A polar bear decline could trigger what biologists call a “trophic cascade,” or a complete uncoupling of the Arctic food chain.

The Arctic's shrinking sea ice is reshaping the region's food web from the bottom up, a new study reports. Historically, tiny plantlike organisms called phytoplankton burst into bloom in the ...

Atlantic cod normally live in the Atlantic Ocean, as the name suggests. But one research team got a surprise when they pulled several from Arctic waters. Here's what this means for the Arctic ...

Toxic tides: Centuries-old mercury is flooding the arctic food chain New Danish research reveals ocean currents as a major source of mercury contamination in the Arctic Date: June 13, 2025 Source ...

The algae Melosira arctica is the foundation of the food chain, and its contamination could have major consequences for ecosystems and the climate.

Dead and dying seabirds collected on the coasts of the northern Bering and southern Chukchi seas over the past six years reveal how the Arctic's fast-changing climate is threatening the ecosystems ...

A food web is a sprawling map of ecological connections that combines all the different food chains within an ecosystem.

The dovekie (Alle alle) is key to the Arctic ecosystem: It fertilizes the land and is a food source for many other species. Its decline ripples through the plant world and up the food chain.

However, climate change is not only upending Arctic ecosystems but also threatening traditional Inuit food sources and the well-being of Inuit people.

"Mercury builds up in the food chain over time, and continued exposure, even at low levels, can have serious health consequences," said The Independent.

Algae is important to the food chain in the Arctic, however too much can have negative effects on the ecosystem. There are concerns about the long-term impacts.