This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: In Australia, many Indigenous communities have connections and stories linked to the she-oak. She-oaks (the genus Casuarina and the related genus Allocasuarina) may look like a conifer with their canopies drooping in soft, needle-like fronds.
But these are jointed green branchlets that photosynthesize in place of true leaves. This adaptation reduces water loss and is part of the toughness that lets she-oaks thrive in harsh Australian conditions. Wind-pollinated and fire-adapted, the she-oak produces small woody cones packed with winged seeds.
Its dense, reddish timber prompted early colonists to liken it to an oak and prize it for firewood, kiln fuel and construction. As the wind moves through its needles, the tree releases a low, soft sigh, a sound closer to distant surf than rustling leaves. She-oaks are also heroes of our ecosystem.
Bandicoots forage in their needle beds, glossy black-cockatoos feed almost exclusively on the seeds inside their cones, and she-oaks enrich the ground they grow in, hosting nitrogen-fixing bacteria in their roots. For millennia, GunaiKurnai Aboriginal Elders maintained a she-oak woodland on their lands that stretch from the coastal and inland areas of Gippsland to the southern slopes of the Victorian Alps. At Cloggs Cave, in East Gippsland in Victoria's southeast, archaeologists uncovered she-oak artifacts used in rituals by Aboriginal medicine men and women known as mulla-mullung.
It's a connection that points to both cultural and economic reasons for actively caring for she-oak woodlands. But she-oaks are in major decline across Australia. The landmark Australia State of the Environment 2021 report found she-oak forests and woodlands are the worst-hit major native vegetation group in the country, having lost more than 40% of their pre-European range.
What's left is often a flammable tinderbox, a transformed landscape that shows why restoration needs to be grounded in Indigenous Knowledges. The decline of she-oak woodlands highlights the urgency of effective restoration. But that restoration relies almost entirely on historical baselines, a picture of what grew where before the landscape changed.
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