Aim What does the phrase “ Human impact on Ecosystems” mean?

1. AimWhat does the phrase “Human impact on Ecosystems” mean?

2. Explain what has happened to the polar bear in the picture below.

3. Ecosystem- all the living and non-living things that interact in a certain area of the environment

4. Environmental Impact • All living things, including humans, affect the environment around them

5. Beaver Example • Beavers build dams and affect the flow of water in the river

6. Termite Example • Termite affect the environment by eating wood on trees

7. Human Impact • As a result of technology we are making more significant changes to the environment. • Give an example of how technology changes the environment? Where are i-phones made?

8. Stress on the Environment • Human growth consumption depletes resources that the earth contains • Industrialization

9. Pollutions affect on an Ecosystem • Pollution decreases the stability of an ecosystem • Pollution decreases biodiversity by harming species habitat

10. Depletion • Depletion means a serious reduction in a short period of time

11. Finite Supply • They cannot be replaced naturally • We will eventually run out of supplies

12. What are some human activities that negatively affect the environment?

13. Deforestation • Cutting trees down • Destroys Habitats • Causes Erosion • Decreases Biodiversity

14. Why do we cut trees? For Industry (Jobs) • Paper • Housing • Furniture

15. Fossil fuels • Fuels that come from the ground • Burning them produces energy to heat our homes, run our cars, and produce energy to run factories • Examples- Oil, Gas and Coal

16. Burn Fossil Fuels • Produces Carbon Dioxide (CO2) (Greenhouse gas) • Causes Global Warming • Melts the Ice Caps

17. Natural Resources • Renewable – Resources can be replaced quickly (Solar and wind power) • Non-Renewable- Resources cannot be replaced quickly (Fossil Fuels-Oil, Coal, Gas)

18. Ozone Depletion • Caused by Freon gas in refrigerators and air conditioners • More UV (ultra-violet) rays reach the earths surface • Causes mutations and skin cancer

19. Strip Mining • Depletes Resources • Causes Erosion

20. Overfishing • Kills fish • Depletes supply of fish for future generations

21. How does the government prevent pollution? • Pass Laws to prevent it • Impose a fine or penalty

22. AimHow and why do we need to preserve our natural resources?

23. How do we preserve resources? • Reduce consumption • Reuse resources • Recycle

24. Reduce • Carpooling • Mass transit • Conserve (walk or ride your bike)

25. Reuse • Grocery Bags • Water bottles • Plastic plates

26. Recycle • Plastic • Paper • Scrap metal • Glass

27. Why do we need to conserve resources? • Resources are finite (limited), so we will run out • Prevents pollution

28. Define Pollution • Pollution is the harmful change in the environment that will affect an organisms habitat (where it lives)

29. Types of Pollution • Air pollution • Water pollution • Land pollution

30. Natural Recycling • Water Cycle • Carbon Cycle • Nutrients

31. Water Cycle • Ecosystems maintain a supply of water to survive

32. Carbon Cycle • Animals take in oxygen and release carbon dioxide (Cellular Respiration) • Plants take in carbon dioxide an release oxygen (Photosynthesis)

33. Nutrients Recycle • Plants use nutrients in the soil to grow • Nutrients are transferred through food chain • Dead and waste of organisms are recycled and put back into the soil by decomposers (Bacteria and Fungi)

34. AimHow do people affect the way ecosystems function?

35. The Flow of Energy • Energy is passed through the environment but NOT recycled • Energy pyramid loses large amount of energy to heat • Sun is constant source of energy

36. Population Growth • The population levels off as it reaches an ecosystems carrying capacity

37. Direct Harvesting • Destruction or removal of a species from a habitat which can lead to extinction • An example is when an exotic animal is removed for a pet ( Cute monkey or parrot)

38. Invasive Species • When people remove a species from one environment to another • They become pest because they usually have no natural enemy and multiply quickly

39. Land Use • As human populations grow we need more resources to make things we need (clothes, MP3 players and cars) • Need more space for factories and homes

40. Deforestation • Need to clear land to make homes and factories • This leads to habitat destruction

41. Leads to Loss of Biodiversity • Direct Harvesting • Imported Species • Deforestation

42. AimWhat is the impact of technology and industrialization on the environment?

43. Industrialization • The development of an economy in which machines produce our products

44. We Need Power • Burn fossil fuels • Nuclear fuels (splits atoms)

45. Power Plants Cause: • Water pollution • Air pollution

46. Water Pollution • Sewage from a power plants can act as a fertilizer • Plants bloom using up oxygen resulting in fish suffocating

47. Toxic Waste • Poisonous waste dumped in rivers end up in the food chain • Many organisms are killed as a result of these toxins

48. Air Pollution Burning fossil fuels leads to • Increase in CO2 levels (Global Warming) • Acid rain • Smog

49. AimHow will the choices we make today affect our environment tomorrow?

50. Advances in Technology • New factories • Increase crop yield • Efficient cars • New Computers and iPods