of relative ecological disparity through time (DTT).

<p>Plot summarizes all 29 Southeast Asian <i>Pomatorhinus</i> scimitar babblers (solid line) compared with mean disparity as simulated under 1000 replicates of an unconstrained model of Brownian Evolution (dashed line). Disparity plots start out in the left side or the graph (root of topology) at a value of 1 and end on the right (all extant taxa) at a value of 0. Disparity represents the mean of the square pairwise differences between all terminal taxa defined at each node (see Methods). The same four bioclimatic variables as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0055629#pone-0055629-g006" target="_blank">Figure 6</a> (Isothermality, Temperature Seasonality, Precipitation of Warmest Quarter, Precipitation of Coldest Quarter) are represented in distinct panels. The morphological disparity index (MDI) value represent the overall difference in disparity between the observed and the unconstrained null hypothesis.