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Victoria’s Native Timber Renaissance Could Start in Burnt Forest

Silviculture experts have found that thinning mountain ash grows trees as big as forest left alone, on plots cut more than 30 years ago.


Tue 04 August 26

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The Victorian Nationals are finalising a native timber policy for November’s state election, with the industry closed since January 2024. That is according to Danny O’Brien, Leader of the Victorian Nationals, whose commitment ABC Gippsland Breakfast replayed on Monday.

“We will continue to support the native timber industry in Victoria,” O’Brien said, with the party still working through what it can put to voters and no announcement made.

“There would be some renaissance of a native timber industry in some form,” presenter Mim Hook told listeners, with post-fire cleanups still taking timber, private-land mills still operating across Gippsland, and Australian Sustainable Hardwoods still running at Heyfield.

It comes mere days after Jacinta Allan, the premier who wound up native forestry resigned as premier, with Ben Carroll taking the top job. Newspoll has the Coalition ahead 52 to 48 after preferences and the first poll since the change puts its primary vote at 30 per cent against Labor’s 23, with One Nation in the twenties.

Jacinta Allan in a hard hat and high visibility vest speaking with workers on a Victorian construction site
Jacinta Allan on a Victorian infrastructure site before she stood down on 28 July, ending the premiership that carried the native forest harvesting ban brought forward to January 2024. (Photo Credit: Victorian Government)

Silviculture expert Patrick Baker, Professor of Silviculture and Forest Ecology at the University of Melbourne and Director of the AFWI Centre for Climate-Smart Forestry, has put thinning forward for forest Victoria has already harvested or burnt. “Thinning would probably be a reasonable thing to consider in those places,” Baker said of forest clear-felled in the past three or four years and country the fires have been through, which between them cover much of the Central Highlands.

Infrared aerial photograph of a heavily thinned mountain ash coupe showing retained trees in red against dark ground
Infrared imaging of a heavy thinning coupe at Tanjil Bren, where crews took out 50 to 70 per cent of the stand in the late 1980s and left the trees that now measure 108 centimetres across. (Photo Credit: Centre for Forest Tree Technology, via The Conversation, CC BY-ND 4.0)

Best practice is not the claim he makes, and pressed on whether a silviculturist would always reach for silviculture, Baker answered that no single method delivers biodiversity, carbon, resilience, and timber at once.

Thirty years of measurement stand behind that, with the Victorian Forest Commission having cut seven treatments at Tanjil Bren between 1988 and 1990 and the results published on 1 July in the journal Forest Science. The heavily thinned stands now carry the biggest trees on the site at 108 centimetres, having regained every unit of basal area taken out three decades earlier.

Two aerial views side by side showing small cleared patches in mountain ash forest and a heavily thinned stand
Small cleared patches of 50 to 140 metres on the left and a heavily thinned stand on the right, two of the seven treatments the Silvicultural Systems Project tested across 53 plots. (Photo Credit: Centre for Forest Tree Technology, via The Conversation, CC BY-ND 4.0)

Hollow-bearing trees run six times denser in those plots than in the clearfells, and camera traps recorded Leadbeater’s possum in every treated plot and none of the untouched controls. Hollows rarely form below 100 centimetres, which takes close to 120 years in mountain ash and puts them beyond an 80-year clearfell rotation.

The way out has already been audited, with the Auditor-General unable to show that displaced workers were better off and their share in full-time work down from 80 per cent to 60 after the closure.

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    Jason Ross, publisher, is a 15-year professional in building and construction, connecting with more than 400 specifiers. A Gottstein Fellowship recipient, he is passionate about growing the market for wood-based information. Jason is Wood Central's in-house emcee and is available for corporate host and MC services.

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