Figure 4. Relationships derived from binary classification trees between density of tortoises (A) and tortoise droppings (B) with thresholds of adult cactus density and large diameter woody plant density; between small diameter woody plants (C) with thresholds of large diameter woody plant density; and between density of juvenile cactus (D) with thresholds of large diameter woody plant density and adult cactus density.

Density of tortoises, tortoise droppings, and cactus are expressed as number/hectare; woody plants as stems/100 m².