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BIODIVERSITY

BIODIVERSITY. Chapter 5 Section 1. Biodiversity. The variety of life in an area that is determined by the number of different species in that area Increases the stability of an ecosystem and contributes to the health of the biosphere Three types of biodiversity: Genetic diversity

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BIODIVERSITY

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  1. BIODIVERSITY Chapter 5 Section 1

  2. Biodiversity • The variety of life in an area that is determined by the number of different species in that area • Increases the stability of an ecosystem and contributes to the health of the biosphere • Three types of biodiversity: • Genetic diversity • Species diversity • Ecosystem diversity

  3. EXTINCTION • When an entire species permanently disappears from the biosphere

  4. Genetic Diversity • The variety of genes or inheritable characteristics that are present in a population • Ladybird beetles: • Body shape • Color • Resistance to disease • Ability to obtain nutrients

  5. http://lancaster.unl.edu/enviro/pest/Articles/asialadybeetle.htmhttp://lancaster.unl.edu/enviro/pest/Articles/asialadybeetle.htm http://www.oisat.org/control_methods/natural_enemies/predators/ladybird_beetles.html http://www.richard-seaman.com/Arthropods/Russia/index.html

  6. Genetic Diversity • Genetic diversity within an interbreeding population increases the chances that some species will survive during changing environmental conditions or during disease outbreak

  7. Species Diversity • The number of different species and the relative abundance of each species in a community http://people.eku.edu/ritchisong/birdbiogeography1.htm

  8. Ecosystem Diversity • The variety of ecosystems that are present in the biosphere • Includes biotic factors and abiotic factors

  9. Importance of Biodiversity • Humans work to preserve and protect species on Earth for the future. • Reasons to preserve life on Earth: • Economic • Aesthetic • Scientific

  10. Direct Economic Value • Humans depend on plants and animals to provide food, clothing, energy, medicine and shelter • Also important to preserve the genetic diversity in species that are not used directly; may serve a purpose in the future • Most of the worlds food sources come from a few species, very little genetic diversity, may need to use other species in the future to strengthen food sources

  11. Direct Economic Value • Genetic engineering is used to strengthen plants for increased nutritional value, resistance to insects and disease, • If a species becomes extinct its value is lost • Benefits (current or future) are also lost is a species becomes extinct

  12. Indirect Economic Value • A healthy atmosphere provides many services to all organisms • Examples: plants provide Oxygen and get rid of Carbon Dioxide; Natural process clean water to make it safe for drinking; etc • No exact value to a healthy ecosystem but can be priceless

  13. Aesthetic and Scientific Value • Aesthetic Value: the beauty of an ecosystem • Scientific Value: knowledge to be gained from an ecosystem http://www.squidoo.com/yellowstone-national-park-pictures-for-sale

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