eDNA Biodiversity Detection

AUS-AKW-AGR-DNA General Low confidence

Benchmark Value

No specific value — see range
Direction: Higher is desirable ↑
Form: CompositeFramework

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is CompositeFramework, but the benchmark data may be missing required fields (e.g., optimal range bounds for an OptimalRange benchmark). This is typically a data quality issue in the benchmark pipeline.

Contributing Benchmarks

CompositeFramework Primary MinimumOnly Guard OptimalRange Guard CompositeFramework Guard

Evidence & Context

The benchmark value derived from this study is the detection of 22 orders and 45 families of invertebrates from water samples collected in ephemeral granite rock-holes.

Metric Definition:

Detection of invertebrate biodiversity using eDNA metabarcoding, measured as taxonomic richness at the order and family levels.

Benchmark Definition:

This benchmark represents a proxy measure of invertebrate biodiversity detection using eDNA in arid Australian environments, based on observations from ephemeral granite rock-holes in a non-agricultural arid ecosystem.

Justification:

Derived from a 2024 eDNA metabarcoding survey of invertebrate communities in ephemeral granite rock-holes within the Gawler bioregion, a non-agricultural Australian arid landscape, due to absence of direct benchmarks for agricultural cropping in this biome.

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

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Australia's strategy for nature 2024-2030 - DCCEEW
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Does the landscape functionality approach provide insight into rangeland conditions in the Tanqua Karoo region, South Africa?
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Environmental DNA reveals temporal and spatial variability of invertebrate communities in arid-lands ephemeral water bodies - Figshare
Contextual Support GreyLiterature

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Context

  • Region Australia
  • Biome Arid Karstic Woodlands & Shrublands
  • Land Use Agricultural Crop Production
  • Assessment Not Stated
  • Evidence Type ReferenceCondition

Lifecycle

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

Notes

No direct benchmark exists for agricultural cropping in this biome due to ecological incompatibility. This proxy benchmark indicates the magnitude of invertebrate biodiversity achievable in a healthy arid system, not a prescriptive target. No evidence for an upper detrimental threshold; community composition and invasive species presence are critical. The lower threshold relates conceptually to Landscape Functional Integrity collapse, not a numeric value. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.