Antarctica has now been affected by bird flu, making it the only continent that has not seen its impact. This concerning development comes from research conducted by Erasmus MC in the Netherlands and the University of California, Davis.
What’s happening?
A team of researchers has revealed that more than 50 skuas in Antarctica perished during the summer seasons of 2023 and 2024 due to the highly pathogenic avian influenza virus H5N1. Their findings were published in the Scientific Reports journal, and further explained in a news release.
Skuas, which are related to gulls, are significant scavengers in their chilly habitats. Their potential to spread the virus is alarming, particularly given their role in ecosystems.
During an expedition covering the South Shetland Islands, the northern Weddell Sea, and the Antarctic Peninsula, samples from wildlife were tested, confirming the presence of H5N1 at every site. While the virus had been detected before, this study marks the first time it has been linked to deaths among these birds.
Interestingly, although other animals like fur seals were found to carry the virus, their deaths were not attributed to it.
“It became clear quite early on that skuas were suffering significantly,” remarked UC Davis co-senior author Ralph Vanstreels.
He depicted a troubling scene where the virus severely affected the birds, causing them to drop from the sky, swim aimlessly, and move about in confusion as it attacked their brains.
Why is the bird flu’s spread important?
First identified in 1996 on a goose farm in China, H5N1 has since spread across the globe, raising concerns among researchers.
“We mishandled the virus as it emerged in the poultry sector,” said Thijs Kuiken, a corresponding senior author from Erasmus MC. “Once it infiltrated wild bird populations, we lost control.”
Now, bird flu has affected nearly every region on Earth, causing significant issues. In the U.S., large farms have faced outbreaks, impacting both animal and human health. The virus is evolving quickly and seems adaptable to various hosts like humans and cattle.
Moreover, there are worries that cats might play a role in transmitting the virus to humans on a larger scale.
In light of the study, a significant decline in the skua population could create further challenges for the already vulnerable Antarctic region, with future risks to penguins being a particular concern.
What’s being done about bird flu in Antarctica?
The researchers are advocating for improved global surveillance and preventive measures to keep better track of avian flu in Antarctica.
“All signs indicate that this virus is likely to spread further,” Kuiken stated. “If we’re not monitoring the situation, we won’t understand what’s happening.”
