A good guess would be imported food.
Any food that is hot is generally the best food in the Antarctic region.
Antarctic hair grass is not part of any Antarctic food chain.
Antarctic pearl wort is not part of any food chain on the Antarctic continent.
Because the orca has no predators in Antarctic waters. The Antarctic cod provide excellent food for them, as do penguins, other birds and seals.
in the sea
Ozone hole will affect Antarctic food chain. It will kill all the planktons.
phitoplankton
Antarctic hair grass is not part of any Antarctic food chain.
No food is grown on Antarctica. There are, however, fish that are harvested from waters north of 60 degrees S, that are sometimes called 'Antarctic fish'.
When these penguins feed, their food source is in the Southern Ocean.
they die