Basal Area

AUS-TMS-FOR-BAS General Moderate confidence

Benchmark Value

No specific value — see range
Range: 8 to 12 m²/ha
Thresholds: Lower: 4, Upper: —
Optimal Range: 8 to 12
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 12 benchmarks together — the OptimalRange form drives the primary score, while 11 guard(s) constrain the result.

Evidence & Context

Based on the analysis of available scientific literature pertaining to Australian Tropical Monsoonal Savannas, a Basal Area range of 8-12 m²/ha (representing stands with a significant component of trees >10-20 cm DBH) is proposed as a reference benchmark.

Metric Definition:

Basal Area (BA) quantifies the cross-sectional area of tree stems at breast height per unit of ground area, reflecting stand density, average tree size, accumulated biomass, and overall forest structure.

Benchmark Definition:

This benchmark represents the typical basal area range of 8 to 12 m²/ha in sustainably managed production forestry within Australian Tropical Monsoonal Savannas, indicating high environmental health and structural complexity.

Justification:

The 8-12 m²/ha range (for stems typically >10-20 cm DBH) is derived from well-studied, healthy tropical monsoonal savanna sites and represents high structural development and ecological integrity under best-practice production forestry.

Sources (2)

Preview of Hutley, L. B., et al. (2011) Patterns and processes of carbon, water and energy cycles...
Hutley, L. B., et al. (2011) Patterns and processes of carbon, water and energy cycles... Journal

Hutley, L. B., et al. (2011) Patterns and processes of carbon, water and energy cycles...

View Source
Preview of Karan, M. et al. (2016) The Australian SuperSite Network...
Karan, M. et al. (2016) The Australian SuperSite Network... Journal

Karan, M. et al. (2016) The Australian SuperSite Network...

View Source

Supporting Sources (3)

Additional references from the underlying research that informed this benchmark.

Preview of Fire exclusion and the changing landscape of Queensland's Wet Tropics Bioregion 1. The extent and pattern of transition - ResearchGate
Fire exclusion and the changing landscape of Queensland's Wet Tropics Bioregion 1. The extent and pattern of transition - ResearchGate
Contextual Support GreyLiterature

Fire exclusion and the changing landscape of Queensland's Wet Tropics Bioregion 1. The extent and pattern of transition - ResearchGate

View Source
Preview of Ironwood Erythrophleum chlorostachys in the Northern Territory ...
Ironwood Erythrophleum chlorostachys in the Northern Territory ...
Contextual Support Journal

Ironwood Erythrophleum chlorostachys in the Northern Territory ...

View Source
Preview of The Science Behind Mining - Aluminium Stewardship Initiative, accessed May 16, 2025,
The Science Behind Mining - Aluminium Stewardship Initiative, accessed May 16, 2025,
Contextual Support Journal

aluminium-stewardship.org

View Source

Context

  • Region Australia
  • Biome Tropical Monsoonal Savannas
  • Land Use Production Forestry
  • Assessment Pristine Reference
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 25 Mar 2026

Notes

Lower Critical Threshold: 4 m²/ha. No upper detrimental threshold — higher values are always better up to natural saturation.

Related Benchmarks

Other benchmarks in the AUS-TMS-FOR-BAS family.