How Does Sea Ice Affect Penguins

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0% since the 1970s. Less sea ice during the winter is likely to be the cause and may explain declines seen in several species of penguins. Krill feed on the algae found under the surface of the sea ice, which acts as a kind of ‘nursery’. The Antarctic Peninsula, a key breeding ground for the krill, has experienced a striking decrease in sea ice.
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