1. 1 Review Describe the different components of global biodiversity 2 Review What are the major threats to biodiversity 3 Review What is the goal of a species survival plan Form an Opinion Do you think that the hot spot strategy is a good one- explain

2. Ch 6 Humans in the Biosphere
6.3 Biodiversity

3. The Value of Biodiversity
Total of all the genetically based variation in all organisms in the biosphere
What value does it offer society.

4. Types of Biodiversity Ecosystem diversity Species diversity
Variety of habitats, communities, and ecological processes
Species diversity
Number of different species in the biosphere, or in a particular area
Genetic diversity
Total of all different forms of genetic information carried by a particular species or by all organisms.

5. Valuing Biodiversity Medicine Agriculture Ecosystem Services
Wild species were the beginnings of most medicines
Agriculture
Most crops and livestock have wild ancestors
Ecosystem Services
Interrelatedness of species.

6. Stability
The greater number of organisms in a food web the more stable
Why
Especially true for producers
Greater Variety Greater Stability.

7. Threats to Biodiversity
Altering habitats, hunting, introducing invasive species, pollution, and contributing to climate change
Most are human caused
Current rate of species loss is approaching times the “typical” rate.

8. Simplify What gets planted in a farm field What happens if Why
Potato blight (Ireland)
Corn Borer
Dutch Elm Disease
Emerald Ash Borer.

9. Altered Habitats
Natural habitats are lost for agriculture or for urban development
Number of species drops, and some become extinct
Habitat fragmentation
Splitting up ecosystem and leaving small chunks surrounded by a different habitat.

10. Hunting and the Demand for Wildlife Products
Over hunting can lead to extinction
Food, pelts, skins, feathers, animal parts.

11. Introduced Species Species moved from one habitat to another
Often can out compete native species
Lack of predators or species to control their growth.

12. Pollution
Can kill organisms, lower reproductive rate, alter environment.

13. Climate Change
Most organisms have a specific tolerance and can survive in only a particular environment and climate.

14. Protecting Individual Species
Book
Association of Zoos and Aquariums (AZA)
Species survival plans (SSPs)
More familiar
Endangered Species List
Threatened Species List.

15. Preserving Habitats and Ecosystems
Government
Parks
Forests
Wetlands
Grasslands
BLM
CRP
Shorelines
Rivers
Conservation Groups
Nature Conservancy
Private parks/reserves.

16. Ecological Hot Spot
Place where significant numbers of species and habitats are in immediate danger of extinction.

17. Considering Local Interests
United States government has offered tax credits for hybrid cars or green energy
Communities in other countries, rather than farm or log, set aside land as nature reserves and make money off tourists
Farmers are paid to plant trees along rivers and streams
Carbon credits for industries.