Gelisols or Cryosols soil type. This type of soil is the kind that lacks nutrients for plants to survive. Plants are an essential part of the food chain. But in tundras, plants have a very simple form, so only certain herbivores can eat them, therefore, certain carnivores will eat the herbivores. So in tundras, the animals and biodiversity is very low.

Food web in the arctic tundra has the predators such as owls, foxes, wolves, and polar bears at the top of the chain. Predators hunt herbivores, plant eating animals, such as caribou, lemmings, and hares.

Animals in tundra need a lot of energy to survive. Tundra animals need to has adapted to this harsh environment.

As an apex predator in the tundra biome, the polar bear needs and eats lots of fat and flesh everyday. Polar bears mainly feed on seals. Polar bear are really reliant to floating ice is because that they need to feed on seals for seal's fat, they convert some parts of fat into energy while others into skin fat, skin fat gives them warmth while swimming in icy cold water.

Animals in the tundra hibernates to minimize energy lost, they often sleep during the worst part of the winter and wakes up in spring. Animals before hibernation often hunts and eats huge amounts of food for their body to store enough energy and wake up at the right time in winter.