Death Of Coral Reefs
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Death Of Coral Reefs

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    Death Of Coral Reefs Death Of Coral Reefs Presentation Transcript

    • Power Point by Sharon and Rita
    • Pretty isn’t it?
    • Not so much anymore
    • What are coral reefs?
      • coral reefs have been around us for more than 400 million years
      • Coral are extremely ancient animals that evolved into reef-building forms over the last 25 million years
      • There are two main types of coral:
        • The hard coral, the major reef-building species
        • The soft coral, such as sea whips and sea fans.
    • How are they made?
      • They are aragonite structures produced by living organisms.
      • coral reefs are formed by the aggregation of the calcium carbonate exoskeletons of corals
    • What are the threats?
      • Human activity is one of the greatest threats.
      • Other threats are:
        • Global warming
        • coral mining
        • pollution
        • over-fishing
        • blast fishing
    • The Threat of Human Destruction
      • Coral is damaged by anchors
      • Blast fishing will kill coral reefs
      • This is due to inappropriate fishing techniques
    • The Threat of Seaweed
      • Corals overgrown by seaweed
      • Caused by:
        • Over-fertilization
        • Sewage
        • Agriculture
    • The Threat of Coral Bleaching
      • Coral turns white
      • This is due to:
        • High temperatures
        • Climate Change
    • What happens to dead reefs?
      • They become white in colour and collapse
      • It deprives fish of food
      • Fish diversity is cut in half
    • How to Help
      • Install Moorings
      • Remove nutrients from sewage
      • More efficient ways to fertilize
      • Reduce green house gasses
    • Thank you for watching