These ecosystems are refuge, nesting areas and feeding zones for manatees, birds, turtles, and crocodiles. Coast lines depend on environmental changes, as sand movements. Beaches change according the sea level and year season.

What threats do beaches face?

• Pollution
• Sedimentation
• Overfishing
• Coral blanching

Dunes are sand hills formed by wind. Dunes help inland from storms and hurricanes. They are home for many species of plants and animals.

What threats do dunes face?

• Introduction of new plants
• Pets
• Buildings
• Sand removal
  

These activities affect the natural balance of the ecosystems. Dunes are threatened by extinction.