BLEACHED CORALS CAME BACK TO FULL HEALTH IN SEVEN WEEKS.
A brief tissue bridge moved helpful algae within three days—and recovery continued after the corals were separated.
In a controlled lab experiment, bleached coral fragments that briefly touched healthy genetically identical clones regained full health in seven weeks. Helpful symbiotic algae began crossing the tissue bridge within three days; separated controls did not recover.
WHAT HAPPENED
Researchers paired ten bleached coral fragments with healthy clonal partners. All five physically touching pairs recovered, while all five pairs kept millimetres apart died. Even when two corals were separated after two weeks of contact, recovery continued to the seven-week mark, suggesting that early transfer of algae and nutrients can start a durable rebound.
WHY THIS IS HOPESLOP
Coral bleaching is usually narrated as an irreversible slide. This experiment does not solve mass bleaching, but it reveals a concrete biological handoff that can reverse it under controlled conditions—and gives researchers a sharper target for developing scalable delivery methods.
ORIGINAL SOURCEStanford Doerr School of Sustainability / Science AdvancesRead the original report
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