Figure 4.

Plots of node ages against standardized contrasts in species’ edaphic preferences. Node ages are based on transformed branch lengths; see text for details. Points are nodes in the Banksia phylogeny; dashed lines are least-squares regressions through the origin; solid circles are significant outliers from the regression line (absolute studentized residual > 3), indicating nodes with a greater divergence in a given edaphic preference than expected from their age.

Cardillo BMC Ecology 2012 12:21   doi:10.1186/1472-6785-12-21
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