While researching a topic, a student has taken the following notes:
- A nonnative species that causes environmental or economic harm when introduced to an ecosystem is considered invasive.
- Quack grass is an invasive species of grass that crowds out crops and native plants.
- It was first introduced to the US accidentally through seed contamination.
- Giant reed is an invasive species of wetland plant that crowds out native plants and reduces wildlife habitat.
- It was first introduced to the US to help control erosion.