Ground Cover - Tree Canopy

AUS-TGP-CON-TCC General Moderate confidence

Benchmark Value

30 %
Thresholds: Lower: —, Upper: 30
Direction: Lower is desirable ↓
Form: MaximumOnly

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.

Contributing Benchmarks

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

Evidence & Context

Upper Detrimental Threshold: A tree canopy cover exceeding 30% is considered detrimental to the integrity of a temperate grassy woodland.

Metric Definition:

Tree Canopy Cover upper detrimental threshold marking onset of woody thickening and understorey loss

Benchmark Definition:

This benchmark defines the upper detrimental threshold of tree canopy cover at 30%, beyond which temperate grassy woodlands experience woody thickening and loss of understorey biodiversity.

Justification:

Exceeding 30% canopy cover leads to suppression and loss of the species-rich native grassy understorey, habitat degradation, and altered ecosystem functions.

Sources (1)

Preview of Conservation Assessment of White Box – Yellow Box – Blakely's Red Gum Grassy Woodland and Derived Native Grassland - Environment and Heritage - NSW Government, accessed August 12, 2025,
Conservation Assessment of White Box – Yellow Box – Blakely's Red Gum Grassy Woodland and Derived Native Grassland - Environment and Heritage - NSW Government, accessed August 12, 2025, Journal

www.lls.nsw.gov.au, accessed May 19, 2025

View Source

Supporting Sources (38)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Determining reference conditions for management and ..., accessed August 5, 2025,
(PDF) Determining reference conditions for management and ..., accessed August 5, 2025,
Contextual Support

(PDF) Impacts of tree invasion on floristic composition of subtropical grasslands on the Bunya Mountains, Australia - ResearchGate, accessed May 19, 2025

View Source
Preview of (PDF) Effect of tree canopy on species composition, diversity and biomass of herbaceous vegetation and soil characteristics in semi-arid forests of the Aravalli hills - ResearchGate, accessed August 12, 2025,
(PDF) Effect of tree canopy on species composition, diversity and biomass of herbaceous vegetation and soil characteristics in semi-arid forests of the Aravalli hills - ResearchGate, accessed August 12, 2025,
Contextual Support

Semi-arid woodlands (shrubby sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )

View Source
Preview of An assessment of the accuracy of satellite-derived woody and grass foliage cover estimates for Australia - CSIRO PUBLISHING | Australian Journal of Botany, accessed August 12, 2025,
An assessment of the accuracy of satellite-derived woody and grass foliage cover estimates for Australia - CSIRO PUBLISHING | Australian Journal of Botany, accessed August 12, 2025,
Methodology Source Journal

An assessment of the accuracy of satellite-derived woody and grass foliage cover estimates for Australia - CSIRO PUBLISHING | Australian Journal of Botany

View Source
Preview of Approved Conservation Advice for the White Box - Yellow Box - Blakely's Red Gum Grassy Woodland and Derived Native Grassland - DCCEEW, accessed August 12, 2025,
Approved Conservation Advice for the White Box - Yellow Box - Blakely's Red Gum Grassy Woodland and Derived Native Grassland - DCCEEW, accessed August 12, 2025,
Direct Evidence Journal

Conservation Advice for Lowland Grassy Woodland in the South East Corner Bioregion, accessed August 6, 2025

View Source
Preview of BioMetric: Vegetation condition benchmarks, short-term review, accessed August 10, 2025,
BioMetric: Vegetation condition benchmarks, short-term review, accessed August 10, 2025,
Direct Evidence

The importance of temperate woodland in travelling stock reserves ..., accessed August 12, 2025,

View Source
Preview of Box Gum Grassy Woodland: Social Study - Local Land Services, accessed August 12, 2025,
Box Gum Grassy Woodland: Social Study - Local Land Services, accessed August 12, 2025,
Contextual Support

Box Gum Grassy Woodland: Social Study - Local Land Services

View Source
Preview of Changes in conservation value from grasslands to savannas to forests: How a temperate canopy cover gradient affects butterfly community composition - PMC - PubMed Central, accessed August 12, 2025,
Changes in conservation value from grasslands to savannas to forests: How a temperate canopy cover gradient affects butterfly community composition - PMC - PubMed Central, accessed August 12, 2025,
Contextual Support Journal

Changes in conservation value from grasslands to savannas to forests: How a temperate canopy cover gradient affects butterfly community composition - PMC - PubMed Central

View Source
Preview of Conservation Advice for Lowland Grassy Woodland in the South East Corner Bioregion, accessed August 12, 2025,
Conservation Advice for Lowland Grassy Woodland in the South East Corner Bioregion, accessed August 12, 2025,
Contextual Support Journal

The Cumberland Plain and its vegetation - Environment and Heritage, accessed August 6, 2025

View Source
Preview of Distribution of Vegetation Integrity scores and expert judgements of... | Download Scientific Diagram - ResearchGate, accessed August 12, 2025,
Distribution of Vegetation Integrity scores and expert judgements of... | Download Scientific Diagram - ResearchGate, accessed August 12, 2025,
Contextual Support Journal

Distribution of Vegetation Integrity scores and expert judgements of... | Download Scientific Diagram - ResearchGate

View Source
Preview of Does the NSW vegetation integrity assessment underestimate the conservation values of derived native grasslands? - Western Sydney University, accessed August 12, 2025,
Does the NSW vegetation integrity assessment underestimate the conservation values of derived native grasslands? - Western Sydney University, accessed August 12, 2025,
Contextual Support

Does the NSW vegetation integrity assessment underestimate the conservation values of derived native grasslands? - Western Sydney University

View Source
Preview of DPU Eucalyptus pulchella forest and woodland: grassy facies (forest), accessed August 12, 2025,
DPU Eucalyptus pulchella forest and woodland: grassy facies (forest), accessed August 12, 2025,
Direct Evidence Journal

DPU Eucalyptus pulchella forest and woodland: grassy facies (forest)

View Source
Preview of Effects of Stock Grazing on Biodiversity Values in ... - ACT Government, accessed August 4, 2025
Effects of Stock Grazing on Biodiversity Values in ... - ACT Government, accessed August 4, 2025
Contextual Support Journal

Yellow Box – Blakely's Red Gum Grassy Woodland and Derived ...

View Source
Preview of Environmental Stewardship - Box Gum Grassy Woodland Project - Information Booklet - DCCEEW, accessed August 12, 2025,
Environmental Stewardship - Box Gum Grassy Woodland Project - Information Booklet - DCCEEW, accessed August 12, 2025,
Contextual Support Journal

Effects of Stock Grazing on Biodiversity Values in Temperate Native Grasslands and Grassy Woodlands in SE Australia: A Literature Review - ACT Government, accessed August 12, 2025,

View Source
Preview of Eucalypt woodlands Regrowth Benefits - Management Guideline - Queensland Government, accessed July 12, 2025,
Eucalypt woodlands Regrowth Benefits - Management Guideline - Queensland Government, accessed July 12, 2025,
Contextual Support Journal

Australia's forests – overview - DAFF, accessed April 29, 2025,

View Source
Preview of Forest and woodland structure as an index of biodiversity: a review - CiteSeerX, accessed August 10, 2025,
Forest and woodland structure as an index of biodiversity: a review - CiteSeerX, accessed August 10, 2025,
Contextual Support

Processes underpinning natural capital account compilation highlight the potential for low-input grazing to mitigate farm carbon emissions while also improving biodiversity outcomes - CSIRO Publishing, accessed May 19, 2025

View Source
Preview of Grassy eucalypt woodland of the Victorian volcanic plain - listing advice, accessed August 4, 2025
Grassy eucalypt woodland of the Victorian volcanic plain - listing advice, accessed August 4, 2025
Direct Evidence Journal

Grasslands and Grassy Woodlands of the VVP: Landholders Guide - Greening Australia, accessed August 4, 2025,

View Source
Preview of Grassy Woodlands - Local Land Services - NSW Government, accessed August 12, 2025,
Grassy Woodlands - Local Land Services - NSW Government, accessed August 12, 2025,
Contextual Support

Grassy Woodlands - Local Land Services - NSW Government, accessed August 12, 2025

View Source
Preview of Grassy woodlands | NSW Environment, Energy and Science, accessed August 12, 2025,
Grassy woodlands | NSW Environment, Energy and Science, accessed August 12, 2025,
Contextual Support

Grassy woodlands | NSW Environment, Energy and Science

View Source
Preview of How do fire regimes affect ecosystem structure, function and diversity in grasslands and grassy woodlands of southern Australia?, accessed August 10, 2025,
How do fire regimes affect ecosystem structure, function and diversity in grasslands and grassy woodlands of southern Australia?, accessed August 10, 2025,
Contextual Support

Soil | Australia state of the environment 2021

View Source
Preview of Identifying ecological barriers to restoration in temperate grassy woodlands: soil changes associated with different degradation states - ResearchGate, accessed August 5, 2025,
Identifying ecological barriers to restoration in temperate grassy woodlands: soil changes associated with different degradation states - ResearchGate, accessed August 5, 2025,
Contextual Support Journal

(PDF) Identifying ecological barriers to restoration in temperate grassy woodlands: soil changes associated with different degradation states - ResearchGate, accessed August 4, 2025,

View Source
Preview of Impact of a prolonged decline in rainfall on eucalypt woodlands in southwestern Australia and its consequences for avifauna - CSIRO Publishing, accessed August 12, 2025,
Impact of a prolonged decline in rainfall on eucalypt woodlands in southwestern Australia and its consequences for avifauna - CSIRO Publishing, accessed August 12, 2025,
Contextual Support

Impact of a prolonged decline in rainfall on eucalypt woodlands in southwestern Australia and its consequences for avifauna - CSIRO Publishing, accessed July 15, 2025,

View Source
Preview of Nationally Threatened Ecological Communities of the Victorian Volcanic Plain: Natural Temperate Grassland & Grassy Eucalypt Woodland - DCCEEW, accessed August 12, 2025,
Nationally Threatened Ecological Communities of the Victorian Volcanic Plain: Natural Temperate Grassland & Grassy Eucalypt Woodland - DCCEEW, accessed August 12, 2025,
Contextual Support Journal

Environmental Stewardship - Box Gum Grassy Woodland Project - Information Booklet - DCCEEW, accessed August 12, 2025,

View Source
Preview of Native Vegetation Integrity Benchmarks: An information sheet - Environment and Heritage, accessed August 12, 2025,
Native Vegetation Integrity Benchmarks: An information sheet - Environment and Heritage, accessed August 12, 2025,
Contextual Support

Vegetation Condition Benchmarks | Native vegetation | Environment ...

View Source
Preview of Natural Temperate Grassland of the South Eastern Highlands: a nationally protected ecological community - DCCEEW, accessed August 12, 2025,
Natural Temperate Grassland of the South Eastern Highlands: a nationally protected ecological community - DCCEEW, accessed August 12, 2025,
Contextual Support Journal

Australia's Native Vegetation Framework - DAFF

View Source
Preview of New England Grassy Woodlands | NSW Environment, Energy and Science, accessed August 12, 2025,
New England Grassy Woodlands | NSW Environment, Energy and Science, accessed August 12, 2025,
Contextual Support

New England Grassy Woodlands | NSW Environment, Energy and Science

View Source
Preview of Outcomes from the Workshop: Deriving Vegetation Canopy Cover Estimates - NCAS Technical Report No. 42 - DCCEEW, accessed August 12, 2025,
Outcomes from the Workshop: Deriving Vegetation Canopy Cover Estimates - NCAS Technical Report No. 42 - DCCEEW, accessed August 12, 2025,
Methodology Source Journal

Outcomes from the Workshop: Deriving Vegetation Canopy Cover Estimates - NCAS Technical Report No. 42 - DCCEEW

View Source
Preview of Recent initiatives in biodiversity conservation in grazed temperate grasslands and woodlands in Australia - UKnowledge, accessed August 12, 2025,
Recent initiatives in biodiversity conservation in grazed temperate grasslands and woodlands in Australia - UKnowledge, accessed August 12, 2025,
Contextual Support

Australia's forests – overview - DAFF, accessed July 7, 2025,

View Source
Preview of Restoration of eucalypt grassy woodland: effects of experimental interventions on ground-layer vegetation - CSIRO PUBLISHING | Australian Journal of Botany, accessed August 12, 2025,
Restoration of eucalypt grassy woodland: effects of experimental interventions on ground-layer vegetation - CSIRO PUBLISHING | Australian Journal of Botany, accessed August 12, 2025,
Contextual Support Direct Evidence Journal

Full article: Making soil carbon credits work for climate change mitigation

View Source
Preview of Restoring Australia's temperate grasslands and grassy woodlands | Request PDF - ResearchGate, accessed August 12, 2025,
Restoring Australia's temperate grasslands and grassy woodlands | Request PDF - ResearchGate, accessed August 12, 2025,
Contextual Support

Restoring Australia's temperate grasslands and grassy woodlands | Request PDF - ResearchGate, accessed May 19, 2025,

View Source
Preview of Temperate Grasslands - Greening Australia, accessed August 4, 2025
Temperate Grasslands - Greening Australia, accessed August 4, 2025
Contextual Support Journal

Managing natural areas | City of Gold Coast, accessed May 19, 2025

View Source
Preview of The importance of travelling stock reserves for maintaining high-quality threatened temperate woodlands - CSIRO PUBLISHING | Australian Journal of Botany, accessed August 12, 2025,
The importance of travelling stock reserves for maintaining high-quality threatened temperate woodlands - CSIRO PUBLISHING | Australian Journal of Botany, accessed August 12, 2025,
Contextual Support

Approved Conservation Advice for the White Box - Yellow Box - Blakely's Red Gum Grassy Woodland and Derived Native Grassland - DCCEEW, accessed August 6, 2025

View Source
Preview of The Value of Understorey Vegetation - Land for Wildlife, accessed August 12, 2025,
The Value of Understorey Vegetation - Land for Wildlife, accessed August 12, 2025,
Contextual Support

The Value of Understorey Vegetation - Land for Wildlife

View Source
Preview of Thinking Inside the Box Gum Grassy Woodland - Local Land Services, accessed August 12, 2025,
Thinking Inside the Box Gum Grassy Woodland - Local Land Services, accessed August 12, 2025,
Contextual Support Government

Thinking Inside the Box Gum Grassy Woodland - Local Land Services

View Source
Preview of Tree species influence woodland canopy characteristics and crown fire potential | Request PDF - ResearchGate, accessed August 12, 2025,
Tree species influence woodland canopy characteristics and crown fire potential | Request PDF - ResearchGate, accessed August 12, 2025,
Contextual Support Journal

Tree species influence woodland canopy characteristics and crown fire potential | Request PDF - ResearchGate

View Source
Preview of Vegetation change in an urban grassy woodland 1974–2000 - CSIRO Publishing, accessed August 12, 2025,
Vegetation change in an urban grassy woodland 1974–2000 - CSIRO Publishing, accessed August 12, 2025,
Contextual Support

Vegetation change in an urban grassy woodland 1974–2000 - CSIRO Publishing

View Source
Preview of Woodlands - DCCEEW
Woodlands - DCCEEW
Contextual Support

Woodlands - DCCEEW

Preview of Woodlands - DCCEEW, accessed August 5, 2025,
Woodlands - DCCEEW, accessed August 5, 2025,
Contextual Support

Woodlands - DCCEEW, accessed May 19, 2025

View Source
Preview of Yellow Box – Red Gum Grassy Woodland, accessed August 12, 2025,
Yellow Box – Red Gum Grassy Woodland, accessed August 12, 2025,
Contextual Support Journal

Box Gum Grassy Woodland - Local Land Services - NSW Government, accessed August 11, 2025

View Source

Context

  • Region Australia
  • Biome Temperate Grassy Woodlands & Plains
  • Land Use Conservation / Protected Natural Areas
  • Assessment Conservation Target
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 15 Mar 2026

Notes

This condition, often termed 'woody thickening,' leads to a transition towards a closed-forest state, inconsistent with a healthy grassy woodland.

Related Benchmarks

Other benchmarks in the AUS-TGP-CON-TCC family.

— % Moderate
Conservation / Protected Natural Areas · Conservation Target
OptimalRange Active v2
— % High
Conservation / Protected Natural Areas · Conservation Target
OptimalRange Superseded v1