The cloudy, sediment-laden meltwater from glaciers is a key source of nutrients for ocean life, but a new study suggests that as climate change causes many glaciers to shrink and retreat their meltwater may become less nutritious. 

In the marine green alga Codium fragile, unusual carotenoids rapidly dissipate harmful chlorophyll triplet states, protecting the organism from light-induced damage. Using EPR spectroscopy and quantum chemical simulations, the study revealed the structural and electronic principles behind this photoprotection, offering insights for potential bio-inspired solar technologies.

Seaweed species aren’t just crucial parts of marine ecosystems. They also provide numerous health benefits for humans and have been dubbed a superfood. In Biointerphases, an AVS journal published by AIP Publishing, researchers from Oregon State University found yet another use for seaweed as a cheap, vegan, and eco-friendly tissue scaffold. The researchers found that all their seaweed scaffolds had excellent biocompatibility with the cardiomyocytes, showing a promising future for this line of research. Not only will these scaffolds decrease animal testing at the preclinical phase, but they are a cost-effective and eco-friendly alternative to synthetic scaffolds.

Leading maritime engineering specialists, marine ecologists, and biodiversity experts, gathered in Barcelona between 7 and 9 October to officially kick start the project’s vision on climate-resilient coastal landscapes. Hosted by the Maritime Engineering Laboratory from the Polytechnic University of Catalonia, the meeting focused on setting the strategic direction of the project, aligning the scientific, technical and communication objectives and establishing synergies between project partners across Europe and beyond. 

A team of scientists from Chile and the United States discovered dozens of red cusk-eels, fish prized in Chilean seafood markets and celebrated in a poem by renowned Chilean poet Pablo Neruda, embedded in a bushy thicket of tubeworms at a methane seep off the coast of central Chile. This is the first time this commercially important species has been documented using methane seeps as habitat.

A new review led by the MARUM – Center for Marine Environmental Sciences at the University of Bremen – highlights how hydrothermal vents on the seafloor shape iron availability and influence the global oceanic element cycles. The review study, titled “Iron’s Irony,” has been published in Communications Earth & Environment.

Swarms of krill in the Southern Ocean form the second tier of the Antarctic food pyramid, following plant plankton. If stocks were to shrink due to over-intensive fishing, this would incur direct consequences for many animal species that feed almost exclusively on krill. From 20 to 31 October, the annual meeting of the International Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) will take place in Hobart, Australia, where the future regulation of krill fishery will represent a central topic. Prior to this, an international research team headed by Bettina Meyer from the Alfred Wegener Institute presented the sustainable management concept in the scientific journal PNAS, which involves the krill industry in the research and could thereby secure the stocks for the future.

Researchers from the University of Copenhagen have discovered an important phenomenon beneath the Arctic sea ice that was previously thought impossible. This phenomenon could have implications for the food chain and the carbon budget in the cold north.

Some ancient marine organisms produced mysterious magnetic particles of unusually large size, which can now be found as fossils in marine sediments. An international team has succeeded in mapping the magnetic domains on one of such ‘giant magnetofossils’ using a sophisticated method at the Diamond X-ray source. Their analysis shows that these particles could have allowed these organisms to sense tiny variations in both the direction and intensity of the Earth’s magnetic field, enabling them to geolocate themselves and navigate across the ocean. The method offers a powerful tool for magnetically testing whether putative biological iron oxide particles in Mars samples have a biogenic origin.

Climate models suggest that climate change could reduce the Southern Ocean’s ability to absorb carbon dioxide (CO₂). However, observational data actually shows that this ability has seen no significant decline in recent decades. In a recent study, researchers from the Alfred Wegener Institute have discovered what may be causing this. Low-salinity water in the upper ocean has typically helped to trap carbon in the deep ocean, which in turn has slowed its release into the atmosphere – until now, that is, because climate change is increasingly altering the Southern Ocean and its function as a carbon sink. The study is published in the journal Nature Climate Change.