Bioluminescence, the ability of organisms to produce light through chemical reactions, may have appeared 540 million years ago in deep-sea corals.
Some coral species have 8 chambers (Octocorallia). Image: NOAA
Scientists at the Smithsonian National Museum of Natural History discovered that a group of marine invertebrates that existed 540 million years ago may have been the first animals to bioluminescent, about 300 million years earlier. years than previously thought, Independent reported on May 23. New research published in the journal Proceedings of the Royal Society B Biological Sciences.
Bioluminescence is the ability of living organisms to produce light through chemical reactions. Previously, scientists believed that this ability appeared as early as about 267 million years ago, in a group of small marine crustaceans called Clams.Ostracoda). Bioluminescence has evolved independently at least 94 times in nature and is involved in a variety of behaviors such as camouflage, courtship, communication, and hunting.
“No one clearly knows why this ability began to develop in animals,” said Andrea Quattrini, coral curator at the Smithsonian National Museum of Natural History and senior author of the study. shall.
“We wanted to find out when bioluminescence appeared and eight-chambered corals (Octocorallia) are one of the oldest groups of animals on the planet that can bioluminescent. So the question is when did they develop this ability? "said Danielle DeLeo, lead author of the new study.
Together with expert Catherine McFadden from Harvey Mudd College, Quattrini completed a detailed evolutionary map of eight-chambered corals in 8, using data from 2022 species. Based on fossil dating and many statistical methods, the research team found that, 185 million years ago, the common ancestor of eight-chambered corals was most likely bioluminescent. Over a long period of time, today's eight-chambered corals still have thousands of species with relatively high rates of bioluminescence, suggesting that this ability plays an important role in their success.
“Our research reveals the oldest known case of bioluminescence on Earth, twice as long as the previous one. Our findings support the notion that bioluminescence, and light signaling in general, is one of the earliest forms of communication on the planet. We now know that bioluminescence is an important form of communication for many animals, especially those in the deep sea,” DeLeo said.
Thu Thao (Follow Independent)
