IGCSE Geography: Marine Processes: Coral Reefs

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IGCSE Geography: Marine Processes: Coral Reefs

  1. 1. Coral Reefs
  2. 2. What is coral?
  3. 3. What is coral?It is a limestone rock made up of the skeletons of tinymarine organisms called coral polyps.
  4. 4. What is coral?It is a limestone rock made up of the skeletons of tinymarine organisms called coral polyps.They are animals related to sea anemones which exist inlarge colonies.
  5. 5. What is coral?It is a limestone rock made up of the skeletons of tinymarine organisms called coral polyps.They are animals related to sea anemones which exist inlarge colonies.As they die they leave behind a hard skeleton consisting ofcalcium carbonate which appears like rock.
  6. 6. The coral polyps are carnivorous using tentacles to stingand kill tiny zooplankton.
  7. 7. The coral polyps are carnivorous using tentacles to stingand kill tiny zooplankton.They are also nourished by minute, single-celled plantscalled zooxznthellae that live within the coral tissue anduse sunlight to manufacture food for themselves and thecoral.
  8. 8. What is a coral reef?
  9. 9. What is a coral reef?An accumulation of coral formed around the edges oflandmasses under certain conditions.
  10. 10. What are the necessary conditions for coralgrowth?
  11. 11. What are the necessary conditions for coralgrowth?Sea temperature of not less than 21ºC (30 ºN - 30ºS)
  12. 12. What are the necessary conditions for coralgrowth?Sea temperature of not less than 21ºC (30 ºN - 30ºS)Maximum 30-40m from the sea surface – the need for sunlight.
  13. 13. What are the necessary conditions for coralgrowth?Sea temperature of not less than 21ºC (30 ºN - 30ºS)Maximum 30-40m from the sea surface – the need for sunlight.Clear oxygenated water.
  14. 14. What are the necessary conditions for coralgrowth?Sea temperature of not less than 21ºC (30 ºN - 30ºS)Maximum 30-40m from the sea surface – the need for sunlight.Clear oxygenated water.Plentiful supply of microscopic zooplankton.
  15. 15. What are the necessary conditions for coralgrowth?Sea temperature of not less than 21ºC (30 ºN - 30ºS)Maximum 30-40m from the sea surface – the need for sunlight.Clear oxygenated water.Plentiful supply of microscopic zooplankton.Not fresh or silt-laden water.
  16. 16. What are the necessary conditions for coralgrowth?Sea temperature of not less than 21ºC (30 ºN - 30ºS)Maximum 30-40m from the sea surface – the need for sunlight.Clear oxygenated water.Plentiful supply of microscopic zooplankton.Not fresh or silt-laden water.Eastern sides of land masses – warm currents.

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