1. 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)

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
(sea urchin)
(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 (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)

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

17. Why is biodiversity important?

18. 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

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

20. 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

21. 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

22. 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)

23. 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

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

25. Carrying Capacity
Carrying Capacity: the maximum population an ecosystem can support.

26. 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.

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