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The Australian Environment Before Human Habitation

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The Australian Environment Before Human Habitation

  1. 2. <ul><li>Australia is the smallest of the continents </li></ul><ul><li>¾ size of Africa </li></ul><ul><li>1/6 size of Asia or Americas </li></ul>
  2. 3. <ul><li>It is the largest Island in the World </li></ul><ul><li>Coastline 12,210miles </li></ul>
  3. 4. <ul><li>Geologically dates back 2,000 years </li></ul>
  4. 5. <ul><li>Once part of the Antarctic Continent – reached its present state through the process of gradual drift </li></ul>
  5. 6. <ul><li>Skeletal remains and fossils indicate that Australia was inhabited by Giant land fauna (Megafauna) </li></ul><ul><li>Eg wombat like creature as large as a Rhino </li></ul>
  6. 7. <ul><li>Arrival of the first humans – sparked massive wave of extinctions and we are still in the middle of another wave with the arrival of the europeans </li></ul>
  7. 8. <ul><li>Before humans, diversity would have changed, but much slower </li></ul>
  8. 9. <ul><li>Every time a species went extinct, by and large something was evolving to fill that niche </li></ul>
  9. 10. <ul><li>Therefore – ecosystems would change throughout time </li></ul>