Reference no: EM131048385
Assignment: Earth's Physical Environment
Please answer the questions below based on information from the video Santa Cruz Island: Restoring Balance
https://vimeo.com/12474602
1. Why are island species vulnerable to invasion?
a. They are not adequately adapted to their environments
b. They have not evolved defenses against invaders
c. All of the above
d. None of the above
2. What animal species were introduced on Santa Cruz Island by European settlers?
a. Pigs and sheep
b. Golden eagles, pigs, and sheep
c. Sheep, pigs, and cattle
d. Fox, gold eagle, and pigs
e. All of the above
3. How did pigs on Santa Cruz Island impact the fox population?
a. They ate the same food as the foxes, reducing foxes' food supply
b. They ate the main food source of mice and rats, which in turn are eaten by the fox
c. They support eagle populations that also prey on the foxes
d. The pigs are omnivorous and eat foxes if no other food is available
e. The pigs destroyed the dens of the foxes
4. What allowed Golden Eagles to get established on Santa Cruz in the first place?
a. Bald eagles were hunted to extinction on the island
b. Humans introduced the golden eagle intentionally to control the pigs
c. Humans introduced the golden eagle intentionally for aesthetic reasons
d. DDT weakened bald eagle eggs and the bald eagle population went to zero.
5. What other native species was reintroduced besides the fox?
a. Native bobcat
b. Sheep
c. Mountain lion
d. Bell's vireo (endangered bird)
e. Bald eagle
6. Please describe in detail two examples of ecosystem restauration success on Santa Cruz Island that are mentioned in the video.
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