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Coral reefs, the world's most productive and diverse marine ecosystems, rely on a masterful recycling system to stay healthy. Corals and algae release nutrients that support a complex and efficient reef food chain. But when the system gets out of whack, the cycle breaks down and endangers the reef's health. A new study explores how a process called microbialization destroys links in this delicate food chain. [Source: National Science Foundation]
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