Ground Cover - Tree Canopy

AUS-AKW-LVG-TCC General Moderate confidence

Benchmark Value

0 %

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

Evidence & Context

Therefore, the lower critical threshold for tree canopy cover is effectively `$>$0%. A state approaching zero tree and perennial shrub cover is indicative of a system that has crossed a critical threshold into a functionally collapsed, degrading state.

Metric Definition:

Tree Canopy Cover as percentage of foliage projective cover

Benchmark Definition:

This benchmark defines the minimum tree canopy cover threshold below which ecosystem function and soil stability are critically compromised in Arid Karstic Woodlands & Shrublands under livestock grazing.

Justification:

Based on evidence that loss of woody stratum to near zero compromises ecosystem function and soil stability.

Sources (1)

An inventory and condition survey of the Western Australian part of ... Journal

An inventory and condition survey of the Western Australian part of ...

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Nullarbor bioregion - DCCEEW, accessed July 27, 2025

Direct Evidence Journal

Nullarbor bioregion - DCCEEW, accessed July 24, 2025

View Source

NVIS Fact sheet MVG 11 – Eucalypt open woodlands - DCCEEW, accessed August 12, 2025,

Contextual Support Journal

NVIS Fact sheet MVG 11 – Eucalypt open woodlands - DCCEEW

View Source

Context

Region Australia
Biome Arid Karstic Woodlands & Shrublands
Land Use Livestock Grazing & Pasture
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 4 Jun 2026

Notes

Approaching 0% tree canopy cover is critically low and indicative of functional collapse and degradation. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-AKW-LVG-TCC family.