Question

The tall wetland plant, purple loosestrife, was brought from Europe to the

United States in the early 1800s as a garden plant. The plant's growth is now
so widespread across the United States that it is crowding out a number of
native plants. This situation is an example of

Answer 1

This plant is an invasive species.

Answer 2

Answer: an unintended effect of adding a species to an ecosystem.