User:Clayoquot/Ice

An ice-dependent species or pagophilic species is a species that depends on ice for aspects of its survival. Examples include several species of seals, which must haul out on ice to give birth and to nurse their young, the polar bear, which uses sea ice as a platform for hunting seals, and krill which in early life stages feed on phytoplankton from the underside of sea ice. Species which depend on ice-dependent species as a food source, such as the Adelie penguin which feeds on krill, are also considered ice-dependent.

As... ice-dependent species are at high risk of depletion or extinction due to global warming.

Stuff
"Krill, the small shrimp-like crustacean that is the main food source for many species of penguins, seals and whales, spend their early life grazing phytoplankton from the underside of winter sea ice." - http://www.antarctica.ac.uk/press/journalists/resources/science/sciencebriefingpenguins.php