Microbial Respiration

AUS-AIF-LVG-SMR General Moderate confidence

Benchmark Value

15 mg/kg/day
Direction: Higher is desirable ↑
Form: MaximumOnly

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 7 benchmarks together — the OptimalRange form drives the primary score, while 6 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary Point Guard MinimumOnly Guard MaximumOnly Guard Point Guard MinimumOnly Guard OptimalRange Guard

Evidence & Context

Functional Range Interpretation: The benchmark must be interpreted within a functional range: (3) Upper Detrimental Threshold (>15 mg CO₂-C/kg/day): Suggests an unstable system "hemorrhaging" carbon.

Metric Definition:

Upper detrimental threshold of basal microbial respiration indicating system instability and carbon loss.

Benchmark Definition:

Upper detrimental threshold of basal microbial respiration indicating system instability and carbon loss in Australian arid inland floodplains under livestock grazing and pasture.

Justification:

This threshold indicates a system with excessive decomposition of unprotected soil organic matter, often following major physical disturbance.

Sources (1)

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

Inherent Factors Affecting Soil Respiration - USDA

View Source

Supporting Sources (4)

Additional references from the underlying research that informed this benchmark.

Preview of Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services
Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services
Contextual Support GreyLiterature

Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services

View Source
Preview of Soil Respiration | South Dakota Soil Health Coalition, accessed July 30, 2025,
Soil Respiration | South Dakota Soil Health Coalition, accessed July 30, 2025,
Direct Evidence GreyLiterature

Original Research Article QUANTIFICATION OF MICROBIAL BIOMASSCARBON AND NITROGENIN LEAF LITTER AMENDED SOIL IN NORTHERN NIGERIA - AWS

View Source
Preview of Soil Respiration in Relation to Ecosystem Types in an Arid Area
Soil Respiration in Relation to Ecosystem Types in an Arid Area
Contextual Support Journal

Soil Respiration in Relation to Ecosystem Types in an Arid Area

View Source
Preview of Soil Respiration in Relation to Ecosystem Types in an Arid Area, accessed July 19, 2025,
Soil Respiration in Relation to Ecosystem Types in an Arid Area, accessed July 19, 2025,
Contextual Support Journal

Top 6 Sustainable Forest Management Techniques, accessed July 31, 2025

View Source

Context

  • Region Australia
  • Biome Arid Inland Floodplains & Ephemeral River Systems
  • Land Use Livestock Grazing & Pasture
  • Assessment Conservation Target
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 3 Jun 2026

Notes

Indicates an unstable system 'hemorrhaging' carbon, not a sign of health.

Related Benchmarks

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

6.4 mg/kg/day Moderate
Livestock Grazing & Pasture · Conservation Target
Point Active v1
2 mg/kg/day Moderate
Livestock Grazing & Pasture · Conservation Target
MinimumOnly Active v1
— mg/kg/day Moderate
Livestock Grazing & Pasture · Conservation Target
OptimalRange Active v1