Litter Cover

AUS-AKW-URB-LIT General Moderate confidence

Benchmark Value

20 %

Thresholds: Lower: 20, Upper: —

Direction: Higher is desirable ↑

Form: LowerThreshold

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 MinimumOnly Guard MinimumOnly Guard LowerThreshold Guard LowerThreshold Guard UpperThreshold Guard Point Guard MinimumOnly Guard LowerThreshold Guard OptimalRange Guard OptimalRange Guard

Evidence & Context

Threshold Type Value / Range (%) Primary Ecological Driver(s) Key Citations Lower Critical < 20 Risk of soil erosion; failure to maintain >50% total ground cover; loss of soil moisture and nutrients. 1

Metric Definition:

Litter Cover (%)

Benchmark Definition:

Critical lower threshold for litter cover to prevent soil erosion and maintain >50% total ground cover in Arid Karstic Woodlands & Shrublands under Urban & Developed Use.

Justification:

An extensive body of research from Australian government agencies and rangeland scientists consistently identifies a minimum of 50% total ground cover as the threshold required to protect soil from wind erosion. The litter cover below 20% is insufficient to contribute to this stability.

Sources (1)

Maintain and improve groundcover - Local Land Services, accessed July 27, 2025

Norfolk Island Environmental Assessment Executive Summary, accessed August 3, 2025

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Litter accumulation and fire risks show direct and indirect climate ...

Contextual Support Journal

Litter accumulation and fire risks show direct and indirect climate ..., accessed July 26, 2025,

View Source

TERN - Australia's Terrestrial Ecosystem Research Network, accessed July 30, 2025,

Direct Evidence GreyLiterature

The Great Western Woodlands TERN SuperSite: ecosystem monitoring infrastructure and key science learnings, accessed May 19, 2025

View Source

Context

Region Australia
Biome Arid Karstic Woodlands & Shrublands
Land Use Urban & Developed Use
Assessment Pristine Reference
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 20 Mar 2026

Notes

Below 20% litter cover risks erosion and loss of soil moisture and nutrients.

Related Benchmarks

Other benchmarks in the AUS-AKW-URB-LIT family.