Unit 3: Invasive Species

Question 1

Difference between native and exotic species

Answer 1

Native species are species living in their historical range, exotic species are moved from their historic range to somewhere they are not from.

Question 2

Why are all exotic species not invasive?

Answer 2

A small percentage of of exotic species are able to live in their new habitat and have no negative effect.

Question 3

Exotic species can sometimes be beneficial, but when are they considered invasive?

Answer 3

When the exotic species rapidly increases in population and causes harmful effects on native species.

Question 4

Why might an invasive species out compete a native species?

Answer 4

They have no natural competitors or predators.

Question 5

What are some ways to control invasive species?

Answer 5

Inspection of international goods, prohibition of untreated packing crates, dewatering, and hunting.