Basal Area

AUS-AIF-LVG-BAS General Moderate confidence

Benchmark Value

No specific value — see range
Range: 2 to 8 m²/ha
Optimal Range: 2 to 8
Direction: Higher is desirable ↑
Form: OptimalRange

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context. The scoring engine uses 6 benchmarks together — the OptimalRange form drives the primary score, while 5 guard(s) constrain the result.

Evidence & Context

The optimal functional range for basal area in a grazed arid woodland is the range that successfully balances the positive, facilitative effects of trees with their negative, competitive effects.

Metric Definition:

Range of tree basal area values supporting balanced ecological and pastoral function in grazed arid woodlands.

Benchmark Definition:

Optimal range of basal area balancing facilitative and competitive effects in grazed arid floodplain woodlands.

Justification:

Derived from synthesis of ecological function and management guidelines indicating balance between ecosystem services and pasture productivity.

Sources (1)

Preview of Long-term monitoring and modelling of pasture regeneration and water quality from a Bothriochloa pertusa site in the Great Barrier Reef catchments - CSIRO PUBLISHING | The Rangeland Journal, accessed July 15, 2025,
Long-term monitoring and modelling of pasture regeneration and water quality from a Bothriochloa pertusa site in the Great Barrier Reef catchments - CSIRO PUBLISHING | The Rangeland Journal, accessed July 15, 2025, Journal

Reducing the impacts of grazing on water quality - EPA Victoria, accessed July 10, 2025,

View Source

Supporting Sources (3)

Additional references from the underlying research that informed this benchmark.

Preview of Environmental flow requirements in arid zone rivers- A case study from the Lake Eyre Basin, central Australia - ResearchGate
Environmental flow requirements in arid zone rivers- A case study from the Lake Eyre Basin, central Australia - ResearchGate
Contextual Support Journal

Environmental flow requirements in arid zone rivers- A case study from the Lake Eyre Basin, central Australia - ResearchGate

View Source
Preview of Land condition - FutureBeef
Land condition - FutureBeef
Contextual Support GreyLiterature

Land condition - FutureBeef

View Source
Preview of Persistence of in-stream waterholes in ephemeral rivers of tropical northern Australia and potential impacts of climate change - CSIRO PUBLISHING | Marine and Freshwater Research, accessed July 18, 2025,
Persistence of in-stream waterholes in ephemeral rivers of tropical northern Australia and potential impacts of climate change - CSIRO PUBLISHING | Marine and Freshwater Research, accessed July 18, 2025,
Contextual Support Journal

Persistence of in-stream waterholes in ephemeral rivers of tropical northern Australia and potential impacts of climate change - CSIRO PUBLISHING | Marine and Freshwater Research

View Source

Context

  • Region Australia
  • Biome Arid Inland Floodplains & Ephemeral River Systems
  • Land Use Livestock Grazing & Pasture
  • Assessment Conservation Target
  • Vegetation Woodland
  • Evidence Type HealthyOperationalRange

Lifecycle

  • Status Active
  • Version 1
  • Effective From 22 Mar 2026

Notes

This range supports both biodiversity and sustainable pasture production, avoiding critical loss and woody thickening.