Basal Area — Benchmark Detail

Benchmark Value

5.1 m²/ha

Direction: Higher is desirable ↑

Form: Point

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.

Contributing Benchmarks

OptimalRange Primary Point Guard Point Guard MaximumOnly Guard Point Guard OptimalRange Guard

Evidence & Context

The primary finding identifies a benchmark value of 5.1 m²/ha. This value is derived from field measurements in a comparable, long-term grazed semi-arid woodland system under improved management practices, representing a state of high ecological function that is compatible with sustainable pastoral production.

Metric Definition:

Tree basal area measured as the cross-sectional area of tree stems per hectare in a grazed semi-arid woodland system.

Benchmark Definition:

Tree basal area as a measure of woody vegetation structure in grazed arid floodplain woodlands.

Justification:

Selected based on a recent, peer-reviewed field measurement from a long-term grazed semi-arid woodland under improved management, representing best-on-offer condition.

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.

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

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 TargetCondition

Lifecycle

Status Active
Version 1
Effective From 22 Mar 2026

Notes

This benchmark reflects a balance between ecological function and sustainable pastoral production, positioned within an optimal functional range that avoids both critical loss and detrimental woody thickening.

Related Benchmarks

Other benchmarks in the AUS-AIF-LVG-BAS family.