Ground Cover - Tree Canopy

AUS-AKW-LVG-TCC General Moderate confidence

Benchmark Value

0 %

Thresholds: Lower: 0, Upper: —

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 11 benchmarks together — the OptimalRange form drives the primary score, while 10 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

Therefore, the lower critical threshold for tree canopy cover is effectively `$>$0%.

Metric Definition:

Tree Canopy Cover percentage

Benchmark Definition:

The minimum tree canopy cover percentage to prevent functional collapse in Arid Karstic Woodlands & Shrublands, where near zero cover indicates ecosystem degradation.

Justification:

The woody stratum provides a persistent structural backbone essential for soil stability; near zero cover leads to ecosystem degradation.

Sources (1)

Preview of Nullarbor bioregion - DCCEEW, accessed July 27, 2025

Nullarbor bioregion - DCCEEW, accessed July 27, 2025 Journal

(PDF) Soil potassium—crop response calibration relationships and ..., accessed July 24, 2025

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

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

Direct Evidence Journal

Revision of the Interim Biogeographic Regionalisation of Australia (IBRA) and the Development of Version 5.1 - Summary Report - DCCEEW, accessed July 15, 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, accessed July 24, 2025

View Source

Context

Region Australia
Biome Arid Karstic Woodlands & Shrublands
Land Use Livestock Grazing & Pasture
Assessment Pristine Reference
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 19 Mar 2026

Notes

Approaching zero tree and perennial shrub cover indicates a functionally collapsed, degrading state.

Related Benchmarks

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