Lesson 15 - Rising Temperatures: Oceans

Question 1

What are the main threats to ocean health?

Answer 1

Temperature
Salinity
Acidification
Changes to currents

Question 2

What are the main implications of coral reef degredation?

Answer 2

Loss of culture
Loss of leisure
Reduced coastal protection
Reduced biodiversity

Question 3

What are the projections for reef damage by 2050?

Answer 3

50% suffer severe bleaching
Transition to net erosion

Question 4

What is the global value of coral reefs?

Answer 4

Estimated $9.6 billion
Tourism, recreation etc
Benefits 100+ nations

Question 5

How will reef degradation affect developing nations?

Answer 5

Reduced natural coastal defence
Lower marine productivity
Loss of tourist industry

Question 6

What % of marine species are sheltered by reefs?

Answer 6

25%

Question 7

How many people rely on fisheries as primary food + income sources?

Answer 7

520 million

Question 8

How + why may many marine species migrate?

Answer 8

Poleward shifts
Access colder waters