Ground Cover - Tree Canopy

AUS-TMI-FOR-TCC General Moderate confidence

Benchmark Value

No specific value — see range
Range: 50 to 80 %
Optimal Range: 50 to 80
Direction: Higher is desirable ↑
Form: OptimalRange

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 9 benchmarks together — the OptimalRange form drives the primary score, while 8 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

The proposed benchmark for the optimal condition in a sustainably managed production forestry in this biome is 50–80%.

Metric Definition:

crown cover, which is the percentage of the ground shaded by tree canopies

Benchmark Definition:

A derived optimal range representing a healthy, resilient, and productive "Open Forest" structure.

Justification:

This range is synthesized from a robust analysis of best-practice proxies, primarily the minimum basal area retention targets (12–18 m²/ha) specified in the NSW Private Native Forestry Code of Practice for analogous subtropical eucalypt forests.

Sources (1)

Preview of Australia's State of the Forests Report Synthesis 2023
Australia's State of the Forests Report Synthesis 2023
View Source

Supporting Sources (36)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Climate change and tropical forests - ResearchGate, accessed July 31, 2025
(PDF) Climate change and tropical forests - ResearchGate, accessed July 31, 2025
Contextual Support GreyLiterature

Report shows benefits of sustainable wood harvesting in native forests, accessed July 31, 2025

View Source
Preview of (PDF) Effects of site productive capacity and stand density management on the maximum density line for Eucalyptus pilularis (blackbutt) - ResearchGate, accessed July 31, 2025
(PDF) Effects of site productive capacity and stand density management on the maximum density line for Eucalyptus pilularis (blackbutt) - ResearchGate, accessed July 31, 2025
Contextual Support Methodology Source Journal

Private Native Forestry Code of Practice for Northern NSW, accessed July 31, 2025

View Source
Preview of (PDF) Reduced-impact logging: Challenges and opportunities - ResearchGate, accessed July 31, 2025
(PDF) Reduced-impact logging: Challenges and opportunities - ResearchGate, accessed July 31, 2025
Contextual Support Methodology Source Journal

Reduced-impact logging: Challenges and opportunities - ResearchGate

View Source
Preview of Additional Information: Forestry and mining operations on the Tiwi Islands, accessed July 31, 2025
Additional Information: Forestry and mining operations on the Tiwi Islands, accessed July 31, 2025
Contextual Support Journal

Tiwi-led Forestry Project to Boost Estate and Double Exports - Wood Central, accessed July 30, 2025

View Source
Preview of Allometric relationships and community biomass estimates for some dominant eucalypts in Central Queensland woodlands - ResearchGate, accessed July 31, 2025
Allometric relationships and community biomass estimates for some dominant eucalypts in Central Queensland woodlands - ResearchGate, accessed July 31, 2025
Contextual Support Methodology Source Journal

(PDF) Effects of site productive capacity and stand density management on the maximum density line for Eucalyptus pilularis (blackbutt) - ResearchGate, accessed July 31, 2025

View Source
Preview of Araucaria heterophylla - Wikipedia, accessed July 31, 2025
Araucaria heterophylla - Wikipedia, accessed July 31, 2025
Contextual Support GreyLiterature

Lord Howe Island - Wikipedia, accessed July 31, 2025

View Source
Preview of Asia-Pacific roadmap for primary forest conservation - OceanRep, accessed July 31, 2025
Asia-Pacific roadmap for primary forest conservation - OceanRep, accessed July 31, 2025
Contextual Support Journal

Asia-Pacific roadmap for primary forest conservation - OceanRep, accessed July 31, 2025

View Source
Preview of Australia's State of the Forests Report Synthesis 2023, accessed May 15, 2025,
Australia's State of the Forests Report Synthesis 2023, accessed May 15, 2025,
Direct Evidence Journal

Australia's Framework of Criteria and Indicators - DAFF

View Source
Preview of Chapter 2 - Parliament of Australia, accessed July 31, 2025
Chapter 2 - Parliament of Australia, accessed July 31, 2025
Contextual Support Irrelevant Government

Chapter 2 - Parliament of Australia, accessed July 31, 2025,

View Source
Preview of Conservation | Lord Howe Island, accessed August 3, 2025,
Conservation | Lord Howe Island, accessed August 3, 2025,
Contextual Support

History | Christmas Island National Park | Parks Australia

View Source
Preview of Forest canopy damage and recovery in reduced-impact and conventional selective logging in eastern Para, Brazil, accessed July 31, 2025
Forest canopy damage and recovery in reduced-impact and conventional selective logging in eastern Para, Brazil, accessed July 31, 2025
Contextual Support

Forest canopy damage and recovery in reduced-impact and conventional selective logging in eastern Para, Brazil, accessed July 31, 2025,

View Source
Preview of Forest Ecology and Management Reduced-impact logging: Challenges and opportunities, accessed July 31, 2025
Forest Ecology and Management Reduced-impact logging: Challenges and opportunities, accessed July 31, 2025
Contextual Support

Australia's State of the Forests Report, accessed July 21, 2025

View Source
Preview of Improved forest management - CSIRO, accessed July 12, 2025,
Improved forest management - CSIRO, accessed July 12, 2025,
Contextual Support Government

Ecosystem wicks: Woodland trees enhance water infiltration in a fragmented agricultural landscape in eastern Australia, accessed May 15, 2025,

View Source
Preview of Improved Tropical Forest Management for Carbon Retention | PLOS Biology, accessed July 31, 2025
Improved Tropical Forest Management for Carbon Retention | PLOS Biology, accessed July 31, 2025
Contextual Support Journal

Minimizing Risks of Invasive Alien Plant Species in Tropical Production Forest Management, accessed July 31, 2025

View Source
Preview of Lord Howe Island - Wikipedia, accessed July 30, 2025,
Lord Howe Island - Wikipedia, accessed July 30, 2025,
Contextual Support GreyLiterature

Lord Howe Island - Wikipedia

View Source
Preview of Lord Howe Island Group - UNESCO World Heritage Centre, accessed August 3, 2025,
Lord Howe Island Group - UNESCO World Heritage Centre, accessed August 3, 2025,
Contextual Support

Lord Howe Island Group - UNESCO World Heritage Centre

View Source
Preview of Lord Howe Island subtropical forests | EBSCO Research Starters, accessed August 3, 2025,
Lord Howe Island subtropical forests | EBSCO Research Starters, accessed August 3, 2025,
Contextual Support

Norfolk Island Plant Communities - Jerry Coleby-Williams

View Source
Preview of Minimizing Risks of Invasive Alien Plant Species in Tropical Production Forest Management, accessed July 31, 2025
Minimizing Risks of Invasive Alien Plant Species in Tropical Production Forest Management, accessed July 31, 2025
Contextual Support Journal

Minimizing Risks of Invasive Alien Plant Species in Tropical Production Forest Management, accessed July 31, 2025,

View Source
Preview of News Hub | Wood Central Updates, accessed July 31, 2025
News Hub | Wood Central Updates, accessed July 31, 2025
Contextual Support Irrelevant

News Hub | Wood Central Updates, accessed July 31, 2025,

View Source
Preview of Norfolk Island - FAO Knowledge Repository, accessed July 31, 2025
Norfolk Island - FAO Knowledge Repository, accessed July 31, 2025
Contextual Support Journal

Norfolk Island - FAO Knowledge Repository, accessed July 31, 2025,

View Source
Preview of Pacific 2020 - Department of Foreign Affairs and Trade, accessed July 31, 2025
Pacific 2020 - Department of Foreign Affairs and Trade, accessed July 31, 2025
Contextual Support Journal

Tropical Rainforest (1993), accessed July 31, 2025

View Source
Preview of Private Native Forestry Code of Practice for Northern NSW - Environment and Heritage, accessed August 10, 2025,
Private Native Forestry Code of Practice for Northern NSW - Environment and Heritage, accessed August 10, 2025,
Direct Evidence

Private Native Forestry Code of Practice for Cypress and Western ...

View Source
Preview of Queensland tropical rain forests - Wikipedia, accessed July 30, 2025,
Queensland tropical rain forests - Wikipedia, accessed July 30, 2025,
Contextual Support

Queensland tropical rain forests - Wikipedia, accessed July 31, 2025

View Source
Preview of Reduced Impact Logging Minimally Alters Tropical Rainforest Carbon and Energy Exchange - Harvard School of Engineering and Applied Sciences, accessed July 31, 2025
Reduced Impact Logging Minimally Alters Tropical Rainforest Carbon and Energy Exchange - Harvard School of Engineering and Applied Sciences, accessed July 31, 2025
Contextual Support Journal

Forest canopy damage and recovery in reduced-impact and conventional selective logging in eastern Para, Brazil, accessed July 31, 2025

View Source
Preview of Reduced impact logging minimally alters tropical rainforest carbon and energy exchange, accessed July 31, 2025
Reduced impact logging minimally alters tropical rainforest carbon and energy exchange, accessed July 31, 2025
Contextual Support Journal

Reduced impact logging minimally alters tropical rainforest carbon and energy exchange, accessed July 31, 2025,

View Source
Preview of Report shows benefits of sustainable wood harvesting in native forests, accessed July 31, 2025
Report shows benefits of sustainable wood harvesting in native forests, accessed July 31, 2025
Contextual Support GreyLiterature

Australia's State of the Forests Report - DAFF

View Source
Preview of Resources - Department of Primary Industries, Queensland, accessed July 31, 2025
Resources - Department of Primary Industries, Queensland, accessed July 31, 2025
Contextual Support Journal

Resources - Department of Primary Industries, Queensland, accessed July 31, 2025,

View Source
Preview of Silvicultural guidelines: Private Native Forestry Code of Practice - Environment and Heritage, accessed July 31, 2025
Silvicultural guidelines: Private Native Forestry Code of Practice - Environment and Heritage, accessed July 31, 2025
Contextual Support

Government Gazette

View Source
Preview of SUBMISSION ON CYPRESS FOREST MANAGEMENT IN THE BRIGALOW AND NANDEWAR STATE CONSERVATION AREAS - Forestry Australia, accessed July 31, 2025
SUBMISSION ON CYPRESS FOREST MANAGEMENT IN THE BRIGALOW AND NANDEWAR STATE CONSERVATION AREAS - Forestry Australia, accessed July 31, 2025
Contextual Support Journal

Norfolk Island - FAO Knowledge Repository, accessed July 31, 2025

View Source
Preview of submission on draft report (released june 2014) on active and adaptive cypress management in the brigalow - Forestry Australia, accessed July 31, 2025
submission on draft report (released june 2014) on active and adaptive cypress management in the brigalow - Forestry Australia, accessed July 31, 2025
Contextual Support Journal

SUBMISSION ON CYPRESS FOREST MANAGEMENT IN THE BRIGALOW AND NANDEWAR STATE CONSERVATION AREAS - Forestry Australia, accessed July 31, 2025

View Source
Preview of The future role of the National Park Forestry Zone in a ... - DCCEEW, accessed July 30, 2025,
The future role of the National Park Forestry Zone in a ... - DCCEEW, accessed July 30, 2025,
Contextual Support Journal

Norfolk Island Native Plants

View Source
Preview of THINNING OF NATIVE FOREST - Forestry Australia, accessed July 12, 2025,
THINNING OF NATIVE FOREST - Forestry Australia, accessed July 12, 2025,
Contextual Support Direct Evidence Journal

THINNING OF NATIVE FOREST - Forestry Australia, accessed July 31, 2025

View Source
Preview of Tiwi Island collaboration to double forestry exports in seven years, accessed July 31, 2025
Tiwi Island collaboration to double forestry exports in seven years, accessed July 31, 2025
Contextual Support GreyLiterature

News Hub | Wood Central Updates, accessed July 31, 2025

View Source
Preview of Tiwi Plantation Corporation and Port Melville - Transparency Portal, accessed July 30, 2025,
Tiwi Plantation Corporation and Port Melville - Transparency Portal, accessed July 30, 2025,
Contextual Support Government

Forestry | Department of Agriculture and Fisheries

View Source
Preview of Tiwi Plantation Corporation and Port Melville - Transparency Portal, accessed July 31, 2025
Tiwi Plantation Corporation and Port Melville - Transparency Portal, accessed July 31, 2025
Contextual Support Government

Tiwi Plantation Corporation and Port Melville - Transparency Portal

View Source
Preview of Tropical Rainforest (1993), accessed July 30, 2025,
Tropical Rainforest (1993), accessed July 30, 2025,
Contextual Support Journal

Australia's State of the Forests Report Synthesis 2023, accessed July 31, 2025

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Maritime Islands
  • Land Use Production Forestry
  • Assessment Not Stated
  • Vegetation Forest
  • Evidence Type TargetCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 28 May 2026

Notes

No direct, field-measured benchmark exists for this specific biome and land use. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TMI-FOR-TCC family.

20 % Moderate
Production Forestry · Not Stated · Forest
LowerThreshold Active v1
80 % Moderate
Production Forestry · Not Stated · Forest
UpperThreshold Active v1