BIOL 115 Environmental Science

BIOL 115 Environmental Science PowerPoint PPT Presentation


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QUIZLET: Which of these assertions are in the realm of science?. a. The Detroit Tigers are a great baseball team.b. Geese fly south in the winter.c. Dust from agricultural fields is causing allergic reactions in area schoolchildren.d. My roommate is the most qualified candidate for president of the Student Commission.e. Overharvesting of blue crabs in the Gulf of Mexico causes sawgrass marsh to die off.f. Restricting harvest of blue crab is ill-advised because it will decimate the local ec30241

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BIOL 115 Environmental Science

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1. BIOL 115 Environmental Science Professor: Dr. E. Binney Girdler

2. QUIZLET: Which of these assertions are in the realm of science? a. The Detroit Tigers are a great baseball team. b. Geese fly south in the winter. c. Dust from agricultural fields is causing allergic reactions in area schoolchildren. d. My roommate is the most qualified candidate for president of the Student Commission. e. Overharvesting of blue crabs in the Gulf of Mexico causes sawgrass marsh to die off. f. Restricting harvest of blue crab is ill-advised because it will decimate the local economies of many Gulf Coast communities.

3. Human Population Growth Number of people on the planet Amount of resources used by each one

4. Two population growth models

5. Feedback Loops

6. Negative feedback acts to stabilize a system

7. Negative feedback acts to stabilize a system

8. Positive feedback acts to de-stabilize a system

9. Positive feedback acts to de-stabilize a system

10. A system can have both positive and negative feedback loops

11. Time delays can destabilize system Thermostat example What happens when the heater is very far from the thermostat?

12. Time delays can destabilize system Thermostat example What happens when the heater is very far from the thermostat? Residence hall showers?

13. Two population growth models

14. Two population growth models

15. Examples of logistic growth

16. Assumptions of logistic growth Constant environment Constant carrying capacity (K) Homogeneous population Not characters the human population exhibits

17. Predicting Human Population Growth Changing demographics Factors that affect future growth TFR Age structure Migration

18. Demographic determinants of future growth Total Fertility Rate (TFR) Age structure Migration

19. Demographic determinants of future growth Total Fertility Rate (TFR) Age structure Migration

20. Factors that affect TFR Culture and fertility Socioeconomic status of women Family planning

21. Factors that affect TFR Culture and fertility Role of children in economy/society

22. Factors that affect TFR Culture and fertility Effects of infant mortality rate

23. Factors that affect TFR Socioeconomic status of women Age at first reproduction

25. Factors that reduce TFR Socioeconomic status of women Age at first reproduction

26. Factors that affect TFR Socioeconomic status of women Age at first reproduction Education

27. Factors that affect TFR Socioeconomic status of women Age at first reproduction Education Income

28. Factors that affect TFR Family planning Societal mores

29. Factors that affect TFR Family planning Societal mores Contraception

30. Factors that affect TFR

31. Factors that affect TFR

32. Demographic determinants of future growth Total Fertility Rate (TFR) Age structure Migration

33. Age Structure of Populations

34. Age Structure of Populations

35. Age Structure of Populations

36. Demographic determinants of future growth Total Fertility Rate (TFR) Age structure Migration

37. Migration Relief is temporary and finite Short term effects exacerbate problem: immigration is usually in the direction of higher standards of living.

39. Even if a country’s TFR falls below replacement (2.1 in developed and 2.7 in developing nations), that country’s population may continue to increase.

40. What is our fate?

41. Your Ecological Footprint

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