1. Warm up 3/19 Draw and label the graph for the Logistic model.
Show the exponential section
Show the carrying capacity
Explain how the carrying capacity is related to density dependent and density independent factors.

2. 19.3: Human Population Growth

3. By the end of this class 20,000 babies will have been born.
What has caused this rapid growth?
How long can this continue?

4. History of Human Population
Hunter-gatherer Lifestyle (500,000 years ago to 12,000 years ago)

5. History of Human Population
Hunter-gatherer Lifestyle (500,000 years ago to 12,000 years ago)
Small nomadic groups
Slow growth rate

6. History of Human Population
The population explosion
Grew due to decline in death
Increased sanitation and hygiene
Increased food supply and economics

8. Population Growth Today
20% of world’s population lives in developed countries (modern, industrialized)
Growth rate is very low (.003 per capita)
80% of population live in developing countries
High growth rate (.015 per capita)

10. Demographic Transition
Model showing how population can stop growing
Stage I: birth and death rate at high levels and population size is stable

11. Demographic Transition
Stage 2: population explosion occurs. Death rates decline as hygiene, nutrition, and education increase, but birth rates remain high.

12. Demographic Transition
Stage 3: Birth rates decrease coming close to death rates which stabilizes population size.

13. Demographic Transition
Stage 4: birth rate drops below death rate so population size decreases.

14. Homework Due Friday Quiz- Friday (Tomorrow)
Lab
Quiz- Friday (Tomorrow)
Ecology – Energy Flow
Exam Wednesday 3/26.
This math will be on the Test! You may use a calculator but not your cell phone.
So Bring a CALCULATOR
Intervention Monday Afternoon and Tuesday Morning.

15. Homework Due Wednesday Due Thursday
Read P
P 374 #1-5
Due Thursday
Read p 383 – 387
P 389 Problems # 1-5
This math will be on the Test! You may use a calculator but not your cell phone.
So Bring a CALCULATOR
Exam Wednesday 3/26. Intervention Monday Afternoon and Tuesday Morning.

16. Class Work
Ecology Vocab #2
Homework
Study Guide