12

Question 1

Species area curve?

Answer 1

X axis: area of land in log

Y axis: species richness in log

Question 2

What really determines population growth between different areas?

Answer 2

Abiotic conditions.

Question 3

What is everything that could increase species richness with increasing area?

Answer 3

•Increasing the number of different habitats
•the more space a species can use to reduce extinction.
•extinction rate due to stochasticity in a larger population is less likely

Question 4

Which types of islands have higher immigration rates: far/near?

Answer 4

Near

Question 5

Assumptions of Island biogeography theory (IBT) and how these assumptions play into ecological processes? 6•

Answer 5

Assumptions:

•all organisms are equally likely to colonize an island
•all organisms are equally likely to establish
•all organisms are equally likely to go extinct

Based on assumptions then:

•Population abundance: same
•Abiotic requirements: same
•Biotic interactions: same

Question 6

Why do larger areas have a higher immigration rate?

Answer 6

Larger areas are more detectable by colonists in a probabilistic view.

Question 7

What affects extinction rates?

Answer 7

The conditions of the area, not the size.