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Northwestern Now Shelled organisms helped buffer ocean acidification by consuming less alkalinity from seawater Gabriella Kitch works with samples from an ocean sediment core. Microscopic fossilized shells are helping geologists reconstruct Earth’s climate during the Paleocene-Eocene Thermal Maximum (PETM), a period of abrupt global warming and ocean acidification that occurred 56 million years ago. Clues from these ancient shells can help scientists better predict future warming and ocean acidification driven by human-caused carbon dioxide emissions.  Led by Northwestern University, the r...

One of the largest ecosystems on Earth lives beneath the seafloor and eats radiation byproducts That's pretty metal! Researchers at the University of Rhode Island’s (URI) Graduate School of Oceanography report that a whole ecosystem of microbes below the sea dines not on sunlight, but on chemicals produced by the natural irradiation of water molecules. Image credits Ely Penner. Whole bacterial communities living beneath the sea floor rely on a very curious food source: hydrogen released by irradiated water. This process takes place due to water molecules being exposed to natural radiation, ...

 E-Mail Credit: Photo courtesy Justine Sauvage NARRAGANSETT, R.I. - February 26, 2021 - A team of researchers from the University of Rhode Island's Graduate School of Oceanography and their collaborators have revealed that the abundant microbes living in ancient sediment below the seafloor are sustained primarily by chemicals created by the natural irradiation of water molecules. The team discovered that the creation of these chemicals is amplified significantly by minerals in marine sediment. In contrast to the conventional view that life in sediment is fueled by products of photosynthesi...