phitoplankton
There is no food web in Antarctica's ice sheets, cap or glaciers.
There is no food web on the Antarctic continent: it's too cold there to sustain one..
Each step in a food chain or food web. Autotroph are always trophic level 1.
The dominant herbivors in the Antarctic food web is indeed krill.
A food web consists of several components; primary producers, primary consumers, secondary consumers, tertiary consumers, and so on.
autotroph
An autotroph
You may be thinking of Antarctic Krill, Euphausia superba,which forms the base of the Antarctic food chain.
autotroph
it is an autotroph because it makes its own food.
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.
An Autotroph is a plant and uses photosynthesis to make food. They do not consume.