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

Admittedly, there are fewer animals that have adapted to live in the harsh, cold weather of the Arctic, thus the food chain is relatively simple compared to most ecosystems. Here is a look at the ...

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

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 ...

Biologists have for the first time shown that amphipods from the warmer Atlantic are now reproducing in Arctic waters to the west of Spitsbergen.

A food web is a sprawling map of ecological connections that combines all the different food chains within an ecosystem. Individual food chains contain primary producers, which derive energy from ...

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

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.

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.

This loss trickles up the food chain, affecting numerous species that rely on these algae for nutrition. The disappearance of ice-algae can have profound implications for the entire marine ecosystem.