All Helmholtz Centre for Polar and Marine Research articles
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NewsMicroalgae are more significant for carbon dioxide absorption in the Southern Ocean than previously thought
14,000 years ago, algal blooms in the Southern Ocean helped to massively reduce the global carbon dioxide content of the atmosphere – as has now been revealed by new analyses of ancient DNA. Declines in sea ice pose a serious threat to these algae.
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NewsFrozen, but not sealed: algal traces reveal that Arctic Ocean remained open to life during ice ages
For years, scientists have debated whether a giant thick ice shelf once covered the entire Arctic Ocean during the coldest ice ages. Now a new study challenges this idea as the research team found no evidence for the presence of a massive ~1km ice shelf. Instead, the Arctic Ocean appears to have been covered by seasonal sea ice.
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NewsDeep-sea corals are home to previously unknown bacteria with extremely small genomes
Scientists have discovered two highly unusual bacterial species in the tissue of deep-sea corals from the Gulf of Mexico. The previously unknown coral symbionts have an extremely reduced genome and lack the ability to obtain energy from carbohydrates.
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NewsBacteria flourish in plumes of deep ocean volcanoes
Deep down in the ocean at tectonic plate boundaries, hot fluids rise from so-called hydrothermal vents. The fluids are devoid of oxygen and contain large amounts of metals such as iron, manganese or copper. Some may also transport sulphides, methane and hydrogen. Source: HACON cruise 2021, REV Ocean ...