Tasmania trials rehabilitation of fire-damaged Sphagnum peatlands in wilderness area

What is the background?

Alpine Sphagnum bogs help regulate catchment hydrology, filter water, and prevent erosion, while supporting endemic plants and animals that depend on year-round moisture. Peatland restoration Tasmania work matters because these ecosystems are restricted to cool, wet environments that are largely fire-free by nature and recover poorly once burned, unlike most Australian vegetation.

What happened?

Tasmania’s Sphagnum peatland community is listed as a threatened native vegetation community on Schedule 3A of the state’s Nature Conservation Act 2002 — a listing that covers all Sphagnum communities in Tasmania, including lowland occurrences. Researchers have been trialling rehabilitation methods at Lake Mackenzie in the Tasmanian Wilderness World Heritage Area, where an extensive fire in 2016 damaged Sphagnum peatlands and pencil pine stands.

The Lake Mackenzie Rehabilitation Trials, funded by the Tasmanian Department of Primary Industries, Parks, Water and the Environment, tested methods for restoring both the peatland vegetation and the erodible soils the fire exposed.

How did it happen?

Increased fire frequency linked to climate change is a growing threat to Sphagnum bogs specifically because these ecosystems evolved without regular fire and lack the regrowth adaptations found in most Australian flora — a single fire can set recovery back decades rather than triggering the renewal cycle common in eucalypt forest. The 2016 fire at Lake Mackenzie gave researchers a real-world site to test rehabilitation techniques rather than relying on theoretical modelling alone.

Tasmania has also ended licensed commercial harvesting of Sphagnum moss on publicly managed land, removing an additional pressure on the same ecosystem the rehabilitation trials are working to restore.

Why does it matter?

Sphagnum peatlands function as long-term water stores and carbon sinks — when drained or burned, they can shift from storing carbon to releasing it. Testing rehabilitation methods at a real burned site means Tasmania is building a practical, evidence-based toolkit for responding to future fires in these ecosystems, rather than starting from scratch after the next one.

The threatened-species listing gives the Sphagnum community legal standing that can support further conservation funding and restrict damaging activities, while the end of commercial harvesting removes a pressure that previously compounded fire risk to the same bogs.

What were the key results?

• Sphagnum peatland community listed as threatened under Tasmania’s Nature Conservation Act 2002
• Listing covers all Sphagnum communities in the state, including lowland occurrences
• Lake Mackenzie Rehabilitation Trials tested peatland and pencil pine recovery methods
• Trials responded to damage from an extensive 2016 bushfire in the Tasmanian Wilderness World Heritage Area
• Funded by the Tasmanian Department of Primary Industries, Parks, Water and the Environment
• No licensed commercial Sphagnum harvesting remains on Tasmania’s publicly managed land
• Sphagnum bogs identified as poorly adapted to recover from fire compared with most Australian flora

What happens next?

Researchers plan to apply lessons from the Lake Mackenzie trials to future fire-affected peatland sites in Tasmania.

The Tasmanian government is expected to continue monitoring Sphagnum communities under their threatened-species listing.

Fire management agencies are expected to factor peatland fire sensitivity into planning for the Tasmanian Wilderness World Heritage Area.

Conservation researchers said further trials will help refine rehabilitation methods as more data from Lake Mackenzie becomes available.