Ground Cover - Tree Canopy

AUS-TDG-CON-TCC General High confidence

Benchmark Value

No specific value — see range
Thresholds: Lower: 10, 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 12 benchmarks together — the OptimalRange form drives the primary score, while 11 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

Considering these points, a Lower Critical Threshold of 10-15% TCC is proposed.

Metric Definition:

Tree Canopy Cover (TCC) is the percentage of the ground area shaded by the vertical projection of tree crowns.

Benchmark Definition:

A lower critical threshold of 10-15% Tree Canopy Cover (TCC) indicates significant loss of woodland character and transition towards grassland in Temperate Dry Woodlands & Native Grasslands under conservation management.

Justification:

Below 20% TCC is below the structural definition of woodland; below 10-15% indicates loss of woodland character and transition to grassland.

Sources (3)

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

EPBC Act Policy Statement 3.7: Peppermint Box (Eucalyptus odorata) Grassy Woodland of South Australia and Iron-grass Natural Temperate Grassland of South Australia

View Source
Preview of National Forest Inventory definitions as reported in "Australia's State of the Forests Report" series
National Forest Inventory definitions as reported in "Australia's State of the Forests Report" series Government

NSW BioNet Vegetation Condition Benchmarks V1.2

View Source
Preview of Natural Temperate Grassland - ACT Government, accessed May 19, 2025
Natural Temperate Grassland - ACT Government, accessed May 19, 2025 Journal

Natural Temperate Grassland Endangered Ecological Community Action Plan - ACT Government

View Source

Supporting Sources (26)

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 Journal

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

View Source
Preview of (PDF) The Great Western Woodlands TERN SuperSite: ecosystem ..., accessed May 19, 2025
(PDF) The Great Western Woodlands TERN SuperSite: ecosystem ..., accessed May 19, 2025
Contextual Support Journal

(PDF) The Great Western Woodlands TERN SuperSite: ecosystem ..., accessed May 19, 2025

View Source
Preview of ausplotsR: TERN AusPlots Australian Ecosystem Monitoring Data - The Comprehensive R Archive Network, accessed July 15, 2025
ausplotsR: TERN AusPlots Australian Ecosystem Monitoring Data - The Comprehensive R Archive Network, accessed July 15, 2025
Contextual Support Journal

ASC - CHROMOSOLS - Soil Science Australia

View Source
Preview of Australia's forests – overview - DAFF, accessed on May 25, 2025,
Australia's forests – overview - DAFF, accessed on May 25, 2025,
Contextual Support Government

Resistance and resilience of the forest soil microbiome to logging-associated compaction

View Source
Preview of Australian forest profile, accessed May 15, 2025,
Australian forest profile, accessed May 15, 2025,
Contextual Support Journal

Australian forest profile

View Source
Preview of BioCondition: A condition assessment framework for terrestrial biodiversity in Queensland, accessed August 12, 2025,
BioCondition: A condition assessment framework for terrestrial biodiversity in Queensland, accessed August 12, 2025,
Contextual Support

Melbourne Water stream network: user's manual - 7 Tree canopy cover, accessed May 19, 2025

View Source
Preview of Biodiversity Conservation Trust Ecological Thinning Guidelines, accessed July 12, 2025,
Biodiversity Conservation Trust Ecological Thinning Guidelines, accessed July 12, 2025,
Contextual Support

Estimating the relative magnitude of expected increases in soil ...

View Source
Preview of Biodiversity Conservation Trust Ecological Thinning Guidelines, accessed May 19, 2025
Biodiversity Conservation Trust Ecological Thinning Guidelines, accessed May 19, 2025
Contextual Support Journal

Biodiversity Conservation Trust Ecological Thinning Guidelines

View Source
Preview of Conservation and land management 101: keeping Queensland's protected areas safe, accessed May 19, 2025
Conservation and land management 101: keeping Queensland's protected areas safe, accessed May 19, 2025
Contextual Support Government

Conservation and land management 101: keeping Queensland's protected areas safe, accessed May 19, 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

Forest and woodland stand structural complexity: Its definition ...

View Source
Preview of Function Attribute Benchmarks for the Biodiversity Assessment Method: Data audit, compilation and analysis - Environment and Heritage, accessed July 10, 2025,
Function Attribute Benchmarks for the Biodiversity Assessment Method: Data audit, compilation and analysis - Environment and Heritage, accessed July 10, 2025,
Contextual Support

Victorian State of the Environment report

View Source
Preview of Global meta-analysis: Sparse tree cover increases grass biomass in dry pastures - Frontiers, accessed May 19, 2025
Global meta-analysis: Sparse tree cover increases grass biomass in dry pastures - Frontiers, accessed May 19, 2025
Contextual Support Journal

Global meta-analysis: Sparse tree cover increases grass biomass in dry pastures - Frontiers, accessed May 19, 2025

View Source
Preview of Impacts of shrub encroachment on ecosystem structure and functioning: towards a global synthesis - PubMed Central, accessed July 12, 2025,
Impacts of shrub encroachment on ecosystem structure and functioning: towards a global synthesis - PubMed Central, accessed July 12, 2025,
Contextual Support

Carbon sequestration in forests and woodlands (savannas)., accessed July 15, 2025

View Source
Preview of Melbourne Water stream network: user's manual - 7 Tree canopy cover, accessed on May 25, 2025,
Melbourne Water stream network: user's manual - 7 Tree canopy cover, accessed on May 25, 2025,
Contextual Support Government

Impacts of shrub encroachment on ecosystem structure and functioning: towards a global synthesis - PubMed Central, accessed May 19, 2025

View Source
Preview of Native forests and woodlands | Natural Capital Measurement Catalogue, accessed July 10, 2025,
Native forests and woodlands | Natural Capital Measurement Catalogue, accessed July 10, 2025,
Contextual Support GreyLiterature

Biodiversity Conservation Trust Restoring Native Vegetation, accessed May 19, 2025

View Source
Preview of Native forests and woodlands | Natural Capital Measurement Catalogue, accessed May 19, 2025
Native forests and woodlands | Natural Capital Measurement Catalogue, accessed May 19, 2025
Contextual Support Journal

Native forests and woodlands | Natural Capital Measurement Catalogue, accessed May 19, 2025

View Source
Preview of Natural Temperate Grassland - ACT Government, accessed August 5, 2025,
Natural Temperate Grassland - ACT Government, accessed August 5, 2025,
Contextual Support Government

The phosphorus and nitrogen requirements of temperate pasture species and their influence on grassland botanical composition - The Australian National University

View Source
Preview of Peppermint Box (Eucalyptus odorata) Grassy Woodland ... - DCCEEW, accessed May 19, 2025
Peppermint Box (Eucalyptus odorata) Grassy Woodland ... - DCCEEW, accessed May 19, 2025
Contextual Support Journal

Peppermint Box (Eucalyptus odorata) Grassy Woodland of South Australia and Iron-grass Natural Temperate Grassland of South Austr - DCCEEW

View Source
Preview of 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 | The Rangeland Journal, accessed August 12, 2025,
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 | The Rangeland Journal, accessed August 12, 2025,
Contextual Support Journal

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

View Source
Preview of Protect remnant vegetation – ANU Sustainable Farms, accessed August 4, 2025
Protect remnant vegetation – ANU Sustainable Farms, accessed August 4, 2025
Contextual Support GreyLiterature

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 Pulsford, I. (2017). The response of Callitris glaucophylla – Eucalyptus albens woodland to exclusion of mammalian herbivores in Kosciuszko National Park, NSW. Master's Thesis, Australian National University.
Pulsford, I. (2017). The response of Callitris glaucophylla – Eucalyptus albens woodland to exclusion of mammalian herbivores in Kosciuszko National Park, NSW. Master's Thesis, Australian National University.
Contextual Support GreyLiterature

Pulsford, I. (2017). The response of Callitris glaucophylla – Eucalyptus albens woodland to exclusion of mammalian herbivores in Kosciuszko National Park, NSW. Master's Thesis, Australian National University.

View Source
Preview of Restoration of temperate savannas and woodlands - Forest Service, accessed August 6, 2025,
Restoration of temperate savannas and woodlands - Forest Service, accessed August 6, 2025,
Contextual Support

Function Attribute Benchmarks for the Biodiversity Assessment ..., accessed May 15, 2025

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

Plant nutrients in the soil - NSW Department of Primary Industries

View Source
Preview of TERN - Australia's Terrestrial Ecosystem Research Network, accessed July 30, 2025,
TERN - Australia's Terrestrial Ecosystem Research Network, accessed July 30, 2025,
Contextual Support Government

Australia's State of the Forests Report 2018 - DAFF, accessed July 31, 2025,

View Source
Preview of Vegetation Condition Benchmarks V1.2
Vegetation Condition Benchmarks V1.2
Contextual Support Government

Vegetation Condition Benchmarks V1.2

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

Woodlands - DCCEEW, accessed August 4, 2025,

View Source

Context

  • Region Australia
  • Biome Temperate Dry Woodlands & Native Grasslands
  • Land Use Conservation / Protected Natural Areas
  • Assessment Conservation Target
  • Vegetation Woodland
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 10 Jun 2026

Notes

Persistent TCC below 10-15% signifies significant compromise of conservation objectives for woodland habitat.

Related Benchmarks

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

— % High
Conservation / Protected Natural Areas · Conservation Target · Woodland
OptimalRange Active v1
50 % High
Conservation / Protected Natural Areas · Conservation Target · Woodland
MaximumOnly Active v1