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Chapter 10

Chapter 10. BIODIVERSITY : the number of different species in an identified area. 10.1: What is Biodiversity? (AV!). Describe the diversity of species types on Earth, relating the differences between known numbers and estimated numbers List and describe three levels of biodiversity

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Chapter 10

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  1. Chapter 10 BIODIVERSITY: the number of different species in an identified area.

  2. 10.1: What is Biodiversity? (AV!) • Describe the diversity of species types on Earth, relating the differences between known numbers and estimated numbers • List and describe three levels of biodiversity • Explain four ways in which biodiversity is important to ecosystems and humans • Analyze the potential value of a single species • **Think about the monarch butterfly article as well as sea otters in the text

  3. To Know or Not to Know??? • Importance: understanding and preservation of different species…for our own survival! • Cataloging all known species: >10 million different species • greatest # = …? • fewest # = …? • Known: collected and significantly described; named. • Unknown: estimated; exist in remote wildernesses, deep in the oceans (extremely unexplored), and even in cities!

  4. 3 Levels • Species diversity: # of different sp. in an area; “biodiversity” • Ecosystem diversity: the variety of habitats, communities, and ecological processes w/i and btwn. ecosystems • Genetic diversity: all the different genes contained w/i all members of a population. --gene: piece of DNA, codes for a trait, heritable.

  5. Ways in Which Biodidersity is Impt. • Health of ecosystems; species are all a part of the biogeochemical cycles; inter-/intra-dependence of species; food webs --keystone species: species that are critical to the stability of an entire ecosystem; ex. Sea otters (sea otters down due to hunting/fur trade, sea urchins up due to loss of predator, loss of sea kelp…base of the food web!!!)

  6. Survival of species and populations -- > genetic diversity = increased chance that some members within a population will survive --bottleneck image pg. 261 3. Ethics, Aesthetics, and Recreation --conservationists, environmentalists, PETA, etc. --ecotourism, $$ --natural beauty!

  7. 4. Medical, Industrial, Agricultural uses --1/4 of the drugs prescribed within the US are plant derived. --nearly all antibiotics are derived from chemicals found in fungi --the scientific community continues to find new uses for biological material (products!) --FOOD!!

  8. HW…due tomorrow!!! • 10.2 and 10.3 study guide questions answered • Submit online/email: mmahar@gulllakecs.org

  9. 10-2: • Define and give examples of endangered and threatened species • Describe several ways that species are being threatened with extinction globally • Explain which types of threats are have the largest impact on biodiversity • List areas of the world that have high levels of biodiversity and many threats to species • Compare the amount of biodiversity in the United States to that of the rest of the world

  10. 10-3: • List and describe the four types of efforts to save individual species • Explain the advantages of protecting entire ecosystems rather than individual species • Describe the main provisions of the Endangered Species Act • Discuss ways in which efforts to protect endangered species can lead to controversy • Describe three examples of world-wide efforts to prevent extinction

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