There is enough prey base for the animals to survive, but the problem is the encroachers and poaching.

野外有充足的猎物让其生存下去，但是乱砍滥伐和盗猎却使它们的生存受到威胁。

youdao

For while we are used to talking of slum or shanty dwellers as squatters or encroachers, the story of the Third World is that it is the rich who encroach and do so successfully on the lands of communities.

FORBES: Enterprising Nubian Slum-dwellers Dream Of Their Own Homeland in Kibera