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Science ace
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Science ace

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  • 1. Science ACE Benedict Chin 2A2 (06) Extinction
  • 2. What exactly is extinction? <ul><li>Extinction is </li></ul><ul><li>The end an organism, ( also a group of organisms ) or species . </li></ul><ul><li>The point of extinction is </li></ul><ul><li>The death of the last individual of the species . </li></ul><ul><li>The last existing member of the species dies . </li></ul><ul><li>Functionally extinct is </li></ul><ul><li>When only a small amount of individuals survive. </li></ul><ul><li>These individuals are unable to reproduce, due to old age, unhealthy body ex. </li></ul>
  • 3. Examples of extinct animals <ul><li>Tasmanian Wolf </li></ul><ul><li>Quagga </li></ul><ul><li>Turanian Tiger, Caspian Tiger </li></ul><ul><li>Dodo </li></ul><ul><li>Irish Deer </li></ul><ul><li>Saber Tooth Tiger </li></ul>
  • 4. Tasmanian Wolf Marsupial ( relative of kangaroos) Extinct in England 1486 Extinct in Scotland 1743 Extinct in Ireland 1770
  • 5. Quagga Sub-species of zebra Part of the triple alliance , consisting of the “ Quagga, Wildebeast, and the Ostriches .” to put up a solid defence against predators. Extinct in Amsterdam Zoo 1883
  • 6. Turanian and Caspian Tiger Lived in China Tajikistan Turkey Iran Afghanistan Extinct in 1957
  • 7. Dodo Discovered by Portuguese in 1505 Discovered in island of Mauritius Flightless Extinct in 1681
  • 8. Irish deer Lived in Europe and Ireland Broad antlers Size of a moose Extinct 10000 to 11000 years ago!
  • 9. Sabertooth Tiger Lived in Europe and North America Fast runners Ambush in packs Extinct about 10000 years ago !
  • 10. Animals on the verge of extinction! <ul><li>Polar bears </li></ul><ul><li>Lions </li></ul><ul><li>Tigers </li></ul><ul><li>Egyptian vultures </li></ul><ul><li>Mountain gorillas </li></ul>
  • 11. Polar bears Due to global warming Range of hunting shrinking ( the ice to hunt prey) 20000 to 25000 polar bears left ! 30% of the recognized sub-population are in decline!
  • 12. Lions Number has dropped by more than half in less than 20 years ! From 400,000 lions in 1950 to 16,500 to 47,000 lions now ! Population carved into tight ranges Humans spread into their range and space
  • 13. Tigers <ul><li>Humans are constantly hunting them for </li></ul><ul><li>fur </li></ul><ul><li>paws </li></ul><ul><li>teeth </li></ul><ul><li>gallbladders </li></ul>Under assault, by humans for past decades . About 2,500 tigers left .
  • 14. Egyptian vultures white, and beautiful Lives in Southern Europe, Northern Africa Poisoned by drug Poisoned by Diclofenac, an inflammatory drug
  • 15. Mountain gorillas Losing their habitat Face poaching Have the Ebola disease Hunters, farmers, and diseases.
  • 16. What can we do about it? <ul><li>Since human activities are some of the reasons why extinction comes about, we should try to minimise them, or ensure that they are benign. Such activities include </li></ul><ul><li>Deforestation </li></ul><ul><li>Over-fishing </li></ul><ul><li>Similarly, we also must discourage the hunters or poachers to hunt the poor animals down. One way would be to stop eating a particular food, so as to show disinterest in the animal, and that would deter poachers from hunting. </li></ul><ul><li>For example, shark fin’s soup. If more and more people stop eating shark fin’s soup, there would be no demand for the food. With no demand, there is no need for a supply. Therefore we can try to stop eating some endangered animals and thus discouraging hunters from poaching. </li></ul>
  • 17. Some videos ! They are meaningful <ul><li>Detailed video on extinct animals . </li></ul><ul><li>http://www.youtube.com/watch?v=NNmTLLmhxFQ </li></ul><ul><li>Rediscover of extinct animals ! </li></ul><ul><li>http://www.youtube.com/watch?v=LaQd7Zfqj7g </li></ul>
  • 18. Thank you so much for your attention !
  • 19. bibliography <ul><li>http://en.wikipedia.org/wiki/Extinction </li></ul><ul><li>http://www.50birds.com/extan/gextanimals1.htm </li></ul><ul><li>http://ecolocalizer.com/2009/04/07/10-animals-on-the-verge-of-extinction/ </li></ul><ul><li>http://www.mnn.com/earth-matters/animals/photos/10-animals-on-the-verge-of-extinction/lions </li></ul>

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