* General: The introduction of invasive species like the zebra mussel has had a devastating impact on the Great Lakes ecosystem.
* Impact: Invasive species can outcompete native plants and animals, disrupting the natural balance of an environment.
* Control: Wildlife managers are working hard to control the spread of invasive species to protect biodiversity.
* Prevention: Preventing the introduction of invasive species is crucial to protecting our natural resources.
* Example: Kudzu, a fast-growing vine, is a notorious invasive species that has overrun parts of the southeastern United States.