World’s largest iceberg threatens penguin islands

Antarctic iceberg A23a, drifting northward after nearly 40 years, could collide with South Georgia, disrupting habitats and food chains for wildlife such as penguins. If A23a were to run aground on South Georgia, it could form a natural barrier that would cut off foraging paths for penguins, seals, and other animals, leading to starvation in their young, and the freshwater released by the melting iceberg could change the salinity of localized seawater, affecting basal organisms such as krill, and thus impacting the entire ecosystem.