Population ecology of tree succulents (Aloe and Pachypodium) in the arid western Cape: decline of keystone species

aloe animal salvaje animal sauvage apocynaceae birds demografia demographie demography dieback ecologia ecologie ecology flora flore geographical distribution habitat habitats marchitez descendente monkeys mono mortalidad mortalite mortality natural regeneration oiseau papio pests of plants plagas de plantas plantas suculentas plante grasse population ecology porcupines predatory birds rapace ravageur des plantes singe succulent plants wild animals