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9/26/14 Objective: How are humans impacting biodiversity?

9/26/14 Objective: How are humans impacting biodiversity? Do Now: What is the difference between a threatened and endangered species? (Finish video clip) http://www.youtube.com/watch?v=XWBzwtVXzXc. Endangered. Endangered in immediate danger of extincition. Threatened.

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9/26/14 Objective: How are humans impacting biodiversity?

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  1. 9/26/14 Objective: How are humans impacting biodiversity? Do Now: What is the difference between a threatened and endangered species? (Finish video clip) http://www.youtube.com/watch?v=XWBzwtVXzXc

  2. Endangered • Endangered in immediate danger of extincition .

  3. Threatened • A species that is likely to become endangered if it is not protected.

  4. What is the #1 cause? • Habitat destruction leads to species endangerment

  5. What is biodiversity? • Biodiversity: the total of genetically different organisms in an area A lot of biodiversity: Rainforest

  6. What is biodiversity? • Biodiversity: the total of genetically different organisms in an area litte biodiversity: corn field, desert How might low biodiversity effect the stability of an ecosystem?

  7. Levels of Diversity • Species diversity: # of different species in an area • Ecosystem diversity: the variety of habitats, communities within an ecosystem • Genetic Diversity: different genes within a population

  8. Importance of Biodiversity

  9. Keystone Species • Keystone species: a species that has a major impact and role within an ecosystem. Without them the ecosystem will fall apart. • Sea otter (Decrease Sea Otter  Increase sea urchin-Decrease Kelp- Decrease Fish spawning http://www.youtube.com/watch?v=D3W4OCnHyCs (sea urchin) http://www.youtube.com/watch?v=5xE1bRtl4aA (29 min)

  10. Biodiversity Loss- Deforestation • The clearing of land without replacing it

  11. Hunting and Poaching • Illegal trade of endangered animals • Illegal poaching of animals for food, shelter, trophies Caspian Tiger- 1970 (Iran, Afghanistan, Turkey)

  12. Biological Magnification • DDT was eaten by insects, washed into soils and streams and passed through food webs.

  13. Biological Magnification

  14. What is biological magnification? • Biological magnification: concentrations of harmful substances increase through a food chain/web • DDT: harmful pesticide used during the 60s to kills insects that pray on crops. (Planet in Peril- body burden)

  15. Invasive Species Invasive Species: Species introduced to a non-native area. http://www.youtube.com/watch?v=k3N5t70aJ2A

  16. Why is biodiversity important? • http://www.youtube.com/watch?v=-HSaAlPRN-c

  17. Activity D = Douglas Fir N= Noble Fir C= Western Red Cedar M= Vine Maples H = Western Hemlocks W= White Fir L= Lodge pole pine WP= Western White Pines B= Bigleaf Maple WD= Western Dogwood

  18. Species and Population Survival Lots of genetic diversity  more likely to survive environmental change Bottleneck Effect: Population shrinks, genetic diversity decreases

  19. Ethics, Aesthetics, and Ecotorism • Species have a right to exist • Ecotorism: • Tourism created to support conservation sustainable development of ecologically diverse areas • Rainforests • Coral reefs • Tundra

  20. Nonrenewable Resources • Nonrenewable resources: resources that cannot be replaced once they are used • Examples: fossil fuels (gas, coal), minerals (silicon), metals for packaging • Using too many nonrenewable resources will cause their depletion (reduction) • Recall the Oil graphs

  21. Renewable Resources • Renewable resources: resources that can be replaced • Examples: food, water, solar energy • Increased consumption can stress the natural processes that renew some resources (ex. Fish)

  22. Preserving our Resources • How can we help maintain our supply of both renewable and nonrenewable resources? Reduce: avoid using resource (walk, bike, carpool) Reuse: Use product over and over (dishes, paper bags) Recycle: Discard in a way that it can be used again

  23. Exponential Growth • Population increases with each generation • Due to: • an increase in food production • an increase in hygiene • an increase in medicine and technology

  24. Carrying Capacity • Carrying Capacity: the maximum population an ecosystem can support.

  25. Carrying Capacity is reached when… • A species consumes a particular natural resource at the same rate at which the ecosystem produces the resource • Limiting Factors: can be sunlight,water, food, space, mineral nutrients, oxygen, etc.

  26. Carbon Footprint • The amount of carbon emitted by you in your daily lives.

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