1. How they grow and what affects them
Populations
How they grow and what affects them

2. Characteristics of a Population
Population Density
How many organisms in a specific area
Geographic Distribution
Where is the population located
Growth Rate
How much is the population changing

3. Growth Rate Factors that affect the Growth Rate # of births
# of deaths
Individuals leaving or entering the population
Immigration: Entering IN to a population
Emigration: EXITING a population

4. Types of Growth Exponential J Curve
Reproduction happens at a constant rate
Happens under ideal conditions with unlimited
resources

5. Types of Growth Logistical S Curve
Population continues to grow but at a slower rate
Happens when resources
become scarce

6. Carrying Capacity
This is the number of individuals a given environment can sustain for a specific population
Carrying Capacity!

7. Limiting Factors What limits the growth of a population?
Density Dependent: Only become limiting when the population reaches a certain level of density
Density Independent: Affect all of the populations in the same way.

8. Density Dependent
Competition
Predation
Disease
Parasites

9. Density Independent Weather Natural disasters Human Factors
Damming Rivers
Deforestation
Controlled Burns

10. Human Population Growth