Wildlife diseases poised to spread northwards as climate changes - study
By Yereth Rosen ANCHORAGE (Reuters) - As the world’s climate warms, parasite-carried wildlife diseases will move north, with animals in cold far-north and high-altitude regions expected to suffer the most dramatic increases, warns a study to be published on Friday in the journal Science.
By Yereth Rosen
ANCHORAGE (Reuters) - As the world’s climate warms, parasite-carried wildlife diseases will move north, with animals in cold far-north and high-altitude regions expected to suffer the most dramatic increases, warns a study to be published on Friday in the journal Science.
The study projects increasing spread over the next five decades of wildlife diseases caused by bacteria, fungi, viruses and infectious worms. There are serious implications for humans, said co-author Jason Rohr of the University of Notre Dame.
“We do know that 75% of emerging infectious diseases have a wildlife origin,” said Rohr, who runs an ecology and public health lab at Notre Dame. “We should be concerned for our own health when we see studies suggesting that there could be increases in infectious disease in wildlife.”
Climate change is already causing a surge in wildlife diseases, the study notes. And people are already being infected with diseases coming from wildlife, including COVID-19, Rohr said.
The study supports the “thermal mismatch” theory of wildlife disease, finding that cold-adapted species are at increased risk when their habitats warm and warm-adapted species are at increased risk when their habitats cool.
It is based on records of 7,346 wildlife populations comprising 1,381 terrestrial and freshwater species, from tiny insects to big mammals across all seven continents. It uses past climate records and varying scenarios for future climate conditions over the next five decades to calculate trends for parasites spreading wildlife diseases.
At current rates of carbon emissions and warming, the study found, those parasites will increase “sharply” in prevalence at high latitudes and high altitudes, some nearly doubling by 2070 at many boreal and mountain locations.
If warming is slowed, however, there will be “much, much smaller increases in infectious disease in wildlife,” Rohr said.
At most risk are cold-blooded animals - including amphibians, fish and insects - that cannot regulate body temperatures to adjust to warming conditions, Jeremy Cohen of the University of Wisconsin, the study’s first author, said by email.
Mammals in cold climates can partially offset heat stress by adjusting their body temperatures, said Cohen, who started his research with Rohr at the University of South Florida. Still, parasites like ticks that infect mammals with diseases will develop faster and reproduce more in warming conditions, Cohen said.
“Therefore, warm weather creates the perfect storm for parasites to proliferate in northern areas, where they may have previously been unable to thrive,” he said.
The study does not break down risks by animal species. That is the subject of ongoing research, Rohr said. The study does not consider marine ecosystems; there is too little information available about marine systems to use in the disease-spread model, Rohr said.
(Reporting by Yereth Rosen; editing by Bill Tarrant)
This story has not been edited by Firstpost staff and is generated by auto-feed.
By Robin Emmott and John Irish | BRUSSELS/PARIS BRUSSELS/PARIS France and Germany will agree to a U.S. plan for NATO to take a bigger role in the fight against Islamic militants at a meeting with President Donald Trump on Thursday, but insist the move is purely symbolic, four senior European diplomats said.The decision to allow the North Atlantic Treaty Organization to join the coalition against Islamic State in Syria and Iraq follows weeks of pressure on the two allies, who are wary of NATO confronting Russia in Syria and of alienating Arab countries who see NATO as pushing a pro-Western agenda."NATO as an institution will join the coalition," said one senior diplomat involved in the discussions. "The question is whether this just a symbolic gesture to the United States
BEIJING Chinese President Xi Jinping on Wednesday called for greater efforts to make the country's navy a world class one, strong in operations on, below and above the surface, as it steps up its ability to project power far from its shores.China's navy has taken an increasingly prominent role in recent months, with a rising star admiral taking command, its first aircraft carrier sailing around self-ruled Taiwan and a new aircraft carrier launched last month.With President Donald Trump promising a US shipbuilding spree and unnerving Beijing with his unpredictable approach on hot button issues including Taiwan and the South and East China Seas, China is pushing to narrow the gap with the U.S. Navy.Inspecting navy headquarters, Xi said the navy should "aim for the top ranks in the world", the Defence Ministry said in a statement about his visit."Building a strong and modern navy is an important mark of a top ranking global military," the ministry paraphrased Xi as saying.