Basal Area — Benchmark Detail

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 18 benchmarks together — the OptimalRange form drives the primary score, while 17 guard(s) constrain the result.

Contributing Benchmarks

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

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:

Optimal functional range of tree basal area balancing facilitation and competition in grazed arid woodlands.

Benchmark Definition:

This benchmark defines the range of tree basal area values that support both biodiversity and sustainable pasture production in grazed arid woodlands.

Justification:

Synthesized from functional range analysis and management guidelines indicating balance between facilitative and competitive effects of trees.

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

Rates of erosion and sediment transport in Australia - INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES

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 Not Stated
Evidence Type HealthyOperationalRange

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

This range represents a healthy, functional savanna woodland structure supporting ecological integrity and pastoral productivity. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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