Earliest Evidence of Coral-Algae Symbiosis Discovered in 385-Million-Year-Old Fossils

Researchers have found geochemical proof of photosymbiosis in ancient Devonian corals, offering insights into early reef ecosystems.

Scientists from the Max Planck Institute and other institutions used nitrogen isotope analysis to identify photosymbiosis in ancient corals.
The study analyzed fossilized corals from the Eifel and Sauerland regions, revealing symbiotic relationships dating back 385 million years.
Photosymbiosis allowed ancient coral reefs to thrive in nutrient-poor environments by recycling scarce nutrients through algae.
The research provides the oldest confirmed geochemical evidence of coral symbiosis, predating modern reef-building corals by millions of years.
The findings could enhance understanding of ancient nutrient cycles and offer insights into the resilience of contemporary coral ecosystems.