Basal Area — Benchmark Detail

Benchmark Value

1 m²/ha

Direction: Higher is desirable ↑

Form: MinimumOnly

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

Contributing Benchmarks

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

Evidence & Context

This calculation suggests that a Basal Area of approximately 1.0 m²/ha represents the lower critical threshold.

Metric Definition:

Basal Area (m²/ha) as a measure of woody vegetation structure

Benchmark Definition:

This is the lower critical threshold of Basal Area below which essential ecosystem services fail in arid shrublands under agricultural crop production.

Justification:

Derived from landscape ecology principles linking woody cover to ecosystem function and connectivity.

Sources (10)

ARS Broome 2023 - EventsAir

ARS Broome 2023 - EventsAir

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Preview of Australia state of the environment 2021: land, accessed May 11, 2025

Australia state of the environment 2021: land, accessed May 11, 2025 Journal

Buffel grass in Queensland's semi-arid woodlands - CSIRO Publishing, accessed July 13, 2025

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Preview of Australia's Native Vegetation Framework - DAFF, accessed August 6, 2025,

Australia's Native Vegetation Framework - DAFF, accessed August 6, 2025, Journal

risks and impacts of plant industries on soil condition - Department of Agriculture and Fisheries

View Source

Biodiversity - Environment and Heritage, accessed July 8, 2025

Australia state of the environment 2021: land

View Source

BIODIVERSITY - EPA, South Australia Journal

BIODIVERSITY - EPA, South Australia

View Source

Description of Ecological Communities: Arid Eucalypt Woodlands - NEC 1.8 to 1.13 - DCCEEW, accessed July 23, 2025 Journal

Description of Ecological Communities: Arid Eucalypt Woodlands - NEC 1.8 to 1.13 - DCCEEW

View Source

Preview of Maximizing retention of native biodiversity in Australian agricultural ...

Maximizing retention of native biodiversity in Australian agricultural ... Journal

Does grazing exclusion in Australia's rangelands affect biomass and debris carbon stocks? - CSIRO Publishing, accessed April 29, 2025,

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Productivity of Mallee Agroforestry Systems - — The ... - DBCA Library Journal

Productivity of Mallee Agroforestry Systems - — The ... - DBCA Library

View Source

Preview of Quantifying vegetation and canopy structural complexity from terrestrial LiDAR data using the forestr R package | Request PDF - ResearchGate

Quantifying vegetation and canopy structural complexity from terrestrial LiDAR data using the forestr R package | Request PDF - ResearchGate Journal

Quantifying vegetation and canopy structural complexity from terrestrial LiDAR data using the forestr R package | Request PDF - ResearchGate

View Source

Preview of The Rangeland Journal - CSIRO PUBLISHING, accessed July 6, 2025,

The Rangeland Journal - CSIRO PUBLISHING, accessed July 6, 2025, Journal

Does grazing exclusion in Australia's rangelands affect biomass and debris carbon stocks? - CSIRO Publishing

View Source

Context

Region Australia
Biome Arid Shrublands & Stony Plains
Land Use Agricultural Crop Production
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

Below this threshold, woody vegetation is too sparse to maintain essential ecosystem services like landscape connectivity and soil stability. No upper detrimental threshold — higher values are always better up to natural saturation. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-ASP-AGR-BAS family.