Tasmania’s ancient rain forest and alpine flora species face an uncertain future, scientists have warned, after out-of-control bushfires consumed vast tracts of wild bushland.
As authorities yesterday downgraded emergency warnings, with wetter weather — and even some snow — bringing respite from more than a month of rolling fires, scientists warned that they are still assessing the damage to the island’s unique environment.
Wildfires have scorched more than 205,000 hectares in the southwest, center and northwest of the island — fueled, scientists believe, by climate change.
Most of the native eucalypt forests have adapted to frequent burning, but Tasmania is a refuge for ancient species, whose presence dates back millions of years to when Australia was part of a supercontinent called Gondwana.
Located in the Tasmanian Wilderness World Heritage Area, these species are more accustomed to ice ages than bushfires and include the slow-growing pencil pine, king billy pine and cushion plant.
They require a “cool, very permanently wet and fireproof” environment, University of Tasmania professor of environmental change biology David Bowman told reporters after a trip to inspect the burned wilderness.
“It’s like a bonsai garden gone berserk,” Bowman said, describing the species.
“Some of the trunks of these pencil pines are 1,000 years old, but they’re clonal, so they have been there for 10,000 years,” he said.
“They’re resilient to ice ages, but when you warm the climate they are completely toast,” he added.
While scientists remain hopeful that rain forests were wet enough to repel the worst fire damage, climate models have shown a trend toward greater drying of western Tasmania and an increase in the dry lightning thunderstorms responsible for sparking the recent blaze.
University of Tasmania climate research fellow Nick Earl and his colleagues warned in a recent paper that climate change might permanently alter the viability of these ecosystems.
“Some regions of the west coast of Tasmania used to have very little to no risk of bushfires, as they were always damp. However, this is no longer the case, resulting in species coming under threat,” they wrote.
“Endemic species like pencil pine, huon pine and deciduous beech may be wiped out by one fire,” they added.
This risk has prompted calls for more resources to be made available for remote area firefighting to safeguard irreplaceable ecosystems.
“Pencil pines are really the plant equivalent of the Tasmanian tiger or the Tasmanian devil,” Bowman said.
“They’re serious business for us culturally,” he added.
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