Download - Death Of Coral Reefs
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Power Point by Sharon and Rita
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Pretty isn’t it?
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Not so much anymore
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What are coral reefs?coral reefs have been around us
for more than 400 million years
Coral are extremely ancient animals that evolved into reef-building forms over the last 25 million years
There are two main types of coral:
- The hard coral, the major reef-building species
- The soft coral, such as sea whips and sea fans.
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How are they made?
They are aragonite structures produced by living organisms.
coral reefs are formed by the aggregation of the calcium carbonate exoskeletons of corals
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What are the threats?Human activity is one of the
greatest threats.
Other threats are:– Global warming – coral mining – pollution – over-fishing – blast fishing
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The Threat of Human Destruction
Coral is damaged by anchors
Blast fishing will kill coral reefs
This is due to inappropriate fishing techniques
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The Threat of Seaweed
Corals overgrown by seaweed
Caused by:– Over-fertilization – Sewage– Agriculture
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The Threat of Coral Bleaching
Coral turns white
This is due to:– High temperatures– Climate Change
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What happens to dead reefs?They become white in
colour and collapse
It deprives fish of food
Fish diversity is cut in half
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How to HelpInstall Moorings
Remove nutrients from sewage
More efficient ways to fertilize
Reduce green house gasses
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Thank you for watching