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How Do Coral Reefs Grow So Slowly?

How Do Coral Reefs Grow So Slowly?

珊瑚礁为什么生长得如此缓慢?

  1. Tiny coral animals build hard skeletons from seawater.
  2. They use calcium and carbon to make limestone.
  3. Each polyp adds just a few millimeters per year.
  4. Warm, clear, shallow water helps them grow best.
  5. Reefs need sunlight for algae living inside them.
  6. Storms or pollution can kill whole sections fast.
  7. Some reefs are thousands of years old today.
  8. That’s why protecting them matters so much now.
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