eDNA Biodiversity Detection

AUS-AIF-CON-DNA General Moderate confidence

Benchmark Value

20 count

Range: 20 to 20 count

Optimal Range: 20 to 20

Direction: Higher is desirable ↑

Form: Point

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context.

Evidence & Context

A detected richness of ~20 vertebrate taxa.

Metric Definition:

Number of vertebrate taxa detected via eDNA metabarcoding from natural, ephemeral water bodies in a semi-arid conservation landscape.

Benchmark Definition:

Detected vertebrate richness via eDNA metabarcoding as an indicator of biodiversity in arid inland floodplain conservation areas.

Justification:

The benchmark is based on peer-reviewed research in natural gnammas within a semi-arid landscape, representing the best available proxy for high-health arid ephemeral systems. The Moderate confidence reflects proxy nature and methodological variability.

Sources (3)

Preview of Detection of vertebrates from natural and artificial inland water ...

Detection of vertebrates from natural and artificial inland water ... Journal

eDNA as a tool for identifying freshwater species in sustainable ..., accessed July 24, 2025

View Source

Preview of EnviroDNA: eDNA Biodiversity Monitoring Solutions, accessed August 12, 2025

EnviroDNA: eDNA Biodiversity Monitoring Solutions, accessed August 12, 2025 GreyLiterature

Guidance on the use of ecosystem receptor indicators for the assessment of water and sediment quality, accessed July 24, 2025

View Source

Preview of What lies beneath the water? | Murray–Darling Basin Authority, accessed July 22, 2025,

What lies beneath the water? | Murray–Darling Basin Authority, accessed July 22, 2025, Journal

ECOLOGICALLY FUNCTIONAL FLOODPLAINS: CONNECTIVITY, FLOW REGIME, AND SCALE1 - NOAA, accessed July 20, 2025,

View Source

Supporting Sources (14)

Additional references from the underlying research that informed this benchmark.

Preview of Condition thresholds in Australia's threatened ecological community listings hinder conservation of dynamic ecosystems - CSIRO Publishing, accessed August 4, 2025

Condition thresholds in Australia's threatened ecological community listings hinder conservation of dynamic ecosystems - CSIRO Publishing, accessed August 4, 2025

Direct Evidence Journal

Condition thresholds in Australia´s threatened ... - CSIRO Publishing

View Source

Ecological condition of central Australian arid-zone rivers - PubMed, accessed July 21, 2025

Contextual Support Journal

Ecological condition of central Australian arid-zone rivers - PubMed

View Source

Preview of eDNA biomonitoring – Towards a new generation of ecological assessment tools for managing coastal environments - CSIRO Research, accessed August 10, 2025

eDNA biomonitoring – Towards a new generation of ecological assessment tools for managing coastal environments - CSIRO Research, accessed August 10, 2025

Contextual Support Government

eDNA methods for tropical waters - Northern Australia - Resilient Landscapes Hub

View Source

eDNA explained: unlocking nature's hidden biodiversity - CSIRO, accessed August 12, 2025

Contextual Support Government

eDNA explained: unlocking nature's hidden biodiversity - CSIRO

View Source

Preview of eDNA: Review of applicability for monitoring and detecting biotic populations of the Murray-Darling Basin - Centre for Invasive Species Solutions, accessed July 22, 2025,

eDNA: Review of applicability for monitoring and detecting biotic populations of the Murray-Darling Basin - Centre for Invasive Species Solutions, accessed July 22, 2025,

Contextual Support Government

Marine environmental DNA biomonitoring reveals seasonal patterns in biodiversity and identifies ecosystem responses to anomalous climatic events, accessed August 4, 2025,

View Source

Preview of Environmental DNA reveals temporal and spatial variability of invertebrate communities in arid-lands ephemeral water bodies - bioRxiv

Environmental DNA reveals temporal and spatial variability of invertebrate communities in arid-lands ephemeral water bodies - bioRxiv

Contextual Support

2023 Spring Season Results - Great Australian Wildlife Search, accessed July 20, 2025,

View Source

Preview of Environmental DNA reveals temporal and spatial variability of invertebrate communities in arid-lands ephemeral water bodies - Figshare

Environmental DNA reveals temporal and spatial variability of invertebrate communities in arid-lands ephemeral water bodies - Figshare

Contextual Support GreyLiterature

Use of eDNA and conventional sampling methods to survey rock pool (gnamma) biodiversity on granite inselbergs, accessed July 20, 2025,

View Source

Evaluating eDNA and metabarcoding as biodiversity monitoring tools, accessed July 22, 2025,

Methodology Source GreyLiterature

Biodiversity & Conservation - EcoDNA, accessed July 24, 2025

View Source

Hydrology as a Determinant of Riparian Habitat Structure in Lowland River Floodplains, accessed July 22, 2025,

Contextual Support

Hydrology as a Determinant of Riparian Habitat Structure in Lowland River Floodplains

View Source

Preview of Investigating semi-arid vertebrate communities from different quality habitats using eDNA derived from soils - GUPEA, accessed July 22, 2025,

Investigating semi-arid vertebrate communities from different quality habitats using eDNA derived from soils - GUPEA, accessed July 22, 2025,

Contextual Support GreyLiterature

Investigating semi-arid vertebrate communities from different quality habitats using eDNA derived from soils - GUPEA

View Source

Joint media release: eDNA results reveal rich biodiversity in the Murray–Darling Basin

Contextual Support Government

Environmental DNA testing of regional waterways - Landscape SA

View Source

Large, connected floodplain forests prone to flooding best sustain plant diversity - PubMed, accessed July 22, 2025,

Contextual Support Journal

Large, connected floodplain forests prone to flooding best sustain plant diversity - PubMed

View Source

Review of: Riverine Flood Plains: Present State and Future Trends - ScholarWorks at University of Montana, accessed July 22, 2025,

Contextual Support

Review of: Riverine Flood Plains: Present State and Future Trends - ScholarWorks at University of Montana

View Source

Preview of The Great Australian Wildlife Search announces public release of eDNA data across Australia's largest river system - EnviroDNA, accessed August 12, 2025

The Great Australian Wildlife Search announces public release of eDNA data across Australia's largest river system - EnviroDNA, accessed August 12, 2025

Contextual Support GreyLiterature

Joint media release: eDNA results reveal rich biodiversity in the Murray–Darling Basin, accessed July 24, 2025

View Source

Context

Region Australia
Biome Arid Inland Floodplains & Ephemeral River Systems
Land Use Conservation / Protected Natural Areas
Assessment Pristine Reference
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 23 Mar 2026

Notes

No upper detrimental threshold — higher values are always better up to natural saturation. The benchmark is a reference point, not a rigid threshold. The lower critical threshold is defined by compositional collapse, absence of key species, and loss of functional groups. High richness inflated by invasive species indicates degradation.