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Chapter 5 Biodiversity & Conservation

Chapter 5 Biodiversity & Conservation. Biodiversity is the variety of life in an area that is determined by the total number of different species. A lot of different species means a lot of biodiversity. Biodiversity is good for the environment

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Chapter 5 Biodiversity & Conservation

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  1. Chapter 5Biodiversity & Conservation

  2. Biodiversity is the variety of life in an area that is determined by the total number of different species. • A lot of different species means a lot of biodiversity. • Biodiversity is good for the environment • An ecosystem with biodiversity is a healthy one because it means that it is in balance and can support a lot of different organism The two areas with the greatest biodiversity are the rainforest & coral reefs.

  3. Biodiversity is good for humans because we get many different products from many different organisms. • Food: meat, eggs, milk, veggies • Medicine: penicillin • Clothing: cotton & hemp • Wood: lumber & paper • Oxygen: from plants • Protection: erosion, floods, good soil • Balanced ecosystems with biodiversity looks nice!

  4. Extinction (when a species is eliminated)  causes a decreasein biodiversity. Organisms have always naturally gone extinct BUT humans are causing them to go extinct MUCH faster by destroying the habitats organism live in… • Bulldozing land to make houses, roads & buildings • Polluting the land, water and air • Chopping down forests for wood & paper • Poaching animals

  5. LOSS OF BIODIVERSITY: • EXTINCT = the disappearance of a species when the last member dies • ENDANGERED = when numbers of a species become so low that extinction is possible.

  6. THREATENED = when a species is likely to become endangered • threatened  endangered  extinct

  7. Threats to Biodiversity • Habitat destruction / loss  • One of the biggest threats! • Ex. clearing the Amazonian rainforest for farming and for firewood • Habitat fragmentation  • The separation of wilderness areas from other wilderness areas • This creates “islands” of habitat

  8. Habitat degradation  • Damage to a habitat caused by air, water, or land pollution • Ex. Air pollution causes acid rain

  9. Ex. Air pollution has damaged the ozone layer, which blocks UV radiation • leads to more skin cancer

  10. Ex. Air pollution causes the GreenhouseEffect, which leads to global warming

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