Topic:Threats to the Great Barrier Reef , should be three sub-topic from these references

1- Climate Change Action Plan GREAT BARRIER REEF 2007 2012

2-Effects of different disturbance types on butterflyfish communities ofAustralia’s Great Barrier Reef

3- GREAT BARRIER REEF OUTLOOK REPORT 2009 4-Munday_et_al._2007_GBR_Fishes_&_Climate_Change.

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