Great Barrier Reef Decline Quiz

What is the main cause of coral decline in the Great Barrier Reef?

• Oil spills

• Overfishing

• Climate change

• Tourism

Which coral species has been partly responsible for the reef's recovery?

• Porites

• Acropora

• Brain coral

• Elkhorn coral

What does the loss of hard coral cover indicate?

• Increase in fish population

• Percentage of live coral on the reef’s surface

• Improvement in water quality

• Decrease in water temperature

Which two factors bring on coral spawning?

• High tides and storms

• Full moon and warm waters

• Low tides and rain

• Cold waters and pollution

How could coral spawning help build resilient reefs for the future?

• By preventing cyclones

• By reducing water pollution

• By passing on heat-tolerant genes

• By increasing fish population

What percentage of coral cover was lost in one part of the Cooktown-Lizard Island reef?

• 25%

• 50%

• 75%

• 10%

What is the role of algae in coral reefs?

• To provide shelter for fish

• To attract tourists

• To produce nutrients for coral

• To clean the water

What happens to coral when it expels its algae?

• It becomes stronger

• It grows faster

• It turns blue

• It turns white (bleaching)

Which natural events have also affected the health of the coral?

• Cyclones and pollution

• Tsunamis

• Volcanic eruptions

• Earthquakes

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