Biodiversity  Geog 100
What does it mean?• Biological diversity…  – Species diversity  – Genetic diversity  – Ecosystem diversity• About 1.4 mill...
Species change over time• Most species that evolve on Earth eventually  become extinct as conditions change• Scientists ha...
We are losing biodiversity• Species extinction due to a variety of human  influences…• H = Habitat Destruction & Degradati...
Counting the loss• Famous human-caused extinctions… dodo,  passenger pigeon, many island bird species.• Some of Africa’s a...
Dodo birds
Islands• Island species are especially vulnerable to  extinction.• Why?
Hunting passenger pigeons
The last one died in 1914
Species Under Stress• Threatened species – IUCN Red List• http://www.iucnredlist.org/• Video  http://www.iucnredlist.org/n...
Why it matters• Extinction is forever• "When we try to pick out anything [in nature]  by itself, we find it hitched to eve...
2010 was Intl Year of Biodiversity• http://www.unep.org/iyb/• Ilcp video… http://vimeo.com/11499468
I=PxAxT• Impact on ecosystems• Is a function of all three factors…  – Population  – Affluence (consumption)  – Technology
Protection for endangered species• How can biodiversity be preserved?• Saving the black rhino…• http://www.youtube.com/wat...
Biodiversity in RI• Bioblitz• http://www.rinhs.org/what-we-do/bioblitz/• Group research• Mammals, birds, trees, fish, rept...
Learn more about biodiversity• E.O. Wilson• Umich.edu lesson  http://www.globalchange.umich.edu/globalch  ange2/current/le...
Next week• Student reports.
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Biodiversity

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Biodiversity

  1. 1. Biodiversity Geog 100
  2. 2. What does it mean?• Biological diversity… – Species diversity – Genetic diversity – Ecosystem diversity• About 1.4 million species have been described by science, est’d. 10 to 15 million on Earth.• http://tinyurl.com/283be52• What does “endemic” mean?
  3. 3. Species change over time• Most species that evolve on Earth eventually become extinct as conditions change• Scientists have identified at least five major extinction events over the last 500 million years or so, the last one about 65 million years ago when 75% of species became extinct, including most of the dinosaurs• Today – a human-caused extinction event? About 20% of vertebrates are threatened.
  4. 4. We are losing biodiversity• Species extinction due to a variety of human influences…• H = Habitat Destruction & Degradation• I = Introduced and/or Invasive Species• P = Pollution• P = Population Growth• O = Over-consumption
  5. 5. Counting the loss• Famous human-caused extinctions… dodo, passenger pigeon, many island bird species.• Some of Africa’s animals are on the brink… black rhinos, the African wild dog, several species of frogs & toads, turtles, and fish.
  6. 6. Dodo birds
  7. 7. Islands• Island species are especially vulnerable to extinction.• Why?
  8. 8. Hunting passenger pigeons
  9. 9. The last one died in 1914
  10. 10. Species Under Stress• Threatened species – IUCN Red List• http://www.iucnredlist.org/• Video http://www.iucnredlist.org/news/evolution- lost
  11. 11. Why it matters• Extinction is forever• "When we try to pick out anything [in nature] by itself, we find it hitched to everything else in the Universe.” – John Muir• Ethical considerations – is destruction permissible? Especially unnecessary destruction?
  12. 12. 2010 was Intl Year of Biodiversity• http://www.unep.org/iyb/• Ilcp video… http://vimeo.com/11499468
  13. 13. I=PxAxT• Impact on ecosystems• Is a function of all three factors… – Population – Affluence (consumption) – Technology
  14. 14. Protection for endangered species• How can biodiversity be preserved?• Saving the black rhino…• http://www.youtube.com/watch?v=ilF0nU_d0 CY&feature=player_embedded#!
  15. 15. Biodiversity in RI• Bioblitz• http://www.rinhs.org/what-we-do/bioblitz/• Group research• Mammals, birds, trees, fish, reptiles & amphibians, insects• Bird video http://www.youtube.com/mjgvideo#p/u/2/0Gyn sgOJkWg• Do we have endangered species in RI? Do we have invasive species?
  16. 16. Learn more about biodiversity• E.O. Wilson• Umich.edu lesson http://www.globalchange.umich.edu/globalch ange2/current/lectures/biodiversity/biodiversi ty.html• http://www.biodiversityhotspots.org
  17. 17. Next week• Student reports.

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