5/20/24 - Lecture 26: Community Ecology

Question 1

How many feeding links on average are species pairs separated by?

Answer 1

2

Question 2

Indirect effect

Answer 2

A change in the abundance of one species resulting from its interaction with another species which is affected by a third species

Question 3

Keystone species

Answer 3

A species that has a major effect on community structure, and an effect disproportionate to their abundance

Question 4

Foundation species

Answer 4

Species that have a major effect on community structure by virtue of their high biomass and habitat-forming characteristics

Question 5

For species “sharing” a common predator, how does altering species density affect the density of the other?

Answer 5

Increasing the density of one decreases the density of the other species. Decreasing the density of one increases the density of the other

Species “appear to be competing”