An irreversible shift in the chemical makeup of the Arctic Ocean driven by climate change is disrupting the region's food chain, a study suggests. Widespread loss of Arctic sea ice has led to a sharp ...

Researchers have measured toxins in scat samples from 205 bowhead whales from the Beaufort Sea, collected over 19 years, and found that algal toxin concentrations changed with ocean temperatures, the ...

Researchers say the Arctic Ocean crossed a biological tipping point in 2009, when nitrate levels in the water suddenly started dropping due to a drastic reduction in sea ice extent.

Disappearing sea ice is letting more sunlight in the Arctic Ocean and boosting phytoplankton growth, but this has depleted a crucial nutrient, which could severely affect animals higher up the food ch ...