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Review 10.1. What is Biodiversity? 3 levels of biodiversity? Define Keystone species – otters? Why is genetic diversity important? Human uses of organisms? What is ecotourism?. 10.2 Biodiversity at Risk. Unscramble key terms. Extinction. Extinction has increased since 1800. - PowerPoint PPT Presentation
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Review 10.1
• What is Biodiversity?• 3 levels of biodiversity?• Define Keystone species – otters?• Why is genetic diversity important?• Human uses of organisms?• What is ecotourism?
10.2 Biodiversity at Risk
Unscramble key terms
Extinction
• Extinction has increased since 1800. • Predict b/t 1800 and 2100 25% of all species on
Earth may become extinct.• A species that is likely to become extinct if not
protected is gereddanen __________________.• A species that is declining and likely to become
endangered if not protected is called netedreath_________________________.
How does extinction happen
• Habitat destruction • Invasive species• Hunting• Illegal hunting chpaoing _______________• Pollution
Critical biodiversity
• Ecologists often use the number of native plants as an indicator of overall biodiversity.
• Native plants and animals only found in a limited area are known as demicen___________________.
• Critical areas:• Tropical rain forests• Coral reefs and coastal ecosystems• Islands
Hotspots
• Spotshot___________________are the most threatened areas of high species diversity on Earth.
• US hotspots– Everglades– California coast– Hawaii– Midwest prairies– Pacific Northwest forests.
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