1. What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague Regulation

2. Discrete Generation Growth ModelCharacteristic Density-Independent Geometric Growth Density-Independent Geometric Mean Growth Density-Dependent Growth

3. Biotic Regulation Density-Dependence Individual-Level, Birth and Death –Depends on Population Size Driven by Ecological Interactions

4. Self-Regulation Species Growth Responds to Own Density Intra-specific Competition Limiting resource(s)

5. dN/dt = F(N) N

6. Glycine soja (soy bean)

7. Tribolium confusum (flour beetle)

8. “ – 3/2 Rule”

9. Drosophila melanogaster

10. Melospiza melodia (song sparrow) Seed Production

11. Logistic Growth

12. Brewer’s yeast

13. Tasmanian sheep

14. References http://jan.ucc.nau.edu/~doetqp-p/courses/env470/Lectures http://www.micro.utexas.edu/courses/levin/bio304