As the world goes through what some scientists believe to be its hottest year on record, emperor penguin populations in the Antarctic are suffering catastrophic losses, with no chicks surviving the spring of 2022 in four of five colonies observed for a new study.
The loss of the chicks coincides with record low sea ice coverage and was predicted as the world warmed, but the collapse in numbers has happened faster and sooner than expected, prompting fears for the future of the animal.
Emperor penguins chicks have struggled to survive in 2022 after record low sea ice coverage impacted their birth rates.Credit: Shutterstock.com
“Emperor penguins have no external threats except climate change and sea ice,” said the study’s lead author, Peter Fretwell, a scientist with the British Antarctic Survey.
“They have never been hunted, hardly any contact with humanity. It is purely climate change. You can’t put the ice back. This is a global problem. If we don’t do something we are driving them to the brink of extinction.”
Emperor penguin colonies rely on sea ice between April and January to breed, but any change to their habitat impacts whether chicks develop waterproof feathers, and ultimately survive.
Fretwell said this was the first regional breeding failure of emperor penguins in the past 13 years. He and his team surveyed colonies at Rothschild Island, Verdi Inlet, Smyley Island, Bryan Coast, and Pfrogner Point, where penguin populations ranged from 630 to 3,500.
He said that more broadly, about 30 per cent of emperor penguin colonies across the Antarctic coastline had been impacted by the low sea ice. He added chick births this year could be even worse than in previous years given the record low sea ice driven by record warm ocean temperatures.
Scientists have recorded significant decreases in sea ice around Antarctica since 2016. While there have been small rebounds in recent years, they remain far below the record high of 2014. The image below, from the University of Maine’s Climate Reanalyzer, compares sea ice extent in July 2014 to July this year.
