Science & Health

A Global Tragedy Is Unfolding In Tasmania

A Global Tragedy Is Unfolding In Tasmania

The blackened skeletons of scorched trees jut out of the smouldering Earth like angry bee stings. A smell of ash, dust and death hangs in the air. This isn’t a scene from a post apocalyptic movie. It’s part of a Tasmanian World Heritage Site that harbours some of the oldest trees on Earth.

“These forests are never coming back,” David Bowman, an ecologist at the University of Tasmania told Gizmodo. “When they burn, they’re gone forever.”

An island the size of Ireland with a population of 500,000, it’s easy to forget about Tasmania, located just 2575km from the Antarctic coast. But this tiny slip of rugged terrain is an ecological wonder. Geographic variation and isolation have colluded to create a stunning diversity of ecosystems, from evergreen eucalyptus forests to alpine heathlands to temperate rainforests. On the island’s cool, wet mountaintops, 1500 year old trees carry a genetic legacy connecting Tasmania to the ancient supercontinent of Gondwana.

Now, patches of this planetary heritage are going up in smoke, thanks to a devastating fire season that many experts say could portend the future.

A Global Tragedy Is Unfolding In Tasmania

A lake in the Central Plateau Conservation area, Via Dan Broun

Since mid January, out-of-control bushfires sparked by lightning storms have raged across Tasmania’s World Heritage Wilderness Area. The Tasmanian Fire Service, unaccustomed to tackling dozens of wildfires at once in remote locales, is finding itself outmatched. While authorities focus on suppressing the blazes that pose the biggest risk to humans and property, many wild areas are being left to burn.

As of last week, over 25,000 acres of land — roughly two per cent of the World Heritage Area — had been torched. ABC Online reports that the Tasmanian fire service is gearing up for another month of bushfire operations, but it expects that remote areas could continue to burn for weeks to come.

The fires have left raw devastation in their wake, which Tasmania-based wilderness photographer Dan Broun witnessed firsthand when hiking in the Central Plateau Conservation Area on January 13. “The Central Plateau is like a mosaic of thousands of zen gardens, each one unique and borne through several ice ages,” he told Gizmodo. “To see such an ancient and beautiful place that I love devastated has left me in shock.”

A Global Tragedy Is Unfolding In Tasmania

A sign welcomes bushwalkers to Tasmania’s Central Plateau Conservation Area, via Dan Broun

A Global Tragedy Is Unfolding In Tasmania

1500 year old Pencil Pine trees were torched in Tasmania’s Wilderness World Heritage Are, via Dan Broun

A Global Tragedy Is Unfolding In Tasmania

Cushion plants were burned as a fire swept through an alpine heathland in Tasmania’s Wilderness World Heritage Are, via Dan Broun

A Global Tragedy Is Unfolding In Tasmania

A stand of alpine trees was scorched by a bushfire in Tasmania’s Wilderness World Heritage Are, via Dan Broun

The factors behind this horrific fire season are complex. As in many parts of the world, Tasmania’s normal rainfall patterns are being disrupted by the largest El Niño event on record, which kept spring rains at bay and brought hot, dry weather to the state this summer. The effects of El Niño are compounded by a positive Indian Ocean Dipole event, in which abnormally cool waters in the eastern Indian Ocean produce drier weather in neighbouring countries like Indonesia and Australia.

“We’ve had quite a terrible conjunction [of circumstances] that led to effectively no spring in Tasmania, and then a warm, dry summer,” Bowman said. Right now, the ground is so dry that “if we had a catastrophic fire day, you could burn half the island down”.

But as an ecologist, Bowman sees this exceptional summer in a broader context. From unprecedented heat waves in the southeast to a spate of devastating fires across the Australian alps to record high temperatures around the world, what’s happening in Tasmania is a microcosm of what’s happening to our planet.

A Global Tragedy Is Unfolding In Tasmania

A stand of alpine trees was scorched by a bushfire in Tasmania’s World Heritage Area, via Dan Broun

“From my point of view, you’ve got all these events piling up,” he said. “If you’re a doctor confronted with a lot of symptoms, you look at the constellation of factors and draw a conclusion.”

To Bowman, that conclusion is clear: “This is a pattern of unusual things that are no longer unusual, they’re consistent with a theory called climate change.”

William Steffen, a climate scientist at Australian National University, agreed. “Those forests have been there for thousands of years,” he told Gizmodo. “El Niños have come and gone, and they have not burned. But now, we have a strong underlying warming trend.”

Michael Grose, a climate scientist with the Australian national science agency, cautioned that scientists haven’t yet directly attributed this bizarre year to human-caused warming. But he agreed that recent events in Tasmania are consistent with what we expect climate change to bring to the state — namely, hotter, drier weather. And that makes him very worried.

“Dry springs and summers, hotter temperatures and more fires would make it difficult for these ecosystems to continue as they are,” Grose told Gizmodo. “And since this area is on the high plateaus of Tasmania, there isn’t anywhere further uphill where the vegetation could move.”

A Global Tragedy Is Unfolding In Tasmania

Scorched Earth recently covered with the shrub Richea scoparia, via Dan Broun

But as bleak at this sounds, acknowledging the fiery future may be the best thing Tasmanian land managers can do to protect the remaining wilderness. “If the people running the World Heritage Area identified it as an area at-risk to climate change, that reframes the debate,” Bowman said.

Right now, there’s almost nothing the Tasmanian Fire Service can do about the remote wildfires, many of which are burning through carbon-rich peat underground. But by bringing in more firefighting resources, increasing drone and satellite surveillance, and using controlled burns to reduce the amount of fuel on the ground, the government could help prevent catastrophic situations from developing in the future.

Scientists say Tasmania also needs to be thinking about how to preserve its ecological legacy in the event of a total system collapse. “The final option is to salvage the biodiversity and put it somewhere else,” Bowman said.

A Global Tragedy Is Unfolding In Tasmania

An unlucky wallaby got caught in an alpine brushfire in Tasmania, via Dan Broun

Fortunately, the Tasmanian Seed Conservation Centre, which stores seeds for numerous endemic species, was built for exactly this purpose. “For restoration and revegetation efforts you generally require larger numbers,” Seed Conservation Centre director James Wood told Gizmodo in an email. But the collections are large enough to at least maintain the genetic heritage of many species.

This year, Wood and his colleagues made their first collection of Huon pine, a very slow-growing conifer restricted to the valleys of Tasmania’s wet temperate rainforests. The species has weathered several ice ages, and high on the slopes of Mount Read, a small stand is reputed to be 10,000 years old. If its soils are burned away by fires, these ancient trees may not be able to hang on much longer.

“We can preserve seeds,” Wood said, “but ultimately we can’t preserve an ecosystem.”

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