Island Biogeography

Question 1

As extinction increases, immigration decreases

Answer 1

Extinction rates

Question 2

Islands that are closer to the mainland (or other large islands) will have higher rates of immigration. However, as more species inhabit the island, immigration will decrease (no more room). With more species come higher extinction rates

Answer 2

Immigration

Question 3

are sensitive to changes and are often wiped out by invasive species.

Answer 3

Specialists

Question 4

invasive species are commonly generalists that have few to no native predators and are able to fill a broad niche. This often leads to the downfall of the endemics.

Answer 4

Invasive species

Question 5

The islands’ distance from the mainland affected the birds’ evolution.

Since there was no further immigration from the mainland, the birds adapted to the islands and evolved away from their mainland cousins.

Answer 5

Evolution