1. Population A group of organisms that belongs to the same species Population members breed with each other and live in the same area

2. Population dynamics The study of the change in population numbers and the factors influencing those changes Population size Birth Immigration Death Emmigration

3. Time, in generations Population size Exponential growth –

4. Can this happen in nature? Yes Yes Invasive species

5. Time, in generations Population size Logistic equation – K

6. K = Carrying capacity The maximum number of individuals that a habitat can support for a prolonged period of time Not constant, it fluctuates.

7. Limiting Factors-factors that affect the carrying capacity Density-independent factors Density-dependent factors

8. Population structure A population that is 75% adults, 25% juveniles is very different from a population of 25% adults and 75% juveniles.

9. Population structure Age structure – distribution of ages in a population. Size structure – distribution of sizes in a population.

10. Biodiversity: Who cares?

11. Which is more diverse? A B

12. A B

13. A B

14. A B

15. A B Which has more cultural diversity?

16. Which has more biodiversity? AB

17. AB

18. What do you think biodiversity means?

19. Bio = Bio diversity What does “ Bio ” mean?

20. Diversity = Variety What does “ Diversity ” mean? Biodiversity is the variety of life in an area or on Earth

21. Threats to Biodiversity Things that mess up our delicate balance with Earth 1.Habitat Loss 2.Pollution 3.Exploitation 4.Global Climate Change 5.Invasive Species

22. Habitat Loss Habitat destruction Habitat destruction Logging Logging Ranching Ranching Agriculture Agriculture Houses Houses Roads Roads

25. Exploitation Over hunting Over hunting Over Fishing Over Fishing Over Using Over Using

26. Pollution Pollution occurs in the air, on the land, and in the water. Pollution occurs in the air, on the land, and in the water.

27. Biological Magnification Toxic substances become more concentrated at higher levels in the food chain. Toxic substances become more concentrated at higher levels in the food chain.

28. Ozone Depletion Pollution from chlorofluorocarbons (CFC’s) released into the atmosphere destroys the ozone layer. Pollution from chlorofluorocarbons (CFC’s) released into the atmosphere destroys the ozone layer.

29. Invasive Species Non-native species that is brought into an area that takes over killing many things that live there. Non-native species that is brought into an area that takes over killing many things that live there.

30. Global Climate Change Global Warming : warming of planet due to atmospheric accumulation of carbon dioxide. Global Warming : warming of planet due to atmospheric accumulation of carbon dioxide.

31. KEY BAD WORDS Threatened Species - Threatened Species - any species which is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range Endangered Species - Endangered Species - any species which is in danger of extinction throughout all or a significant portion of its range Extinction - Extinction - no longer in existence

32. Should we be concerned about biodiversity? What we know: The Earth is losing species at an alarming rate Three species per hour are going extinct. Three species per hour are going extinct. When species of plants and animals go extinct, many other species are affected. When species of plants and animals go extinct, many other species are affected.

33. What do we get from biodiversity? Food Food Oxygen Oxygen Clean Water Clean Water Medicine Medicine Survival! Survival!

34. Conservation Biology Conservation Biology Preservations Preservations Rescue programs Rescue programs Resource conservation Resource conservation Reintroduction programs Reintroduction programs A branch of biology that focuses on the preservation of biodiversity

35. Protecting Biodiversity 16 June 2010Biodiversity.ppt35 Biodiversity “hotspots” Biodiversity “hotspots” Protection of habitat Protection of habitat