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Diversity in Ecosystems

Diversity in Ecosystems. Slide Show4. In Canada, 250 species of plants and animals are “ at risk ”. By “at risk” we mean categorized as; Extinct, (species not found anywhere) Endangered, (close to extinction) Extirpated, (No longer exist in one part, but can be found in another)

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Diversity in Ecosystems

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  1. Diversity in Ecosystems Slide Show4

  2. In Canada, 250 species of plants and animals are “at risk”. • By “at risk” we mean categorized as; • Extinct, (species not found anywhere) • Endangered, (close to extinction) • Extirpated, (No longer exist in one part, but can be found in another) • Threatened, (Likely to become endangered if nothing is done) • Vulnerable. (any species at risk because of low or declining numbers)

  3. Extinct, (species not found anywhere) • Dinosaurs, Great Auk, Wooly Mammoth

  4. Endangered, (close to extinction) • Panda, Orangatang

  5. Extirpated, (No longer exist in one part, but can be found in another) • The Newfoundland Wolf

  6. Threatened, (Likely to become endangered if nothing is done) • Newfoundland Woodland Caribou

  7. Vulnerable. (any species at risk because of low or declining numbers) • Polar Bear

  8. Causes of Extinction: • Loss of Habitat • Pollutionof air and water • Large-scale disaster (natural environmental change) • Climate changes • Competition from other species • The single largest factor that cause species to be At-Risk is humans!!!!!

  9. Effects of Extinction: • Loss of Biodiversity • Collapse of food chains Endangered Species: A species that is close to extinction in a large area.

  10. Humans, a recent addition to the planet, have had a profound effect on other organisms. • In the early years of the 21st century, it is estimated that one species will become extinct every 30 minutes. • The majority of threatened species can be found in tropical rainforests.

  11. Nearly 500 million different species have inhabited the planet. Of these, more than 90% have become extinct or have evolved into new species. • Mass Extinctionis the destroying of large numbers of species due to large scale disaster 

  12. For your discussion: • Scientists believe they can sustain endangered species - maybe even one day resurrect some that have died out - using DNA technology • http://www.youtube.com/watch?v=68QhIQLeVUA&feature=related&safety_mode=true&persist_safety_mode=1&safe=active

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