A research team has used nitrogen isotope analysis to demonstrate that 385 million years old corals from the Eifel and Sauerland regions had symbionts. This finding represents the earliest evidence of photosymbiosis in corals. Photosymbiosis might explain why ancient coral reefs grew to massive sizes despite being in nutrient-poor environments.
A research team led by researchers from the Max Planck Institute for Chemistry in Mainz has used nitrogen isotope analysis to demonstrate that 385 million years old corals from the Eifel and Sauerland regions had symbionts. This finding represents the earliest evidence of photosymbiosis in corals. Photosymbiosis might explain why ancient coral reefs grew to massive sizes despite being in nutrient-poor environments.
A research team led by researchers from the Max Planck Institute for Chemistry, the Goethe University Frankfurt, and the Senckenberg Research Institute and Natural History Museum Frankfurt has now demonstrated, using nitrogen isotope analyses, that some extinct corals from the Middle Devonian period were already symbiotic. This represents geochemical evidence of the oldest confirmed photosymbiosis in corals.
To this end, the researchers analyzed freshly collected fossil corals from the Sauerland, and museum specimens from the Eifel, the Western Sahara, and Morocco from the collection of the Senckenberg Research Institute and Natural History Museum Frankfurt. The study serves as the start for a more detailed investigation into the nutrient cycle of the Paleozoic era, which includes the Devonian. The method aids in understanding the extent to which the mass extinction of corals and other reef inhabitants towards the end of the Devonian period is connected to ocean nutrient levels.
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