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Most of tropical reefs are no longer able to both sustain coral reef ecosystems and the livelihoods of the people who depend on them, as human pressure and the impacts of climate change increase. That was the finding of a new study that looked at 1,800 coral reef sites spread throughout the Indian, Pacific and Atlantic ocean basins. Only 5% of those sites have plentiful fish stocks, high fish biodiversity and grazing, and well-preserved ecosystem functions — which are key marine ecological metrics.
