Humans have altered ecosystems by activities that are sometimes deliberate and sometimes accidental. In

the United States, humans have altered ecosystems by introducing invasive species that outcompete native

species. Which activity resulted in the accidental introduction of an invasive species?

(1) importing Japanese knotweed because it has an attractive flower

(2) transporting zebra mussels to the Great Lakes by discharging water taken on in European ports to

stabilize large ships

(3) releasing Chinese mitten crabs in the Hudson River to establish them as a food source

(4) planting purple loosestrife that was brought here from Europe as a source of medicine

Question

18 November, 22:49

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Answers (2)

Know the Answer?

Ramos · Answer 1

(2) transporting zebra mussels to the Great Lakes by discharging water taken on in European ports to

stabilize large ships

Natalia Mckenzie · Answer 2

3 releasing Chinese mitten crabs in the Hudson River to establish them as a food source