Prior to Mincemeat, they had created a network of fictitious double agents to feed misinformation to the Nazis.

BBC: Operation Mincemeat: How a dead tramp fooled Hitler

And given that the krill (tiny crustaceans) that penguins feed on are also dependent on the ice for their own existence (they feed on algae on the ice) - some colonies affected by eroded floes could face a double-whammy of high fledgling mortality and restricted food resources.

BBC: Emperor penguins counted from space