Figure 3.

Phylogenetic beta diversity patterns based on the endemic Madagascan species of legumes and their ecological niches. (a) Definition of the eight evolutionary units (K1–8) based on a clustering analysis; (b) evolutionary units plotted onto the map of Madagascar; phylogenetically clustered (black squares) and over-dispersed (white squares) communities are indicated as well as watershed delimitations (black lines); and (c–f) box plots summarizing the altitude, annual precipitation, SR and PD associated with each evolutionary unit.