Population and Sustainability

Question 1

What affects population size/abundance? (4)

Answer 1

Abiotic Factors:

• Light intensity and Water availability (1)

Biotic Factors:

• Predation and competition (1)

Question 2

What are the types of competition? (4)

Answer 2

Interspecific (1)

• Resources shared between different species (1)

Intraspecific (1)

• Pattern fluctuates on carrying capacity as the more abundance of species use more resources (1)

Question 3

What is carrying capacity? (1)

Answer 3

• The maximum stable population size an ecosystem can support (1)

Question 4

How are woodlands conserved? (6)

Answer 4

Selective felling (1)

• Removing largest tree to let immature trees grow (1)

Coppicing (1)

• Trees cut close to the ground to encourage growth (1)

Pollarding (1)

• Trees are cut slightly higher so deer doesn’t eat new shoots (1)

Question 5

How is marine life conserved? (4)

Answer 5

Fishing quotas (1)

• Limit number of fish the fisherman are allowed to catch (1)

Controlling mesh size (1)

• Fish net with larger holes to let young fish escape (1)