How come invasive species cause problems in their new ecosystems?

No natural predators

Explanation:

Invasive species cause harm to wildlife in many ways. When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. ... Native wildlife may not have evolved defenses against the invader, or they may not be able to compete with a species that has no predators.

Brainliest..maybe?

 No natural predators.

Explanation:

If a new species is introduced, it can grow out of control without any predators in that area. It could also make other species become endangered because the new species would compete with the natural species.