The food web around the Antarctic continent -- no food grows on the continent: it's too cold -- exists in the Southern Ocean. This is a short food chain based in krill.
Food in Antarctica is generally called edible.
They are both producers of food
People working and living in Antarctica consume foods delivered to the continent by the logistical means hired by the government that supports the research station.
Animals don't typically have 'problems' as we humans have problems. There are no endangered species breeding on Antarctica's beaches, and the food chain among the animals means that some animals are consumed by other animals as food.
Where there is enough water and food to sustain them. That means everywhere (including the Arctic and Antarctica) but deserts.
There are no spiders on Antarctica: there's no food chain for them there.
There are no animals on Antarctica; there is no food chain there: it's too cold.
A bat looking for food in Antarctica would starve to death, because there is none -- no food chain on the continent.
The productivity of the Southern Ocean is the highest level of productivity of any ocean on earth. This means that whales -- sea mammals -- can easily find food.
you find food by fishing and packing your food.
There is no food chain for land animals on Antarctica, because there are no land animals that live there.
Antarctica is uninhabited; it has no staple food, at least for people. Penguins who live there eat fish.