1. Populations

2. Researchers study  Geographic range  Density distribution  Growth rate  Age structure

6. Density Distribution  Random  Uniform  Clumped  Act this out!

7. Density calculations.  Take the number of individuals and divide by the area.  Example

8. Population Growth  Exponential  Logistic

10. Example  Begin with one bacteria  Reproduction doubles size of population  Generation time is the exponent.

11. Factors that affect population growth.  Immigration  Emigration  Birth rate  Death rate

12. Logistic growth

13. Limiting factors  What do you think might limit or slow population growth?

14. Limiting factors  Competition  Predation  Parasitism  Disease  Unusual weather  Natural disaster  Which ones are density dependent?

15. Human population growth  When will we reach our carrying capacity?  You tube- human pop growth