Microbial Respiration

AUS-TSR-LVG-SMR General Low confidence

Benchmark Value

No specific value — see range

Range: 30 to 50 mg C/kg soil/d

Optimal Range: 30 to 50

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.

Evidence & Context

Optimal Range (Best Available Condition) 30 - 50 Benchmark Target. Represents a high-functioning, resilient system under long-term regenerative management.

Metric Definition:

Basal microbial respiration rate representing soil biological activity and ecosystem function.

Benchmark Definition:

This benchmark defines the optimal microbial respiration range indicating a high-functioning, resilient pasture system under long-term regenerative management in tropical and subtropical rainforest regions.

Justification:

This range represents the target for a 'best available condition' under regenerative management. It reflects a significant, multi-fold improvement over the degraded state, a magnitude of change that is consistent with the doubling of SOC stocks observed under long-term best-practice grazing.

Sources (1)

Preview of Soil Respiration - Natural Resources Conservation Service, accessed July 30, 2025,

Soil Respiration - Natural Resources Conservation Service, accessed July 30, 2025, Journal

Temperate Grasslands - Greening Australia, accessed August 12, 2025,

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Supporting Sources (4)

Additional references from the underlying research that informed this benchmark.

Criteria and Indicators for Sustainable Forest Management in Victoria, accessed July 19, 2025

Contextual Support Journal

Soil health: the foundation of sustainable agriculture - 2001 ...

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Demonstrating productive, regenerative Burdekin grazing practices | Meat & Livestock Australia - MLA, accessed July 19, 2025,

Contextual Support GreyLiterature

Grazing intensity influence soil microbial communities and their ..., accessed July 19, 2025

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How to determine an OPTIMAL soil respiration (or microbial respiration)? - ResearchGate, accessed August 5, 2025,

Contextual Support GreyLiterature

How to determine an OPTIMAL soil respiration (or microbial ..., accessed July 19, 2025

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The influence of land use and management on the ... - EGUsphere

Direct Evidence Journal

The influence of land use and management on the ... - EGUsphere, accessed July 19, 2025

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Context

Region Australia
Biome Tropical & Subtropical Rainforests
Land Use Livestock Grazing & Pasture
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 6 Jun 2026

Notes

Reflects significant SOC accumulation, a large and active microbial community, and a balance between nutrient cycling and carbon preservation. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TSR-LVG-SMR family.