Basal Area

AUS-AKW-AGR-BAS General Moderate confidence

Benchmark Value

0.5 m²/ha
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 3 benchmarks together — the OptimalRange form drives the primary score, while 2 guard(s) constrain the result.

Evidence & Context

The following table provides the final derived benchmark and its associated functional range, presented in the specified format for inclusion in the scientific catalog.

Metric Definition:

Basal area of trees and shrubs in m²/ha representing woody structure in agroecosystems

Benchmark Definition:

A basal area below 0.5 m²/ha is critically low, reducing ecological benefits such as wind erosion mitigation and habitat provision in arid karstic agricultural woodlands.

Justification:

Scientific rationale based on ecological function thresholds for woody overstorey in cropping systems.

Sources (1)

Preview of AusPlots Forests - TERN Australia, accessed July 23, 2025
AusPlots Forests - TERN Australia, accessed July 23, 2025 Journal

TERN Ecosystem Surveillance & Environmental Monitoring Systems - TERN Australia

View Source

Supporting Sources (39)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Late-Holocene environmental change on the Nullarbor Plain, southwest Australia, based on speleothem pollen records - ResearchGate, accessed July 23, 2025
(PDF) Late-Holocene environmental change on the Nullarbor Plain, southwest Australia, based on speleothem pollen records - ResearchGate, accessed July 23, 2025
Contextual Support Government

Acacia papyrocarpa (Leguminosae) - Seeds of South Australia - Species Information - Department for Environment and Water, accessed July 23, 2025

View Source
Preview of (PDF) Scattered native trees and soil patterns in grazing land on the Northern Tablelands of New South Wales, Australia - ResearchGate, accessed July 23, 2025
(PDF) Scattered native trees and soil patterns in grazing land on the Northern Tablelands of New South Wales, Australia - ResearchGate, accessed July 23, 2025
Contextual Support Journal

Ratio of microbial biomass carbon to soil organic carbon as a sensitive indicator of changes in soil organic matter - ResearchGate, accessed July 27, 2025

View Source
Preview of Acacia forest - DAFF, accessed July 23, 2025
Acacia forest - DAFF, accessed July 23, 2025
Contextual Support Journal

Description of Ecological Communities: Arid Eucalypt Woodlands - NECs 1.14 to 1.23 - DCCEEW, accessed July 19, 2025

View Source
Preview of Acacia Forests and Woodlands - Australian Vegetation, accessed July 23, 2025
Acacia Forests and Woodlands - Australian Vegetation, accessed July 23, 2025
Contextual Support GreyLiterature

Land Clearing in Australia | Mulchtech - Mulchers | 0439 666 535 | Bushland Clearing | Vegetation Management in Australia | Site Preparation in Australia | Forestry Mulching in Australia | Stump Removal Services in Australia | Earthmoving in Australia | Excavation Services in Australia | Australian Habitat Restoration | Erosion Control in Australia | Environmental Clearing in Australia | Agricultural Land Clearing - TMC CANCELA® Australia, accessed July 23, 2025

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Preview of Across The Nullarbor…….Western Australia at last! - Bob's Big Idea - WordPress.com, accessed July 23, 2025
Across The Nullarbor…….Western Australia at last! - Bob's Big Idea - WordPress.com, accessed July 23, 2025
Contextual Support GreyLiterature

Across The Nullarbor…….Western Australia at last! - Bob's Big Idea - WordPress.com

View Source
Preview of ARID LANDS OF AUSTRALIA - Open Research Repository, accessed July 15, 2025,
ARID LANDS OF AUSTRALIA - Open Research Repository, accessed July 15, 2025,
Contextual Support Journal

BioMetric: Vegetation condition benchmarks, short-term review

View Source
Preview of ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data, accessed July 23, 2025
ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data, accessed July 23, 2025
Methodology Source GreyLiterature

ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data, accessed July 23, 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
Direct Evidence Journal

ASC - CHROMOSOLS - Soil Science Australia

View Source
Preview of Australia's Nullarbor Plain, the world's largest limestone plateau - YouTube, accessed July 23, 2025
Australia's Nullarbor Plain, the world's largest limestone plateau - YouTube, accessed July 23, 2025
Irrelevant

Australia's Nullarbor Plain, the world's largest limestone plateau - YouTube, accessed July 23, 2025

View Source
Preview of basal_area: Basal area of tree trunks in TERN AusPlots in ternaustralia/ausplotsR - rdrr.io, accessed July 23, 2025
basal_area: Basal area of tree trunks in TERN AusPlots in ternaustralia/ausplotsR - rdrr.io, accessed July 23, 2025
Methodology Source GreyLiterature

basal_area: Basal area of tree trunks in TERN AusPlots in ternaustralia/ausplotsR - rdrr.io

View Source
Preview of Can simple, on-ground vegetation and soil measures reliably indicate the health of rangelands? An application in Australia's semi-arid woodlands - CSIRO Publishing, accessed July 30, 2025
Can simple, on-ground vegetation and soil measures reliably indicate the health of rangelands? An application in Australia's semi-arid woodlands - CSIRO Publishing, accessed July 30, 2025
Contextual Support Journal

The Rangeland Journal - CSIRO PUBLISHING, accessed July 10, 2025

View Source
Preview of Coolibah – sentinels of the waterways (Eucalyptus coolabah) - Department for Environment and Water, accessed July 23, 2025
Coolibah – sentinels of the waterways (Eucalyptus coolabah) - Department for Environment and Water, accessed July 23, 2025
Contextual Support Journal

The-Potential-Use-for-Groundwater-Use-by-Vegetation-in-the-Aust.-Arid-Zone.pdf - Northern Territory Government, accessed July 23, 2025

View Source
Preview of Description of Ecological Communities: Arid Eucalypt Woodlands - NEC 1.8 to 1.13 - DCCEEW, accessed July 23, 2025
Description of Ecological Communities: Arid Eucalypt Woodlands - NEC 1.8 to 1.13 - DCCEEW, accessed July 23, 2025
Direct Evidence Journal

Description of Ecological Communities: Arid Eucalypt Woodlands - NEC 1.8 to 1.13 - DCCEEW

View Source
Preview of Dryland ecohydrology and climate change: critical issues and technical advances - HESS, accessed July 23, 2025
Dryland ecohydrology and climate change: critical issues and technical advances - HESS, accessed July 23, 2025
Direct Evidence Journal

Dryland ecohydrology and climate change: critical issues and technical advances - HESS, accessed July 23, 2025

View Source
Preview of Ecohydrology: Vegetation Function, Water and Resource Management - ResearchGate, accessed July 23, 2025
Ecohydrology: Vegetation Function, Water and Resource Management - ResearchGate, accessed July 23, 2025
Contextual Support GreyLiterature

Ecohydrology: Vegetation Function, Water and Resource Management - ResearchGate

View Source
Preview of Environment Monitoring Systems & Data for Ecosystem Studies ..., accessed July 30, 2025,
Environment Monitoring Systems & Data for Ecosystem Studies ..., accessed July 30, 2025,
Direct Evidence Government

(PDF) Evaluation of genetic markers for the metabarcoding of ...

View Source
Preview of Eucalyptus oleosa - Wikipedia, accessed July 23, 2025
Eucalyptus oleosa - Wikipedia, accessed July 23, 2025
Contextual Support GreyLiterature

Eucalyptus oleosa - Wikipedia, accessed July 23, 2025

View Source
Preview of Functionality of Zonal Agroforestry Systems on Agricultural Land of Dry Territories - MDPI, accessed July 23, 2025
Functionality of Zonal Agroforestry Systems on Agricultural Land of Dry Territories - MDPI, accessed July 23, 2025
Contextual Support Journal

Functionality of Zonal Agroforestry Systems on Agricultural Land of Dry Territories - MDPI, accessed July 23, 2025

View Source
Preview of Impact of tree clearing on soil pH and nutrient availability in grazing systems of central Queensland, Australia - ResearchGate, accessed July 23, 2025
Impact of tree clearing on soil pH and nutrient availability in grazing systems of central Queensland, Australia - ResearchGate, accessed July 23, 2025
Contextual Support GreyLiterature

Ecological, Economic and Social Effects of Eucalyptus - Food and Agriculture Organization of the United Nations, accessed May 15, 2025

View Source
Preview of Nullarbor - Department for Environment and Water, accessed July 27, 2025
Nullarbor - Department for Environment and Water, accessed July 27, 2025
Contextual Support Journal

Conservation areas - Department for Energy and Mining, accessed July 26, 2025,

View Source
Preview of Nullarbor bioregion - DCCEEW, accessed July 27, 2025
Nullarbor bioregion - DCCEEW, accessed July 27, 2025
Contextual Support Journal

Nullarbor bioregion - DCCEEW, accessed July 24, 2025

View Source
Preview of Nullarbor Crossing - Food and Travel, accessed July 23, 2025
Nullarbor Crossing - Food and Travel, accessed July 23, 2025
Irrelevant

Nullarbor Crossing - Food and Travel, accessed July 23, 2025

View Source
Preview of Nullarbor National Park | national park, South Australia, Australia - Britannica, accessed July 23, 2025
Nullarbor National Park | national park, South Australia, Australia - Britannica, accessed July 23, 2025
Contextual Support GreyLiterature

Nullarbor National Park | national park, South Australia, Australia - Britannica, accessed July 23, 2025

View Source
Preview of Nullarbor Plain - Wikipedia, accessed July 25, 2025,
Nullarbor Plain - Wikipedia, accessed July 25, 2025,
Contextual Support GreyLiterature

Nullarbor Plain - Wikipedia, accessed July 24, 2025

View Source
Preview of Nullarbor Plain… - Landscape South Australia - Alinytjara Wilurara, accessed July 23, 2025
Nullarbor Plain… - Landscape South Australia - Alinytjara Wilurara, accessed July 23, 2025
Contextual Support Government

Nullarbor Plain… - Landscape South Australia - Alinytjara Wilurara, accessed July 23, 2025

View Source
Preview of NVIS Fact sheet MVG 22 – Chenopod shrublands, samphire shrublands and forblands - DCCEEW, accessed July 24, 2025
NVIS Fact sheet MVG 22 – Chenopod shrublands, samphire shrublands and forblands - DCCEEW, accessed July 24, 2025
Contextual Support Journal

A Case for Below-Ground Dispersal? Insights into the Biology, Ecology and Conservation of Blind Cave Spiders in the Genus Troglodiplura (Mygalomorphae: Anamidae) - PubMed Central, accessed July 23, 2025

View Source
Preview of Plots & Transects - TERN Australia, accessed July 15, 2025
Plots & Transects - TERN Australia, accessed July 15, 2025
Direct Evidence Government

How to use TERN's Ecosystem Surveillance Monitoring Data - atlassian

View Source
Preview of Scattered trees are keystone structures – Implications for conservation, accessed July 23, 2025
Scattered trees are keystone structures – Implications for conservation, accessed July 23, 2025
Contextual Support Government

Taxon Profile of Eucalyptus oleosa Miq. - Florabase, accessed July 23, 2025

View Source
Preview of Soil Research - CSIRO PUBLISHING, accessed May 13, 2025,
Soil Research - CSIRO PUBLISHING, accessed May 13, 2025,
Contextual Support Journal

Impact of tree clearing on soil pH and nutrient availability in grazing systems of central Queensland, Australia - CSIRO Publishing, accessed July 23, 2025

View Source
Preview of Taxon Profile of Acacia papyrocarpa Benth. | Florabase, accessed July 23, 2025
Taxon Profile of Acacia papyrocarpa Benth. | Florabase, accessed July 23, 2025
Contextual Support Government

Taxon Profile of Acacia papyrocarpa Benth. | Florabase, accessed July 23, 2025

View Source
Preview of ternaustralia/ausplotsR: R package to interact with TERN AusPlots data - GitHub, accessed July 15, 2025
ternaustralia/ausplotsR: R package to interact with TERN AusPlots data - GitHub, accessed July 15, 2025
Direct Evidence

ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data

View Source
Preview of Water balance of tropical eucalypt plantations in south-eastern China, accessed July 23, 2025
Water balance of tropical eucalypt plantations in south-eastern China, accessed July 23, 2025
Contextual Support Journal

Water balance of tropical eucalypt plantations in south-eastern China, accessed July 23, 2025

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Preview of Water sources accessed by arid zone riparian trees in highly saline environments, Australia, accessed July 23, 2025
Water sources accessed by arid zone riparian trees in highly saline environments, Australia, accessed July 23, 2025
Contextual Support Journal

The Myth That Eucalyptus Trees Deplete Soil Water—A Review - MDPI, accessed July 23, 2025

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Preview of What are some possible explanations for the lack of vegetation on the Nullarbor Plain of Western Australia? - Quora, accessed July 27, 2025
What are some possible explanations for the lack of vegetation on the Nullarbor Plain of Western Australia? - Quora, accessed July 27, 2025
Direct Evidence GreyLiterature

What are some possible explanations for the lack of vegetation on the Nullarbor Plain of Western Australia? - Quora

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Preview of Wind erosion | Department of Primary Industries and Regional Development, accessed July 12, 2025,
Wind erosion | Department of Primary Industries and Regional Development, accessed July 12, 2025,
Contextual Support Government

Management - Mallee Sustainable Farming, accessed July 23, 2025

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Preview of Wind erosion | Department of Primary Industries and Regional Development, accessed July 23, 2025
Wind erosion | Department of Primary Industries and Regional Development, accessed July 23, 2025
Contextual Support Government

Ground cover monitoring for Australia - DAFF

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Preview of Wind erosion | Land and soil - Environment and Heritage, accessed July 12, 2025,
Wind erosion | Land and soil - Environment and Heritage, accessed July 12, 2025,
Contextual Support

Wind erosion | Land and soil - Environment and Heritage

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Preview of Works cited
Nullarbor plain | Article for mature travellers - Odyssey Traveller, accessed July 23, 2025
Works cited Nullarbor plain | Article for mature travellers - Odyssey Traveller, accessed July 23, 2025
Irrelevant

Karst features and remnant dune systems on the Nullarbor Plain, Australia, accessed July 24, 2025

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Preview of Your Complete Nullarbor Guide - Part 1. Ceduna to Nullarbor Roadhouse, accessed July 23, 2025
Your Complete Nullarbor Guide - Part 1. Ceduna to Nullarbor Roadhouse, accessed July 23, 2025
Contextual Support GreyLiterature

Karst and agriculture in Australia" by David Gillieson and Mia Thurgate - Digital Commons @ USF - University of South Florida

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Context

  • Region Australia
  • Biome Arid Karstic Woodlands & Shrublands
  • Land Use Agricultural Crop Production
  • Assessment Agricultural Biodiversity Target
  • Vegetation Woodland
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 4 Jun 2026