ENDANGERED SPECIES

1. ENDANGERED SPECIES

2. 1.2.3.4.BIOLOGICAL DIVERSITY • SPECIES = a group of closely related organisms capable of breeding and producing fertile offspring • Every day , somewhere on Earth, a unique species of organism becomes extinct • Over 1.7 million species known to science, most are INSECTS (see p 241)

3. 4.5.Levels of BIODIVERSITY • BIOLOGICAL DIVERSITY -refers to the # and type of species in a given area -an important natural resource • SPECIES = all different populations • ECOSYSTEM = variety of habitats and eco- logical processes • GENETIC = all the different D.N.A.

4. 6. Benefits of Biodiversity • Stability of ecosystem • Sustainability of ecosystem • Species survival • Human use and benefit - medicine - shelter - products - food - clothing - knowledge - crops(hybrids)

5. 7.Pacific Yew Slow growing tree in old growth forests of Pacific North West Considered ‘trash’ tree Bark contains TAXOL Promising treatment for breast and ovarian cancer trt

6. 7.Purple foxglove Contains DIGITALIS Prevents ‘dropsy’ (heart failure)

7. 8. Keystone species

8. (8A) Why save species?(bottom of p 1 notes) • Ethical reasons- the right thing to do, right to exist • Aesthetic reasons- beauty, enjoyment, pets, nature • Commercial- agriculture, jobs, tourism, fishing & hunting

9. Major extinctions- see p 245 All genera Well defined genera Trend line Big Five mass extinctions Other mass extinctions Million Years Ago Thousands of Genera

10. 10.LEVELS OF THREAT • EXTINCT- gone forever • ENDANGERED- likely to b/c extinct w/o protective measures • THREATENED- has a declining population likely to b/c endangered See table p 246

11. 11.Prone to Extinctions • Rate of extinctions increasing • Since 1800 up to 25% of all species extinct • Species with small populations • Species with a limited range • Migratory species • Species with special needs • Species exploited by humans

12. 12.Why are Species in Danger? • Destruction of habitat • Introduction of nonnative species • Pollution/Pesticides • Overharvesting • Climate Change

13. AREAS of Critical Biodiversity • Tropical Rain Forests • Coral Reefs • Coastal Areas • Islands

14. 13.Biodiversity Hotspots- p 250

15. The most remarkable areas on earth are also the most threatened. These are the Hotspots, the richest and most threatened reservoirs of plants and animal life on Earth.”

17. 14.California Floristic Province • Zone of Mediterranean climate • Many unique plants like Giant Sequoia • Also critically endangered Ca. Condor • Threatened by farming, pollution, overpopulation, road building etc.

18. 15. Cross out question • INSTEAD: • Answer Questions 20-21-22-23 • On page 260 in the space for #15

19. 16.How do we Conserve Species? • Captive Breeding • Preservation of Genetic Material • Zoos, Parks and Gardens • Research • Protection of habitats & ecosystems • International cooperation • Laws

20. California Condor

21. International Cooperation International Union for the Conservation of Nature and Natural Resources (I.U.C.N.)- produce RED LIST The Convention on International Trade in Endangered Species-elephants and ivory

22. 17. Endangered Species Act • Signed by President Nixon in 1973 • Protect species from economic growth & development • Overseen by N.O.A.A. and U.S. Fish & Wildlife • Must make list of endangered species • Must protect from human harm • Must prevent projects that jeopardize species • Must create recovery plan

23. Research Endangered Species in your assigned Country Media Center Work: • Monday Nov 26th- Period 11 • Tuesday Nov 27th- Period 4/5 • Come in to class Wednesday with the info on your Endangered Species