Climate change is one of the greatest challenges of our time and has profound effects on nature and wildlife. Species that depend on stable ice surfaces are particularly affected. Among them are emperor penguins, which have now been classified as a “highly endangered species” by the International Union for Conservation of Nature (IUCN). This reassessment highlights how dramatically their living conditions have deteriorated in recent years.
The emperor penguin is the largest penguin species in the world and lives exclusively in Antarctica. Its entire life cycle is closely tied to the presence of sea ice. This ice serves not only as a habitat but, above all, as a breeding ground for raising chicks. However, this very sea ice is steadily declining due to rising global temperatures. Since 2016, record low levels of sea ice have been repeatedly recorded in Antarctica. If the ice breaks up too early in the year, before the chicks are able to swim, entire breeding colonies can fall into the sea, with often devastating consequences. Many chicks drown, and entire generations can be lost.
The numbers illustrate the severity of the situation: between 2009 and 2018, the emperor penguin population has already declined by about ten percent. In 2018, an estimated 180,000 individuals remained. Scientific projections suggest that this number could be halved by 2080 if current trends continue. Climate change not only directly affects the ice but also the entire ecosystem on which the penguins depend.
The situation is similarly alarming for the Antarctic fur seal. This species has also been classified as “highly endangered.” Its population has more than halved since 1999 and currently stands at around 944,000 individuals. A key reason for this is the decline of their primary food source: krill. These small, shrimp-like crustaceans are a fundamental part of the Antarctic food web. However, due to rising ocean temperatures, they are moving into deeper, colder waters. As a result, it is becoming increasingly difficult for fur seals to find sufficient food, directly affecting their reproduction and survival.
The southern elephant seal is also affected and has now been classified as “vulnerable.” In addition to climate change, the spread of diseases plays a crucial role. Avian influenza, in particular, has caused significant damage in recent years. It has affected multiple populations, and in some colonies, more than 90 percent of newborn pups have died. With rising temperatures, the spread of such diseases could accelerate further, worsening the situation.
The reclassification of these animal species on the IUCN Red List is more than just a scientific assessment, it is an urgent appeal to the global community. It shows that the impacts of climate change are no longer a distant future threat but are already being felt today. Particularly sensitive ecosystems such as Antarctica respond quickly and visibly to changes, and the animals living there are often the first victims.
Rosamaria Kubny, PolarJournal