2: Coexistence

Question 1

When do competitors coexist?

Answer 1

When:
Intraspecific competition&raquo_space; interspecific competition
Intraspecific density dependence&raquo_space; interspecific interactions

Question 2

Describe character displacement

Answer 2

species traits that overlap when species do not share a geographic region are selected to diverge when they do share a geographic region
= they diverge when they share a geographic region

Question 3

What is the R* of a species?

Answer 3

R* represents the resource threshold below which a species cannot persist

Question 4

In R*, when is coexistence more likely?

Answer 4

coexistence is more likely when the R* values of different species do not overlap extensively

Question 5

Describe what would happen if 2 species have very similarly overlapping R* values

Answer 5

Overlapping R* values = they both require similar amounts of the same limiting resource

Results in intense competition, potentially leading to competitive exclusion, where one species outcompetes and eliminates the other