NSW

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A Pacific Ocean coral island, populated around 40 years ago, reveals how human settlement can quickly degrade water quality and affect the health of coral reefs, Sydney scientists say.

Jessica Carilli, of the Australian Nuclear Science and Technology Organisation, and Sheila Walsh, of the Nature Conservancy, used Kirimati Island to examine the shells made by an organism that thrives in high-nutrient conditions, which is considered detrimental to coral.

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