Key Idea Island Impacts: Climate changes affecting coastal and marine ecosystems will have major implications for tourism and fisheries.

Coral reefs are particularly sensitive to the impacts of climate change as even small increases in water temperature can cause coral bleaching. Ocean acidification due to rising carbon dioxide levels poses an additional threat to coral reefs and the rich ecosystems that they support. Fisheries feed island people and island economies. Nearly 70 percent of the world's annual tuna harvest comes from the Pacific Ocean. Climate change is projected to cause a decline in tuna stocks and an eastward shift in their location.


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