populations and sustainability

Question 1

coppicing vs pollarding

Answer 1

coppicing- lower down
pollarding- higher up

Question 2

What is the term that describes a biotic factor whose strength alters depending on how many individuals there are per unit area? An example would be that competition for food would be low when there are only 50 deer in a woodland but very high when there are 500 in a woodland of the same size.

Answer 2

Density dependent

Question 3

What principle states that two species competing for exactly the same resources cannot coexist? Either the worse competitor becomes locally extinct in that area or the organisms evolve to use slightly different resources (called resource partitioning).

Answer 3

Competitive exclusion principle