1. Chapter 5 Biological Diversity and Conservation
5.1 Vanishing Species
5.2 Conservation of Biodiversity

2. Section 5.1 Vanishing Species
Explain biodiversity and its importance.
Relate various threats to the loss of biodiversity

3. Biological Diversity(生物多样性)
Biodiversity refers to the variety of species in a specific area

4. Importance of Biodiversity
Importance to nature
An organism suffers when a plant or animal it feeds upon is removed permanently from a food chain or food web.
A population may soon exceed the area’s carrying capacity if its predators are removed.
If the symbiotic relationships among organisms are broken due to the loss of one species, then the remaining species will also be affected.

5. Importance of Biodiversity
Importance to people

6. Areas improving Biodiversity
Edge effect- area where two or more ecosystems meet and the migration of species between both sets of abiotic factors increases biodiversity
How does this relate to human being?

7. Questions
Why do tropical rainforests have such great biodiversity?

8. Threats to Biodiversity
Endangered species（濒危物种）
endangered species when its numbers become so low that extinction is possible
Threatened species
When the population of a species is likely to become endangered, it is said to be a threatened species

11. Question
What are two ways a species can become endangered?

12. Threats to Biodiversity
Habitat loss

13. Threats to Biodiversity
Habitat fragmentation
• breaking of a habitat through natural or unnatural causes
Can cut off migration lines, recourses, etc.

14. Threats to Biodiversity
Habitat degradation
Acid rain
Water pollution
Land pollution
Exotic species
Depletion of Atmospheric Ozone

15. Question

16. Conservation Biology Legal protections of species Preserving habitats
Protecting Natural
Resources

17. Habitat corridors
Protected land that allows migration to different areas

18. Conservation Biology Sustainable development
Reintroduction and species preservation programs
Captivity
Protecting plant species

19. Question

20. Question

21. Homework Quiz on Unit 1 and 2 Read and study vocab for Ch. 6
Ch. 5 section in the workbook by Friday
Research a program or company trying to protect a specific species or area of the Earth. Write a 1 paragraph summary on their work and suggest some way you or others could help them. (Due next class)

22. That’s all !