Microbial Respiration

AUS-AIF-LVG-SMR General Moderate confidence

Benchmark Value

No specific value — see range
Range: 4 to 10 mg/kg/day
Optimal Range: 4 to 10
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. The scoring engine uses 5 benchmarks together — the OptimalRange form drives the primary score, while 4 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary LowerThreshold Guard UpperThreshold Guard OptimalRange Guard Point Guard

Evidence & Context

Based on this, an optimal range for a best-practice managed grazing system in this biome can be proposed as approximately 4 to 10 mg CO₂-C/kg/day.

Metric Definition:

Basal microbial respiration rate measured as mg CO2-C per kg of soil per day under standardized laboratory conditions.

Benchmark Definition:

Optimal functional range of basal microbial respiration indicating healthy and resilient soil function in arid inland floodplains and ephemeral river systems under livestock grazing and pasture.

Justification:

This range is inferred from the established lower and upper thresholds and represents a balance between microbial activity and carbon protection.

Sources (1)

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

Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services, accessed July 19, 2025,

View Source

Supporting Sources (3)

Additional references from the underlying research that informed this benchmark.

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

Twenty years of progress, challenges, and opportunities in measuring and understanding soil respiration, accessed August 13, 2025,

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

Aridity thresholds of soil microbial metabolic indices along a 3,200 ..., accessed July 19, 2025,

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

Soil Respiration in Different Agricultural and Natural Ecosystems in an Arid Region - PLOS

View Source

Context

  • Region Australia
  • Biome Arid Inland Floodplains & Ephemeral River Systems
  • Land Use Livestock Grazing & Pasture
  • Assessment Pristine Reference
  • Evidence Type HealthyOperationalRange

Lifecycle

  • Status Active
  • Version 1
  • Effective From 18 Mar 2026

Notes

Values within this range indicate efficient nutrient cycling and soil carbon stabilization under regenerative grazing.

Related Benchmarks

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

2 mg/kg/day Moderate
Livestock Grazing & Pasture · Pristine Reference
LowerThreshold Active v1
15 mg/kg/day Moderate
Livestock Grazing & Pasture · Pristine Reference
UpperThreshold Active v1