Question: One problem with eradicating invasive species is that sometimes the disturbed area is unable to be colonized by native species. For example, in forests where the invasive plant garlic mustard has been removed, native plants and animals do not recolonize because they are extinct in that patch of forest. How should restoration ecologists increase species diversity and recover ecosystem function? Need Assignment Help? Question Answer Introduce tertiary consumers. Eliminate keystone species. Develop movement corridors for primary producers.