Salt could be a sweetener for endangered frog species: study

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Scientists may have found a way to stop a deadly fungus that has caused the decline and even extinction of hundreds of frog species around the world.

Simon Clulow, who headed a groundbreaking new research project at the University of Newcastle in Australia, said the devastation of the infectious disease is "on a level that hasn't really ever been seen before in modern times."

Chytridiomycosis is believed to be responsible for the extinction of "about one-third of the world's frog species," the ecologist explained to Xinhua on Monday.

"The first declines are believed to have taken place around the 1950s, however it wasn't until the 1980s when the mass extinction process was really noticed and understood".

Not visible to the naked eye, the microscopic aquatic fungus can spread easily through waterways, on frog skin and even inside the tread of a muddy boot, according to Clulow.

Chytridiomycosis is believed to be responsible for the extinction of about one-third of the world's frog species. /VCG Photo

With very little known about how to combat the destructive disease, the University of Newcastle team noticed something unusual about Australia's east coast amphibians.

"Most of the frogs in eastern Australia have declined from inland populations and highland populations," Clulow said.

"So we set about testing the hypothesis that perhaps salty water could have an effect on the disease."

"Then we conducted outdoor field trials where we salted pools very slightly."

The results showed that researchers could increase the rate of survival when salt was added to the water by around 70 percent.

Clulow said that they only raised the salt by a couple of parts per thousand, "so it's still fresh water that humans can drink, but even the small amount creates an unfavorable environment that the fungus doesn't like."

The team now plans to corroborate its data in parts of South America.

Source(s): Xinhua News Agency