Marine Conservation

How old are most coral reefs?

• 10,000 – 15,000 years
• 5,000 – 10,000 years
• 1,000 – 5,000 years
• Over 5 million years

Coral reefs cover less than 1% of the Earth’s ocean surface. What percentage of marine species rely on reefs at some point in their lives?

• 33%

• 12.5%

• More than 50%

• 25%

Which is NOT the best condition for coral growth?

• sea water temperature 20℃ - 28℃

• in shallower water not more than 40m

• where the sunlight can reach

• in deeper water 100m where sunlight cannot reach

What is the biggest benefit gained from coral reefs?

• Tourism

• Seafood

• Habitat

• Coastal Protection

What threatens and causes the most damage to coral reefs?

• Large whales
• Boats
• Humans
• Large schools of fish

Coral reefs provide all of the following benefits EXCEPT

• Protection against storm waves
• Medicinal substance for pharmaceutical industry
• Provide businesses in coral mining
• A source of food and livelihood

What is coral bleaching?

• When corals are affected by chemically polluted seawater
• When coral gets sick and eventually die
• When zooxanthellae leave the corals and left them colorless
• When the coral turns white during spawning

After corals have bleached

• They never recover
• They will recover only if there are enough nutrients
• They can recover if they are of the right genetic form
• They can recover if temperatures return to normal

Which of the following action is NOT the best way to protect coral reefs?

• Creating artificial reefs to protect coasts

• Reducing the use of plastic product

• Minimizing human traffic and activities on coral reefs

• Laws and regulations to make coral reefs protected areas

What estimated percentage of our reefs will be destroyed by year 2050?

• 60%

• 55%

• 90%

• 38%