How does healthy coral reverse bleaching in neighbors?
Stanford University researchers discovered that healthy coral reverses bleaching in neighboring bleached coral by transferring vital symbiotic algae and nutrients through direct physical contact in just one week.
Published in the journal Science Advances, the laboratory study demonstrates that direct physical touch is essential for coral recovery. When placed together, the two coral pieces fuse their tissues to form a nutrient bridge. Laboratory experiments showed that even a few millimeters of separation completely halted the transfer of life-sustaining algae.
What are the implications for coral reef restoration?
While the technique offers a promising emergency method to rescue corals on the brink of death, scientists emphasize that broader environmental threats like fossil fuel emissions must still be addressed.
Marine experts note that while healthy coral reverses bleaching rapidly in controlled settings, scaling this approach across wild, widespread reef systems remains a significant conservation challenge requiring continued research.
