Population Regulation

Question 1

Population Regulation

Answer 1

Population growth is regulated by factors that limit population growth - some are density dependent while others are density independent.

Question 2

Density Dependant Factors

Answer 2

Density-dependent factors reduce a population when number are high and allow the population to increase when numbers are low. (influenced by how crowded the population is).

Question 3

Density Dependant Factors (biotic)

Answer 3

• Food supply
• disease
• predation
• parasites
• competition

Question 4

Effect of more crowded organisms

Answer 4

• Compete more for resources
• More found by predators
• Spread disease and parasites more rapidly

Question 5

Density Independent

Answer 5

Density-independent factors are those that act independently of population density and affect all individuals more or less equally.

Question 6

Density Independent Factors (Abiotic)

Answer 6

Physical Factors:
- Rainfall and temperature

Catastrophic events:
- Earthquakes and flooding

Question 7

Predation

Answer 7

Predation provides energy to prolong the life and promote the reproduction of the organism that does the killing.