Colonial suppression of Indigenous fire management transformed Australian forests into tinderboxes
A study in Nature examining 1,000 years of vegetation history in southeastern Australia's Croajingolong National Park shows that colonization triggered dramatic ecological changes including a fourfold increase in eucalypt cover and transformation from open woodland to dense forest. Before European settlement, the Gunaikurnai people maintained the landscape through cultural burning practices that prevented catastrophic fires even during periods of severe fire weather comparable to Ash Wednesday and Black Saturday. The research demonstrates that current wildfire vulnerability results primarily from colonial land-use changes rather than climate factors alone.
Researchers analyzed lake sediment samples from Croajingolong National Park spanning the last millennium, using charcoal deposits and infrared analysis to reconstruct historical fire patterns and vegetation composition. The findings reveal that prior to European arrival, the Gunaikurnai people deliberately employed controlled burning techniques that maintained the landscape in an open state, preventing fuel accumulation. Even when severe drought conditions comparable to modern catastrophic fire seasons occurred, these management practices successfully mitigated wildfire risk.
The research indicates that post-colonization fire regimes fundamentally altered ecosystem composition, with eucalypt populations increasing fourfold as dense forest replaced open woodland. Soil erosion also increased significantly following the cessation of traditional burning practices, suggesting cascading environmental consequences beyond fire dynamics alone.
These findings could influence wildfire management policy across fire-prone regions by suggesting that restoring Indigenous-led burning practices may reduce catastrophic fire vulnerability more effectively than climate-focused approaches alone. Land managers and policymakers may face pressure to recognize and implement Traditional Owner knowledge systems, potentially reshaping forest management agreements and resource allocation decisions. The research could also affect public understanding of "wilderness" concepts and recognition of Indigenous peoples' historical environmental stewardship, though implementation challenges around staffing, funding, and coordination between agencies remain.