Microbial Respiration

AUS-TSW-FOR-SMR General Moderate confidence

Benchmark Value

20.1 mg/kg/day

Direction: Higher is desirable ↑

Form: Point

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is Point, 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

Point Primary MinimumOnly Guard LowerThreshold Guard

Evidence & Context

The final derived benchmark value, rounded to one decimal place, is 20.1 mg CO2-C/kg/day.

Metric Definition:

Basal microbial respiration rate measured under standardized laboratory moisture conditions.

Benchmark Definition:

This benchmark represents the basal microbial respiration rate in soil under mature trees in a semi-arid Mallee woodland, indicating soil microbial activity and health under controlled moisture conditions.

Justification:

Derived from a study measuring basal respiration under controlled moisture conditions in a semi-arid Mallee woodland, representing a high-health state.

Sources (1)

Preview of Response of respiration and nutrient availability to drying and rewetting in soil from a semi-arid woodland depends on vegetation patch and a recent wildfire - BG

Response of respiration and nutrient availability to drying and rewetting in soil from a semi-arid woodland depends on vegetation patch and a recent wildfire - BG Journal

Response of soil respiration to drying and rewetting - BG

Supporting Sources (17)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Drivers of soil organic carbon storage and vertical distribution in Eastern Australia, accessed July 22, 2025,

(PDF) Drivers of soil organic carbon storage and vertical distribution in Eastern Australia, accessed July 22, 2025,

Contextual Support Government

Soil respiration–driven CO2 pulses dominate Australia's flux variability

Preview of A Benchmarking Approach to Assess Soil Health - SHI

A Benchmarking Approach to Assess Soil Health - SHI

Contextual Support Journal

A Benchmarking Approach to Assess Soil Health - SHI

Preview of A Benchmarking Approach to Assess Soil Health - SHI, accessed August 28, 2025,

A Benchmarking Approach to Assess Soil Health - SHI, accessed August 28, 2025,

Contextual Support GreyLiterature

Soil | Australia state of the environment 2021, accessed July 16, 2025,

Preview of ABARES report reaffirms sustainability, sovereign capability and climate credentials of Australian native forestry

ABARES report reaffirms sustainability, sovereign capability and climate credentials of Australian native forestry

Contextual Support Journal

ABARES report reaffirms sustainability, sovereign capability and climate credentials of Australian native forestry

Preview of Article: The Breath of Life in Your Fields - Microbiology Laboratories Australia

Article: The Breath of Life in Your Fields - Microbiology Laboratories Australia

Contextual Support Journal

Article: The Breath of Life in Your Fields - Microbiology Laboratories Australia

Preview of Australia's forests – overview - DAFF, accessed August 5, 2025,

Australia's forests – overview - DAFF, accessed August 5, 2025,

Contextual Support Government

Eastern Australian Temperate Forests | One Earth, accessed April 29, 2025,

Preview of Australia's forests – overview - DAFF, accessed on May 25, 2025,

Australia's forests – overview - DAFF, accessed on May 25, 2025,

Contextual Support Government

Resistance and resilience of the forest soil microbiome to logging-associated compaction

Preview of Inherent Factors Affecting Soil Respiration - USDA, accessed July 30, 2025,

Inherent Factors Affecting Soil Respiration - USDA, accessed July 30, 2025,

Contextual Support Journal

Inherent Factors Affecting Soil Respiration - USDA

Preview of Plant genus (Acacia and Eucalyptus) alters soil microbial community structure and relative abundance within revegetated shelterbelts | Request PDF - ResearchGate

Plant genus (Acacia and Eucalyptus) alters soil microbial community structure and relative abundance within revegetated shelterbelts | Request PDF - ResearchGate

Direct Evidence Journal

Plant genus (Acacia and Eucalyptus) alters soil microbial community structure and relative abundance within revegetated shelterbelts | Request PDF - ResearchGate

Preview of Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed July 30, 2025,

Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed July 30, 2025,

Contextual Support Journal

Use Our: Soil Penetrometer - onondaga county soil & water conservation district, accessed August 2, 2025

Preview of Soil Health Testing - Agronomic Insights, accessed July 6, 2025,

Soil Health Testing - Agronomic Insights, accessed July 6, 2025,

Contextual Support GreyLiterature

Australia's forests – overview - DAFF

Preview of Soil microbial diversity–biomass relationships are driven by soil carbon content across global biomes - PMC - PubMed Central, accessed August 3, 2025

Soil microbial diversity–biomass relationships are driven by soil carbon content across global biomes - PMC - PubMed Central, accessed August 3, 2025

Contextual Support GreyLiterature

(PDF) Response of respiration and nutrient availability to drying and ...

Preview of Soil microbial respiration adapts to ambient temperature in global drylands - PMC, accessed August 5, 2025,

Soil microbial respiration adapts to ambient temperature in global drylands - PMC, accessed August 5, 2025,

Contextual Support

Soil – the driver of carbon dioxide variability over Australia

Preview of Soil Research - CSIRO PUBLISHING, accessed August 5, 2025,

Soil Research - CSIRO PUBLISHING, accessed August 5, 2025,

Contextual Support Journal

Soil Research - CSIRO PUBLISHING

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

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

Contextual Support Journal

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

Preview of Spatial distribution of soil microbial activity and soil properties associated with Eucalyptus and Acacia plantings in NSW, Australia | Request PDF - ResearchGate

Spatial distribution of soil microbial activity and soil properties associated with Eucalyptus and Acacia plantings in NSW, Australia | Request PDF - ResearchGate

Contextual Support Journal

Spatial distribution of soil microbial activity and soil properties associated with Eucalyptus and Acacia plantings in NSW, Australia | Request PDF - ResearchGate

Preview of Woodlands - DCCEEW, accessed August 5, 2025,

Woodlands - DCCEEW, accessed August 5, 2025,

Contextual Support Government

Woodlands - DCCEEW, accessed August 4, 2025,

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Production Forestry
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 6 Jun 2026

Notes

Lower Critical Threshold: 12 mg/kg/day. No upper detrimental threshold — higher values are always better up to natural saturation. High rates may indicate system instability rather than superior health. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.