Chronic Ocean Heating Fuels 'Staggering' Loss of Marine Life, Study Finds
Source: Slashdot
Chronic ocean heating is fuelling a “staggering and deeply concerning” loss of marine life, according to a recent study1. Researchers examined year‑to‑year changes in 33,000 populations across the northern hemisphere from 1993 to 2021 and isolated the effect of the decadal rate of seabed warming from short‑term events such as marine heatwaves. They found that fish biomass can drop by 7.2 % for every 0.1 °C of warming per decade, with declines as high as 19.8 % in a single year linked to chronic heating.
“To put it simply, the faster the ocean floor warms, the faster we lose fish,” said Shahar Chaikin, a marine ecologist at the National Museum of Natural Sciences in Spain and the study’s lead author. “A 7.2 % decline for every tenth of a degree per decade might sound small, but compounded over time, across entire ocean basins, it represents a staggering and deeply concerning loss of marine life.”
Footnotes
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Study: Chronic ocean heating fuels staggering loss of marine life – DOI: 10.1038/s41559-026-03013-5 (Guardian report: https://www.theguardian.com/environment/2026/feb/25/chronic-ocean-heating-fuels-staggering-loss-marine-life-study) ↩