1. Daily Trivia Mexico City is sinking at a rate of 18 inches per year as a result of draining the water table for human consumption. Mexico City is sinking at a rate of 18 inches per year as a result of draining the water table for human consumption.

2. Bellringer Write a paragraph depicting what life in the US might be like if the population doubled. Write a paragraph depicting what life in the US might be like if the population doubled. Consider topics like: –Available recreation space –Demands on resources –Economic impact

3. Agenda Daily Trivia Daily Trivia Bellringer Bellringer Population Notes Population Notes Ecologist Groups Ecologist Groups Homework Homework

4. V. Population Ecology

5. A. Population Growth 1. Population Density is the number of organisms in a given area. 2. Immigration Moving Into a region 3. Emmigration Exiting a region

6. B. Exponential Growth 1. Starts slow and rapidly progresses as more organisms are available to reproduce. Exponential Growth

7. C. Logistic Growth 1. Carrying Capacity The largest number of individuals that an environment can support. The largest number of individuals that an environment can support.

8. D.Population Limits 1. As population increases it will eventually encounter the environments carrying capacity. 2. Limiting factors will prevent the population size from increasing.

9. E. Density dependent factors 1. These factors have an increasing effect as the population increases. 2. Includes disease, competition, parasites, and food.

10. F. Density Independent Factors 1. These factors are not affected by the density of the population. 2. Includes: Temperature Temperature Storms Storms Floods Floods Drought Drought Habitat disruption Habitat disruption

11. G. Other Factors 1. Predation 2. Competition 3. Crowding and Stress Aggression Aggression Decreased parental care Decreased parental care Decreased fertility Decreased fertility Decreased resistance to disease. Decreased resistance to disease.

12. Homework Kaibab WS Kaibab WS

13. Human Ecology

15. Human Development Human impact on the environment has changes as technology has changed. Human impact on the environment has changes as technology has changed. Hunting & gathering Hunting & gathering Agriculture Agriculture Industry Industry Urban development Urban development Notice that each is increasingly invasive! Notice that each is increasingly invasive!

16. The Green Revolution Middle 20 th century Middle 20 th century Superior breeds of plants developed Superior breeds of plants developed Chemical fertilizers, pesticides, and herbicides used Chemical fertilizers, pesticides, and herbicides used Worldwide food production has doubled! Worldwide food production has doubled!

17. Going Green The next step in human ecology The next step in human ecology The new “green” represents a growing concern regarding human impact on the planet. The new “green” represents a growing concern regarding human impact on the planet.

18. Homework The Invaders Ecologist Article The Invaders Ecologist Article Review Packet (if not done) Review Packet (if not done)