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Coral Reefs PowerPoint Presentation
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Coral Reefs

Coral Reefs

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Coral Reefs

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Presentation Transcript

  1. Coral Reefs

  2. Facts about Coral Reefs • Largest living thing on Earth • Covers less than 1% of the Earth’s Surface • Needs sunlight to grow

  3. Did You Know? • Coral are animals • Plants live inside of them • Two kinds • Soft corals • Hard corals (These build reefs!) • Made of tiny polyps

  4. Coral Reefs- Underwater structures made from calcium carbonate secreted by corals Types of Reefs

  5. Fringing Reefs • Grow close to shore • Shallow lagoon or no lagoon at all • Encounter coastal development and pollution because of being on the Island

  6. Barrier Reefs • Parallel to the shore • Separated by a wide lagoon with deep portions • Example: Great Barrier Reef • Largest barrier reefs develop on edges of continental shelves

  7. Atoll Reefs • Circular reef surrounding a large, deep central lagoon • Common in Indo-Pacific region • 100 miles in diameter

  8. Benefits to the Environment • Used for food and medicine • Economic benefits (tourism, jobs and food) - $375 billion a year • Breeding grounds for marine animals (fish) • Protects shores from waves and storms • Home & shelter to 25% of the fish in the ocean

  9. Major Threats to Coral Reefs • Ocean Water Pollution- oil, pesticides, and sewage contaminate the oceans • Global Warming- Increase in carbon dioxide leads to rise in ocean water temp • Bleaching- Algae that lives with the coral are sensitive to temperature. • Leave coral behind when too warm • Color disappears • Coral becomes a white “dead looking coral”

  10. Bleaching

  11. Threats (Continued) • Human Activities - Dropping of boat anchors - Lobster traps - Fishing line - Fishing nets • We are in danger of losing 70% of the World’s Coral Reefs in the next 50 years.

  12. What can WE do to save Coral Reefs? • Reduce Pollution - Reduce, Reuse , and Recycle, to eliminate negative impacts of pollution on health of oceans • Walk, bike or ride the bus • Conserve water: Less water we use, less wastewater that finds its way into oceans.

  13. Every simple thing you do to help save coral reefs makes a difference!