An irreversible shift in the chemical make-up of the Arctic Ocean driven by climate change is disrupting the region’s food chain, a study suggests.
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Researchers have found that the accelerated melting of Arctic sea ice has led to a sharp decline in the levels of the key nutrient nitrate, disrupting the food chain and impacting the populations of plankton, fish, seabirds, and marine mammals. Analysis shows that large areas of shallow sea previously covered by ice are now exposed to sunlight, further exacerbating the problem.