to populate (an area) too heavily for the available sustaining resources
verbo·ver·pop·u·lat·ed, o·ver·pop·u·lat·ing, o·ver·pop·u·lates
To fill (an area, for example) with excessive population to the detriment of the inhabitants, resources, or environment.
To breed to excess: wild animals that overpopulated and then starved.
(third-person singular simple present overpopulates, present participle overpopulating, simple past and past participle overpopulated)