Basal Area

AUS-TMI-CON-BAS General Moderate confidence

Benchmark Value

50 m²/ha
Direction: Higher is desirable ↑
Form: UpperThreshold

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.

Evidence & Context

Values significantly exceeding 45-50 m²/ha may indicate a stand under high competitive stress and increased vulnerability to climate-driven drought, representing a potential detrimental upper threshold.

Metric Definition:

Basal area range above which ecosystem resilience is compromised due to competitive stress

Benchmark Definition:

An upper basal area threshold above which forest stands experience increased competitive stress and vulnerability to climate-driven drought in tropical & subtropical maritime islands under conservation management.

Justification:

Based on evidence linking high basal area to intense competition and increased mortality risk under climate stress.

Sources (1)

Preview of Managing drought-sensitive forests under global change. Low competition enhances long-term growth and water uptake in Abies pinsapo | Request PDF - ResearchGate
Managing drought-sensitive forests under global change. Low competition enhances long-term growth and water uptake in Abies pinsapo | Request PDF - ResearchGate Journal

Managing drought-sensitive forests under global change. Low competition enhances long-term growth and water uptake in Abies pinsapo | Request PDF - ResearchGate

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Thresholds of biodiversity and ecosystem function in a forest ...
(PDF) Thresholds of biodiversity and ecosystem function in a forest ...
Contextual Support GreyLiterature

(PDF) Thresholds of biodiversity and ecosystem function in a forest ...

View Source
Preview of Vegetation and floristics of a lowland tropical rainforest in northeast Australia - Biodiversity Data Journal
Vegetation and floristics of a lowland tropical rainforest in northeast Australia - Biodiversity Data Journal
Direct Evidence Journal

Vegetation and floristics of a lowland tropical rainforest in northeast Australia - Biodiversity Data Journal

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Maritime Islands
  • Land Use Conservation / Protected Natural Areas
  • Assessment Conservation Target
  • Vegetation Forest
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 7 Jun 2026

Notes

Such stands may lack physiological safety margins to withstand future climate shocks.