1. Warm Up 10 4/17 The area inhabited by a population
# of individuals per unit area
When death rate exceeds birthrate, the population will (increase/decrease)
(immigration/emigration) causes a decrease in population.
Exponential growth or Logistic growth?
5. When resources are unlimited, population grows at a constant rate
6. Characterized by a S-shaped curve.
7. In logistic growth, ______________ is eventually reached, which is the largest # of individuals a population can hold.

2. 5.2 Limits to Growth

3. Limiting Factors factor that causes population growth to decrease
Ex: Competition, predation, parasitism, disease, drought, human disturbances
2 Types:
Density-Dependent Factors
Density-Independent Factors

4. 1) Density-Dependent Factors
Factor that depends on population size
Affect large/dense populations, not small/scattered

5. Density-dependent limiting factors
Competition (same or different species)

6. Density-dependent factors
Predation (Predator-prey relationship)

7. Density-dependent factors
Parasitism and Disease- weakens host causing disease/death

8. 2) Density-Independent factors
Affect ALL populations regardless of size
Unusual weather, natural disasters, seasonal cycle, human activities

9. 3. Density-dependent factors operate most strongly when a population is
large and dense.
large but sparse.
small and sparse.
small, but growing.

10. 4. Within a limited area, if the population of a predator increases, the population of its prey is likely to
increase.
decrease.
remain about the same.
become extinct.

11. 5. Which of the following is a density- independent factor affecting populations?
predation
disease
a destructive hurricane
parasites