Quantcast

First Mammal Goes Extinct Due to Human-Caused Climate Change

Animals

The Bramble Cay melomys—a rodent found only on Australia's Great Barrier Reef—has been declared extinct, according to a new study from researchers at the Queensland’s Department of Environment and Heritage Protection and the University of Queensland.

Alarmingly, this could be the first mammal species wiped out due to human-induced climate change.

The Bramble Cay melomys have vanished from its 350m-long cay home in the Torres Strait due to sea-level rise and weather events. Photo credit: Queensland Government

The researchers came to the conclusion after failing to find a single specimen of the melomys, also called the mosaic-tailed rat, from its only known habitat.

"A thorough survey effort involving 900 small mammal trap-nights, 60 camera trap-nights and two hours of active daytime searches produced no records of the species, confirming that the only known population of this rodent is now extinct," the study states.

Sea-level rise and weather events in the Torres Strait region, which lies between Australia and the Melanesian island of New Guinea, was determined as the root cause of the loss. The scientists said that the events destroyed the animals' sole habitat on Bramble Cay, a small vegetated coral cay in northern Australia. Research showed that Bramble Cay had reduced dramatically in size from approximately 2.2 ha in 2004 to only 0.065 ha, equivalent to a 97 percent loss in the span of 10 years.

"The key factor responsible for the extirpation of this population was almost certainly ocean inundation of the low-lying cay, very likely on multiple occasions, during the last decade, causing dramatic habitat loss and perhaps also direct mortality of individuals," the study states.

"Significantly, this probably represents the first recorded mammalian extinction due to anthropogenic climate change," the team concluded. Anthropogenic means caused or influenced by humans.

The location of Bramble Cay. Photo credit: Queensland Government

The Melomys rubicola was first discovered by Europeans in April 1845, when Lieutenant Yule, commander of the HMS Bramble, and his crew shot the “large rats” for sport. Anecdotal information obtained from a professional fisherman indicated that the last known sighting of the Bramble Cay melomys was in late 2009.

The 2015 IUCN Red List of Threatened Species indicates that climate change could have led to the extinction of the Little Swan Island hutia, a rodent previously found on the Honduras. However, the Queensland scientists pointed out that its demise was actually due to a cat that was introduced to the island.

In a sign of hope for the melomys, the study pointed out there could be another population of the species in neighboring Papua New Guinea.

"Consequently, at this stage, it may be premature to declare the Bramble Cay melomys extinct on a global scale," the report said.

The Center for Biological Diversity said there’s an “extinction crisis” underway that threatens our planet’s biodiversity.

“Our planet is now in the midst of its sixth mass extinction of plants and animals—the sixth wave of extinctions in the past half-billion years,” the organization noted. “We’re currently experiencing the worst spate of species die-offs since the loss of the dinosaurs 65 million years ago. Although extinction is a natural phenomenon, it occurs at a natural ‘background’ rate of about one to five species per year. Scientists estimate we’re now losing species at 1,000 to 10,000 times the background rate, with literally dozens going extinct every day. It could be a scary future indeed, with as many as 30 to 50 percent of all species possibly heading toward extinction by mid-century.”

Human activities such as climate change, deforestation and wildlife trafficking could drive species off the planet.

“Unlike past mass extinctions, caused by events like asteroid strikes, volcanic eruptions and natural climate shifts, the current crisis is almost entirely caused by us—humans,” Center for Biological Diversity added. “In fact, 99 percent of currently threatened species are at risk from human activities, primarily those driving habitat loss, introduction of exotic species and global warming.”

YOU MIGHT ALSO LIKE

May Shatters Yet Another Monthly Heat Record as CO2 Levels Soar

Chile’s Salmon Industry Using Record Levels of Antibiotics to Combat Bacterial Outbreak

Noam Chomsky: The Doomsday Clock Is Nearing Midnight

Is it Too Soon to Consider Removing Giant Pandas From the Endangered Species List?

EcoWatch Daily Newsletter

Pxhere

By Richard Denison

Readers of this blog know how concerned EDF is over the Trump EPA's approval of many dozens of new chemicals based on its mere "expectation" that workers across supply chains will always employ personal protective equipment (PPE) just because it is recommended in the manufacturer's non-binding safety data sheet (SDS).

Read More Show Less
De Molen windmill and nuclear power plant cooling tower in Doel, Belgium. Trougnouf / CC BY-SA 4.0

By Grant Smith

From 2009 to 2012, Gregory Jaczko was chairman of the Nuclear Regulatory Commission, which approves nuclear power plant designs and sets safety standards for plants. But he now says that nuclear power is too dangerous and expensive — and not part of the answer to the climate crisis.

Read More Show Less
Sponsored
A lake in Rocky Mountain National Park. Brett Walton / Circle of Blue

By Brett Walton

When Greg Wetherbee sat in front of the microscope recently, he was looking for fragments of metals or coal, particles that might indicate the source of airborne nitrogen pollution in Rocky Mountain National Park. What caught his eye, though, were the plastics.

Read More Show Less
Gabriele Holtermann Gorden / Pacific Press / LightRocket / Getty Images

In a big victory for animals, Prada has announced that it's ending its use of fur! It joins Coach, Jean Paul Gaultier, Giorgio Armani, Versace, Ralph Lauren, Vivienne Westwood, Michael Kors, Donna Karan and many others PETA has pushed toward a ban.

This is a victory more than a decade in the making. PETA and our international affiliates have crashed Prada's catwalks with anti-fur signs, held eye-catching demonstrations all around the world, and sent the company loads of information about the fur industry. In 2018, actor and animal rights advocate Pamela Anderson sent a letter on PETA's behalf urging Miuccia Prada to commit to leaving fur out of all future collections, and the iconic designer has finally listened.

Read More Show Less
Amer Ghazzal / Barcroft Media / Getty Images

If people in three European countries want to fight the climate crisis, they need to chill out more.

That's the conclusion of a new study from think tank Autonomy, which found that Germany, the UK and Sweden all needed to drastically reduce their workweeks to fight climate change.

"The rapid pace of labour-saving technology brings into focus the possibility of a shorter working week for all, if deployed properly," Autonomy Director Will Stronge said, The Guardian reported. "However, while automation shows that less work is technically possible, the urgent pressures on the environment and on our available carbon budget show that reducing the working week is in fact necessary."

The report found that if the economies of Germany, Sweden and the UK maintain their current levels of carbon intensity and productivity, they would need to switch to a six, 12 and nine hour work week respectively if they wanted keep the rise in global temperatures to the below two degrees Celsius promised by the Paris agreement, The Independent reported.

The study based its conclusions on data from the UN and the OECD (Organisation for Economic Co-operation and Development) on greenhouse gas emissions per industry in all three countries.

The report comes as the group Momentum called on the UK's Labour Party to endorse a four-day work week.

"We welcome this attempt by Autonomy to grapple with the very real changes society will need to make in order to live within the limits of the planet," Emma Williams of the Four Day Week campaign said in a statement reported by The Independent. "In addition to improved well-being, enhanced gender equality and increased productivity, addressing climate change is another compelling reason we should all be working less."

Supporters of the idea linked it to calls in the U.S. and Europe for a Green New Deal that would decarbonize the economy while promoting equality and well-being.

"This new paper from Autonomy is a thought experiment that should give policymakers, activists and campaigners more ballast to make the case that a Green New Deal is absolutely necessary," Common Wealth think tank Director Mat Lawrence told The Independent. "The link between working time and GHG (greenhouse gas) emissions has been proved by a number of studies. Using OECD data and relating it to our carbon budget, Autonomy have taken the step to show what that link means in terms of our working weeks."

Stronge also linked his report to calls for a Green New Deal.

"Becoming a green, sustainable society will require a number of strategies – a shorter working week being just one of them," he said, according to The Guardian. "This paper and the other nascent research in the field should give us plenty of food for thought when we consider how urgent a Green New Deal is and what it should look like."

Sponsored
Amazon Employees for Climate Justice held a press conference after the annual shareholder meeting on May 22. Amazon Employees for Climate Justice

Amazon shareholders voted down an employee-backed resolution calling for more aggressive action on climate change at their annual meeting Wednesday, The Los Angeles Times reported.

Read More Show Less
An artist's rendering of the recomposition facility. MOLT Studios

Washington became the first U.S. state to legalize human composting Tuesday, offering residents a more environmentally friendly way to dispose of their remains, AFP reported.

Read More Show Less
Mr.TinDC / Flickr / CC BY-ND 2.0

By Adda Bjarnadottir, MS

Many nutrients are essential for good health.

Read More Show Less