PPT Slide
Sometimes predator species can drive their prey to localized extinction.
If there are no alternate prey, the predator then goes extinct.
If the environment is coarse grained, this makes the habitat available for recolonization by the prey species.
Example: The parasitic wasp Dieratiella rapae is a very efficient parasitoid. One female can oviposit into several hundred aphids during its lifetime. Frequently, aphids are driven locally extinct and the adults must search for new patches when they emerge. Once the aphid and the host are gone, the host plants may become re-infested with aphids.