Partial dependence plots showing the effect of various environmental factors on the distribution of vegetation units. (a) Mean annual temperature (MAT) influencing the distribution of unit 1, the Senegalia mellifera-Monechma thornbush savanna; (b) Mean annual precipitation (MAP) influencing the distribution of unit 3, the Monelytrum luederitzianum-Senegalia hereroensis mountain savanna; (c) MAP influencing the distribution of unit 3, the Calicorema capitata-Rhigozum trichotomum dwarf shrub savanna; (d) MAP influencing the distribution of unit 4, the Salsola-Tetragonia schenckii dwarf shrub savanna.