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Diversity

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Diversity

  1. 1. Notes: Diversity (pg 16)
  2. 2. Notes: Diversity (pg 16)• Species Richness = The number of species in a community
  3. 3. Notes: Diversity (pg 16)• Species Richness = The number of species in a community• Species Evenness = measures how equal the species in a community are numerically
  4. 4. Notes: Diversity (pg 16)• Species Richness = The number of species in a community• Species Evenness = measures how equal the species in a community are numerically• Species Diversity = The number and relative abundance of species in a community (includes richnessANDevenness)
  5. 5. Biodiversity• The total of all the genetically based variation in all organisms in the biosphere
  6. 6. Biodiversity• The total of all the genetically based variation in all organisms in the biosphere• Why should we be concerned about preserving biodiversity?1. Medicine: Plant species are the source of many new medicines
  7. 7. Biodiversity• The total of all the genetically based variation in all organisms in the biosphere• Why should we be concerned about preserving biodiversity?1. Medicine: Plant species are the source of many new medicines2. Agriculture: Wild relatives of crops can have genes for pest or disease-resistance
  8. 8. Biodiversity• The total of all the genetically based variation in all organisms in the biosphere• Why should we be concerned about preserving biodiversity?1. Medicine: Plant species are the source of many new medicines2. Agriculture: Wild relatives of crops can have genes for pest or disease-resistance3. Ecosystem Services: Healthy and diverse ecosystems help maintain soil, water, and air quality
  9. 9. Keystone Species• Play a key role in maintaining the diversity and structure of an ecosystem
  10. 10. Keystone Species• Play a key role in maintaining the diversity and structure of an ecosystem• Example: Sea otter. Eats sea urchins, which allows kelp forests to grow. Many species of fish and other animals live in the kelp forest

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