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Biodiversity.ppt

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Biodiversity.ppt

  1. 1. Which do you like better? A B
  2. 2. Which do you like better? A B
  3. 3. Which do you like better? A B
  4. 4. Which do you like better? A B
  5. 5. A B Which do you like better?
  6. 6. A B Which do you like better?
  7. 7. A B Which do you like better?
  8. 8. What do you think biodiversity means?
  9. 9. Bio = Biodiversity What does “Bio” mean?
  10. 10. Biodiversity Diversity = Variety What does “Diversity” mean?
  11. 11. Biodiversity is the variety of life on Earth and the essential interdependence of all living things • Scientists have identified more than 1.4 million species. Tens of millions -- remain unknown (www.thecatalogueoflife.org) •The tremendous variety of life on Earth is made possible by complex interactions among all living things including micro- oganisms.
  12. 12. There are 3 components of biodiversity 1. Diversity of genes Chihuahuas, beagles, and rottweilers are all the same species —but they're not the same because there is variety in their genes. Chihuahua Beagle Rottweilers
  13. 13. 2. Diversity of number of species For example, monkeys, dragonflies, and meadow beauties are all different species. Saki Monkey Golden Skimmer Meadow Beauty There are 3 components of biodiversity
  14. 14. 3. Variety of ecosystems Lakes, Ponds, and Rivers are all Freshwater Ecosystems. Rocky coast, Sand Dune, Estuary, Salt Marsh , Coral Reef are all Marine Ecosystems. So what’s an ECOSYSTEM??? There are 3 components of biodiversity
  15. 15. ECOSYSTEM DEFINITION “ A self-contained community of microorganisms, animals and plants, that interact with each other and with their physical environment.” eg a rock pool
  16. 16. Why is a list of species not ‘Biodiversity’ ?
  17. 17. Which is more diverse? A B
  18. 18. Which is more diverse? A B
  19. 19. Which is more diverse? A B
  20. 20. A B Which is more diverse?
  21. 21. A B Which has more cultural diversity?
  22. 22. Which has more biodiversity? A B
  23. 23. Which has more biodiversity? A B
  24. 24. Why does high biodiversity create a more stable environment? • more species = more links in food chains/webs = more stable • more plants = more food for other animals (more oxygen too) • more genes = better chances for survival through adaptation • a variety of ecosystems = more habitat for different species
  25. 25. What do we get from biodiversity? Oxygen Food Clean Water Medicine Aesthetics Ideas
  26. 26. Should we be concerned about biodiversity? What we know: The Earth is losing species at an alarming rate • Some scientists estimate that as many as 3 species per hour are going extinct and 20,000 extinctions occur each year. • when species of plants and animals go extinct, many other species are affected.
  27. 27. Threats to biodiversity Habitat destruction Pollution Species Introductions Global Climate Change Exploitation
  28. 28. BIODIVERSITY
  29. 29. ENDANGERED VS THREATENED Threatened: population low but extinction less imminent Endangered: nos so low that extinction imminent
  30. 30. THE GREATEST THREAT
  31. 31. BIODIVERSITY http://www.nesarc.org/ http://www.stopextinction.org/ http://www.audubon.org/campaign/esa/esa.html http://endangered.fws.gov/

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