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Biodiversity: Who cares?

Biodiversity: Who cares?. Limiting Factors and Carrying Capacity. Populations will continue to grow until some limiting factors are imposed Limiting factors limit the growth of populations and the number of species in an eosystem Food Water Shelter Space

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Biodiversity: Who cares?

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  1. Biodiversity: Who cares?

  2. Limiting Factors and Carrying Capacity • Populations will continue to grow until some limiting factors are imposed • Limiting factors limit the growth of populations and the number of species in an eosystem • Food • Water • Shelter • Space • Carrying capacity of a particular environment is the total number of individuals that the area can hold

  3. Chemical Cycling • Nutrient cycles-cycling of essential nutrients • involve both abiotic and biotic components of an ecosystem • Water, Carbon, Nitrogen, Phosphorus

  4. Which is more diverse? B A

  5. Which is more diverse? B A

  6. B A Which is more diverse?

  7. B A Which is more diverse?

  8. Which has more cultural diversity? B A

  9. Which has more biodiversity? A B

  10. Which has more biodiversity? A B

  11. What do you think biodiversity means?

  12. Biodiversity What does “Bio” mean? Life Bio =

  13. Biodiversity What does “Diversity” mean? Diversity = Variety

  14. Scientists have identified more than 2 million species. • Tens of millions -- remain unknown • The variety of life on Earth is made possible by complex interactions among all living. Biodiversity is the variety of life in an area or on Earth

  15. Biodiversity Measured by the number of species in an area Golden Skimmer Meadow Beauty Saki Monkey

  16. Threats to biodiversity Loss of Habitat Pollution Species Introductions Global Climate Change Exploitation

  17. Should we be concerned about biodiversity? What we know:The Earth is losing species at an alarming rate • Some scientists estimate that as many as 3 species per hour are going extinct and 20,000 extinctions occur each year. • When species of plants and animals go extinct, many other species are affected.

  18. Population & species level conservation • Biodiversity hot spot: small area with an exceptional concentration of species • Endemic species: species found nowhere else • Endangered species: organism “in danger of extinction” • Threatened species: likely to become endangered in the foreseeable future • Bioremediation: use of living organisms to detoxify polluted systems

  19. Human Impact • Biological magnification: trophic process in which retained substances become more concentrated at higher levels • Greenhouse effect: warming of planet due to atmospheric accumulation of carbon dioxide • Ozone depletion: effect of chlorofluorocarbons (CFC’s) released into the atmosphere • Habitat destruction

  20. What do we get from biodiversity? • Oxygen • Food • Clean Water • Medicine • Aesthetics • Survival

  21. Conservation Biology A branch of biology that focuses on the preservation of biodiversity • Preservations • Rescue programs • Resource conservation • Reintroduction programs

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