Emperor penguin and Antarctic fur seal now Endangered due to climate change – IUCN Red List
- The emperor penguin and Antarctic fur seal are now both Endangered, according to The IUCN Red List of Threatened Species™.
- Climate change in Antarctica is leading to changes in sea-ice that are projected to cause the emperor penguin population to halve by the 2080s, while reduced food availability has already driven a 50% reduction in the Antarctic fur seal population since 2000.
- The emperor penguin (Aptenodytes forsteri) has moved from Near Threatened to Endangered on the IUCN Red List, based on projections that its population will halve by the 2080s.
- The Antarctic fur seal (Arctocephalus gazella) has moved from Least Concern to Endangered on the IUCN Red List, as its population has decreased by more than 50 per cent from an estimated 2,187,000 mature seals in 1999 to 944,000 in 2025.
- The southern elephant seal (Mirounga leonina) has moved from Least Concern to Vulnerable on the IUCN Red List, following declines caused by Highly Pathogenic Avian Influenza (HPAI).
Sentinel Species:
- It is a species whose members’ health signals the condition of the ecosystem in which they live.
- Characteristics: They are among the first to respond to stressors in their environment, such as pollution and disease.
- Their response also tends to be more apparent than most other species.
- They can provide early warnings of ecosystem decline.
- These species tend to occupy a fixed territory and live long enough to accumulate toxins.
- They also have physiologies that amplify the effects of environmental change. Thus, when something goes wrong in their habitat, they show it first.
Examples:
- Frog: Their skin is permeable and absorbs whatever enters the water or soil around them, making them very sensitive to pesticides and pathogens. A declining frog population has often been a sign of wider ecological stress, even before other indicators detect the problem.
- Canaries in coal mines worked on the same principle: the bird’s faster metabolism made it succumb to carbon monoxide before human miners could notice anything.
- Researchers also use honeybees to track agricultural chemical loads, polar bears to monitor Arctic contaminant accumulation, and certain fish species to detect industrial runoff.