Warm up 3/19 Draw and label the graph for the Logistic model.

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Presentation transcript:

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.

19.3: Human Population Growth

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

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

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

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

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)

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

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

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

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

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.

Homework Due Wednesday Due Thursday Read P 371- 374 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.

Class Work Ecology Vocab #2 Homework Study Guide