| But most arctic sea ice consists of pack ice, broken sheets moved by wind and ocean currents. |
| Frazer determined that sea ice algae were the main food source of larval krill during winter. |
| These sea ice communities can be supported by materials that are allochthonous and autochthonous. |
| Their preferred habitat is the annual sea ice over the continental shelf and inter-island archipelagos that encircle the polar basin. |
| They look just like the rafts of fragmented sea ice that lie off the coast of Antarctica on Earth. |
| The air above this sea ice is deprived of heat and moisture from the ocean. |
