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Example of Student Collaboration PowerPoint



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  • 1. Coral Reef Destruction By: Mark Jackson & Daniel Holmes
  • 2. What is a Coral Reef?• A coral reef is a “reef” made up of layers that develop of thousands of years. – Layers are made of “calcium carbonate”
  • 3. • Coral reefs are found off the coasts of about 100 countries.• Coral reefs are home to about 25% of all marine life.• Among the most fragile and endangered ecosystems.• Over the last few decades 35 million acres of coral reefs have been destroyed. – Reefs off of 93 countries have been damaged.
  • 4. • If the present rate of destruction continues 70% of all coral reefs will be destroyed.• As of now 2/3 of coral reefs are dying. – 10% cannot be recovered.
  • 5. Causes of damage• High temperature• Ultra violet light• Pollution by humans• Destruction for industrial purposes• Or other environmental changes. – This causes them to loose there symbiotic algal cells. – This is called coral bleaching
  • 6. Importance of Coral Reefs• Coral reefs effect humans and organisms as shown in figure1.
  • 7. Figure 1 Coral is destroyed Certain organisms Will die because Of loss of shelter Cannot harvest Organisms for Food sourceMany coastal Communities Depend on coral Reefs for food Sources and Trade. Economy is weakened
  • 8. Who does Coral Destruction Effect?• Coastal Communities are effected greatly. – Coral reefs protect them from wave and storm damage. – Provides people throughout the world with new medicines.
  • 9. Pictures of Coral Reef Destruction
  • 10. EarthKam PicturesThis picture was taken January 30, 1998 (orbit # 112)
  • 11. Orbit number.(1950)
  • 12. Resources••