Basal Area

AUS-TDG-CON-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 17 benchmarks together — the OptimalRange form drives the primary score, while 16 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary MinimumOnly Guard OptimalRange Guard OptimalRange Guard MinimumOnly Guard MaximumOnly Guard Point Guard LowerThreshold Guard OptimalRange Guard UpperThreshold Guard OptimalRange Guard OptimalRange Guard MinimumOnly Guard Point Guard OptimalRange Guard MinimumOnly Guard MaximumOnly Guard

Evidence & Context

The reference value for Temperate Dry Woodlands (2 - 8 m²/ha) is derived from a synthesis of structural characteristics of high-condition Box-Gum Grassy Woodlands, a key example of this biome.

Metric Definition:

Basal Area of tree stands in temperate dry woodlands

Benchmark Definition:

This benchmark defines the typical basal area range representing the best available condition for temperate dry woodlands, supporting healthy woodland structure and grassy understorey.

Justification:

Synthesized from multiple lines of evidence including national and state conservation advice, management guidelines, and research in managed conservation reserves.

Sources (2)

Preview of A guide to managing Box Gum Grassy Woodlands - DCCEEW, accessed August 4, 2025
A guide to managing Box Gum Grassy Woodlands - DCCEEW, accessed August 4, 2025 Journal

Manning, A. D., Cunningham, R. B., Tongway, D., & Lindenmayer, D. B. (2020). Woodlands and woody debris: Understanding structure and composition to inform restoration. PLoS ONE, 15(3), e0224258.

View Source
Preview of Approved Conservation Advice for the White Box - Yellow Box - Blakely's Red Gum Grassy Woodland and Derived Native Grassland - DCCEEW, accessed August 12, 2025,
Approved Conservation Advice for the White Box - Yellow Box - Blakely's Red Gum Grassy Woodland and Derived Native Grassland - DCCEEW, accessed August 12, 2025, Journal

Conservation Advice for Lowland Grassy Woodland in the South East Corner Bioregion

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Preview of Function Attribute Benchmarks for the Biodiversity Assessment Method: Data audit, compilation and analysis - Environment and Heritage, accessed July 10, 2025,
Function Attribute Benchmarks for the Biodiversity Assessment Method: Data audit, compilation and analysis - Environment and Heritage, accessed July 10, 2025,
Contextual Support

Victorian State of the Environment report

View Source
Preview of Offset Management Plan for Iron-grass Natural Temperate Grassland in South Australia
Offset Management Plan for Iron-grass Natural Temperate Grassland in South Australia
Contextual Support Journal

Offset Management Plan for Iron-grass Natural Temperate Grassland in South Australia

View Source

Context

  • Region Australia
  • Biome Temperate Dry Woodlands & Native Grasslands
  • Land Use Conservation / Protected Natural Areas
  • Assessment Conservation Target
  • Vegetation Temperate Dry Woodlands
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 9 Jun 2026

Notes

This range maintains a Foliage Projective Cover (FPC) typically less than 30%, crucial for the health and diversity of the grassy understorey.

Related Benchmarks

Other benchmarks in the AUS-TDG-CON-BAS family.

0 m²/ha High
Conservation / Protected Natural Areas · Conservation Target · Native Grasslands
Point Active v1
2 m²/ha Moderate
Conservation / Protected Natural Areas · Conservation Target · Temperate Dry Woodlands
MinimumOnly Active v1
10 m²/ha Low
Conservation / Protected Natural Areas · Conservation Target · Temperate Dry Woodlands
MaximumOnly Active v1