1. Population
Living Environment

2. Objectives…I can… Identify factors that affect population size.
Identify factors that limit population growth.
Differentiate between exponential and logistic growth.

3. 1. Population Growth Factors that affect population size:
1. number of births
2. number of deaths
3. number of individuals that enter or leave the population

4. Carrying Capacity
The largest number of individuals of a population that a given environment can support.
There must be enough...
Food
Water
Shelter
Space

5. 2. Types of Growth
Exponential Growth – growth rate increases at a constant rate (J-shaped curve)
(can occur only with ideal conditions)
Logistic Growth – growth rate slows or stops when carrying capacity is met
(S-shaped curve)

6. 3. Limiting Factors Factors that limit or control population growth
Examples:

7. Human Population Growth

8. Human Population Information
Census Bureau