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Too much algae -- and too many microbes -- threaten coral reefs

Fish swimming by a healthy coral reef in the Line Islands in the central Pacific Ocean.

A healthy coral reef in the Line Islands in the central Pacific Ocean.

Credit: Brian Zgliczynski


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A degraded reef full of fleshy algae in the Line Islands.

A degraded reef dominated by fleshy algae in the Line Islands.

Credit: Jennifer Smith


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Scientist diving to collect microbial samples

Scientist Forest Rohwer collecting microbial samples for further study.

Credit: Zafer Kizilkaya


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Fleshy algae may soon smother this otherwise healthy coral reef.

Fleshy algae may soon smother this otherwise healthy coral reef.

Credit: Jennifer Smith


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A team of divers descending to survey and sample a reef for microbes.

A team of divers descending to survey and sample a reef for microbes.

Credit: Jennifer Smith


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Coral with and without fleshy algae.

Coral slowly being overgrown by fleshy algae.

Credit: Jennifer Smith


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