Threats to Coral Reefs Natural and Human.

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Presentation transcript:

Threats to Coral Reefs Natural and Human

Threats from Nature Unusually strong waves such as those from a hurricane Water temperature changes Dramatic changes in saltiness of water Predators, such as snails and crown of thorns starfish Overgrowth of algae

Coral-eating Snails

Crown of Thorns Starfish

Threats from Humans Pollution Power plants Sediments block light from zooxanthellae Chemicals either poison corals or allow too much algae to grow Power plants Filter water and kill fish and plankton Releasing hot water kills organisms

Pollution

Power Plants

More Threats from Humans Deforestation Causes erosion which clouds the water Burning of trees could be a factor in climate change Destructive fishing Blasting with dynamite Cyanide poison Boats running aground, anchors Overfishing

It’s up to Us to Save Coral Reefs                                       Be Responsible.

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