Ground Cover - Tree Canopy

AUS-TSR-CON-TCC General High confidence

Benchmark Value

No specific value — see range
Range: 70 to 90 %
Optimal Range: 70 to 90
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

Therefore, a representative range for high-health, well-developed Tropical and Subtropical Rainforests in conservation areas is 70-90% TCC.

Metric Definition:

Tree Canopy Cover (TCC): This metric is defined as the percentage of ground area covered by the vertical projection of the outermost perimeter of tree crowns.

Benchmark Definition:

Tree Canopy Cover (TCC) in Tropical and Subtropical Rainforests conservation areas represents the percentage of ground covered by tree crowns, with 70-90% indicating a high-health, well-developed canopy.

Justification:

This range is derived from field data and is corroborated by monitoring of high-quality conservation offset sites showing TCC of 70-98%.

Sources (4)

Preview of Approved Conservation Advice for the Lowland tropical rainforest of ...
Approved Conservation Advice for the Lowland tropical rainforest of ...

Approved Conservation Advice for the Lowland tropical rainforest of ...

View Source
Preview of BioCondition benchmarks | Environment, land and water ..., accessed August 3, 2025,
BioCondition benchmarks | Environment, land and water ..., accessed August 3, 2025, Government

Appendix E TEC Lowland rainforest offset area monitoring report year 1 - Transport and Main Roads

View Source
Preview of BioCondition Benchmarks for Regional Ecosystem ... - WordPress.com, accessed August 3, 2025,
BioCondition Benchmarks for Regional Ecosystem ... - WordPress.com, accessed August 3, 2025, Journal

BioCondition Benchmarks for Regional Ecosystem Condition Assessment - South East Queensland Bioregion

View Source
Preview of Rampaging vines are slowly strangling tropical forests - Science News Explores
Rampaging vines are slowly strangling tropical forests - Science News Explores Journal

Approved Conservation Advice for the Lowland tropical rainforest of the Wet Tropics ecological community

View Source

Supporting Sources (1)

Additional references from the underlying research that informed this benchmark.

Preview of BioCondition: A condition assessment framework for terrestrial ...
BioCondition: A condition assessment framework for terrestrial ...
Methodology Source Journal

BioCondition: A condition assessment framework for terrestrial ...

View Source

Context

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

Lifecycle

  • Status Superseded
  • Version 1
  • Effective From 24 Mar 2026
  • Effective To 24 Mar 2026

Notes

Lower Critical Threshold: TCC <50% indicates a significantly degraded state. Optimal Range: 70-95% TCC represents optimal habitat structure and function. Upper Detrimental Threshold: No quantitative upper threshold; qualitative assessment required due to invasive lianas.