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flag Coral reefs regulate daily microbial rhythms, reducing bacteria and microalgae through grazing, with activity peaking midday and at night, according to a Red Sea study.

flag A new study finds coral reefs actively regulate daily microbial rhythms in nearby waters, reducing bacteria and microalgae through grazing and predation. flag Researchers in the Red Sea’s Gulf of Aqaba tracked microbes every six hours, discovering that microbial activity peaks at specific times of day—especially midday for coral symbionts—often more strongly than seasonal shifts. flag Nighttime increases in microscopic predators were also observed. flag The findings, published in Science Advances, suggest monitoring these daily cycles could help assess reef health amid environmental change.

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