Emperor penguins officially enter the endangered category, while Antarctic fur seals follow the same fate. The update of the IUCN Red List photographs an increasingly fragile situation in the Antarctic ecosystem, where the reduction of sea ice is changing the rules of survival for several species.
Scientists explain that emperor penguins depend on stable ice for much of the year. It is used to mate, incubate the eggs, raise the young and complete the moult. When the ice breaks too soon, chicks that are not yet ready to swim end up in the water or die from the cold. Satellite images show a decline of about 10% in the population between 2009 and 2018, amounting to more than 20,000 adults.
Since 2016, sea ice extent has reached record lows, and climate models indicate that the population could halve by the 2080s if emissions are not significantly reduced. Some colonies are already showing worrying signs, with major declines and collapsed breeding sites before the young could survive.
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The enormous impact also on Antarctic fur seals and southern elephant seals
The problem isn’t just about penguins. Antarctic fur seals were also moved to the endangered category after a population decline of more than 50%, which went from over two million specimens to less than one million in about twenty-five years. The main reason is the reduction of krill, their main food source, which moves into deeper waters due to rising temperatures.
The scarcity of krill has direct effects especially on the pups, whose survival in the first year has collapsed in several colonies. This leads to an increasingly older and smaller breeding population. Natural predators such as orcas and leopard seals also contribute to complicating the situation, as well as competition with recovering whales that feed on the same food.
Meanwhile, southern elephant seals are also showing signs of trouble. The species has been classified as vulnerable after widespread deaths linked to highly pathogenic avian influenza. In some colonies over 90% of the cubs have died, while adult females are particularly exposed because they spend more time on the beaches.
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Antarctica as a global wake-up call
These species are sensitive indicators of environmental changes. Animals that live in dense colonies, such as penguins and seals, are particularly vulnerable to disease and habitat loss. Furthermore, rising temperatures facilitate the spread of pathogens in polar areas where animals have so far had little exposure.
The update of the Red List therefore represents a clear signal: the decline of these populations is not isolated, but reflects an increasingly unstable Antarctic ecosystem. Scientists are calling for more extensive monitoring and rapid decisions, while the numbers indicate that the time available to reverse the trend is rapidly reducing.
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