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Friday, March 15

Friday, March 15. A film, instead of lecture. Human Impact. EEE 105. Read Ch. 12. http://www.life.uiuc.edu/animalbiology/105/. Name: eee105. Password: prAIRie. Human Impact. Extinction.

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Friday, March 15

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  1. Friday, March 15 A film, instead of lecture

  2. Human Impact EEE 105 Read Ch. 12 http://www.life.uiuc.edu/animalbiology/105/ Name: eee105 Password: prAIRie

  3. Human Impact Extinction Conservationists estimate that the current extinction rate is 1,000 to 10,000 times higher than it should be under natural conditions.

  4. Human Impact Extinction Why? habitat destruction introduced competitors and predators e.g. birds of Guam

  5. Invasive species • Brown Tree Snake introduced to Guam • Has driven 12 bird species extinct

  6. Invasive species

  7. Invasive species • Biotic pollution • Inadvertent human transport

  8. Invasive species • Biotic pollution • Inadvertent human transport • e.g. The Great Lakes

  9. Eurasian ruffe

  10. Round goby

  11. Entered Great Lakes 1921 Sea Lamprey

  12. Sea Lamprey kill > 40 million pounds of fish each year

  13. Human Impact Extinction Why? habitat destruction introduced competitors over-hunting disappearance of N. American megafauna 13,200 years ago

  14. N. American Megafauna

  15. opposable thumb Giant sloth Titanis N. American Megafauna

  16. N. American Megafauna 0verhunting? Clovis people

  17. Human Impact Extinction Why care? indicator species e.g. Northern Spotted Owl

  18. Human Impact Extinction Why care? indicator species valuable genes

  19. Valuable genes • E.g. A new frog species discovered in SE Queensland, Australia in 1973

  20. Valuable genes • Female incubates eggs in her stomach turns off gastric juices for 6 weeks

  21. Valuable genes • If we could find how she does this this could be used in treating ulcers But in 1981, this frog disapperared

  22. Decline of Amphibians

  23. Human Impact Extinction Why care? indicator species valuable genes being human

  24. Human Impact Extinction Conservation saving endangered species

  25. 30” Human Impact Extinction Conservation saving endangered species Is the Ivory-billed Woodpecker extinct?

  26. Is the Ivory-billed Woodpecker extinct? thought extinct in U.S. in 1950’s found in Cuba in 1970’s but lost there too a reported sighting in 1999 in LA

  27. Ecotourism • E.g. Mountain Gorilla

  28. Whooping cranes Human Impact Extinction Conservation saving endangered species

  29. Adopt an endangered species • Peregrine falcon • bison • bats • lemurs • Zoo animals • gorilla • Web of Life

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