Antarctic Penguin Diets Shift as Sea Ice Loss Alters Food Web, Study Finds

Researchers used three decades of satellite imagery of Adélie penguin guano to infer dietary changes, finding that penguins eat more fish when sea ice is abundant but rely more on krill when ice is scarce. This shift leads to lighter chicks and declining populations in areas where fish consumption drops. The study highlights how warming and industrial krill fishing are disrupting the Antarctic marine food web.