Microbial Respiration

AUS-TDG-LVG-SMR General Moderate confidence

Benchmark Value

30 mg/kg/day

Direction: Higher is desirable ↑

Form: MinimumOnly

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

A microbial respiration rate falling consistently below 30 mg CO2-C/kg/day for this soil type can be considered a critical threshold, indicating that the soil's biological engine is functionally impaired.

Metric Definition:

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

Benchmark Definition:

This benchmark defines the lower critical threshold of basal microbial respiration below which soil function is impaired in temperate dry woodlands and native grasslands under livestock grazing.

Justification:

This threshold is based on labile carbon values approximately 10–15% lower than the best-practice system, converted using the same 0.2% turnover rate.

Sources (1)

Preview of Grazing management for soil carbon in Australia: A review, accessed August 5, 2025,

Grazing management for soil carbon in Australia: A review, accessed August 5, 2025, Journal

Grazing management for soil carbon in Australia: A review

Supporting Sources (18)

Additional references from the underlying research that informed this benchmark.

Preview of Climate change impacts and adaptation on Australian farms - DAFF, accessed August 9, 2025

Climate change impacts and adaptation on Australian farms - DAFF, accessed August 9, 2025

Contextual Support Journal

Tool 6.7 Soil health benchmarks and guidelines for managing problem soils

Preview of Comparison of grazed and cleared temperate grassy woodlands in eastern Australia: patterns in space and inferences in time - ResearchGate, accessed July 10, 2025,

Comparison of grazed and cleared temperate grassy woodlands in eastern Australia: patterns in space and inferences in time - ResearchGate, accessed July 10, 2025,

Contextual Support Journal

Comparison of grazed and cleared temperate grassy woodlands in eastern Australia: patterns in space and inferences in time - ResearchGate

Preview of Composition and production from native pastures in response to fertiliser and rotational grazing | EverGraze More livestock from perennials

Composition and production from native pastures in response to fertiliser and rotational grazing | EverGraze More livestock from perennials

Contextual Support GreyLiterature

Composition and production from native pastures in response to fertiliser and rotational grazing | EverGraze More livestock from perennials

Preview of Crop and Pasture Science - CSIRO PUBLISHING

Crop and Pasture Science - CSIRO PUBLISHING

Direct Evidence Journal

Temperature response of soil respiration largely unaltered with experimental warming

Preview of Evaluation of microorganisms response to soil physical conditions under different agriculture use systems - SciELO Colombia

Evaluation of microorganisms response to soil physical conditions under different agriculture use systems - SciELO Colombia

Contextual Support

Evaluation of microorganisms response to soil physical conditions under different agriculture use systems - SciELO Colombia

Preview of Grazing intensity influence soil microbial communities and their implications for soil respiration | Request PDF - ResearchGate

Grazing intensity influence soil microbial communities and their implications for soil respiration | Request PDF - ResearchGate

Contextual Support GreyLiterature

Grazing intensity influence soil microbial communities and their implications for soil respiration | Request PDF - ResearchGate

Preview of Grazing intensity influence soil microbial communities and their implications for soil respiration | Request PDF - ResearchGate, accessed July 19, 2025,

Grazing intensity influence soil microbial communities and their implications for soil respiration | Request PDF - ResearchGate, accessed July 19, 2025,

Contextual Support GreyLiterature

Grazing intensity influence soil microbial communities and their implications for soil respiration | Request PDF - ResearchGate

Preview of Grazing management for soil carbon in Australia: A review - ResearchGate, accessed August 5, 2025,

Grazing management for soil carbon in Australia: A review - ResearchGate, accessed August 5, 2025,

Direct Evidence Journal

Grazing management for soil carbon in Australia: A review - ResearchGate, accessed May 10, 2026

Preview of Grazing Regulates Changes in Soil Microbial Communities in Plant-Soil Systems - MDPI

Grazing Regulates Changes in Soil Microbial Communities in Plant-Soil Systems - MDPI

Contextual Support Journal

Drought decreases incorporation of recent plant photosynthate into soil food webs regardless of their trophic complexity - PMC, accessed May 10, 2026

Preview of Impacts of Rotational Grazing on Soil Carbon in Native Grass-Based ..., accessed August 5, 2025,

Impacts of Rotational Grazing on Soil Carbon in Native Grass-Based ..., accessed August 5, 2025,

Contextual Support Journal

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

Preview of Impacts of Rotational Grazing on Soil Carbon in Native Grass-Based Pastures in Southern Australia - ResearchGate, accessed August 5, 2025,

Impacts of Rotational Grazing on Soil Carbon in Native Grass-Based Pastures in Southern Australia - ResearchGate, accessed August 5, 2025,

Contextual Support GreyLiterature

Grazing management for soil carbon in Australia: A review - ResearchGate

Preview of Inherent Factors Affecting Soil Respiration - Solvita, accessed August 5, 2025,

Inherent Factors Affecting Soil Respiration - Solvita, accessed August 5, 2025,

Contextual Support Journal

Inherent Factors Affecting Soil Respiration - Solvita

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 Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services - Frontiers, accessed July 30, 2025,

Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services - Frontiers, accessed July 30, 2025,

Contextual Support Journal

Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - CSIRO Publishing, accessed July 10, 2025,

Preview of Removing Grazing Pressure from a Native Pasture Decreases Soil Organic Carbon in Southern New South Wales, Australia - ResearchGate

Removing Grazing Pressure from a Native Pasture Decreases Soil Organic Carbon in Southern New South Wales, Australia - ResearchGate

Contextual Support

Removing Grazing Pressure from a Native Pasture Decreases Soil Organic Carbon in Southern New South Wales, Australia - ResearchGate

Preview of Soil Biology in Pasture Systems - Making More From Sheep

Soil Biology in Pasture Systems - Making More From Sheep

Contextual Support Journal

Soil Biology in Pasture Systems - Making More From Sheep

Preview of Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China - Frontiers

Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China - Frontiers

Contextual Support Journal

Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China - Frontiers

Preview of Temperature sensitivity of soil respiration rates enhanced by microbial community response - PubMed, accessed July 30, 2025,

Temperature sensitivity of soil respiration rates enhanced by microbial community response - PubMed, accessed July 30, 2025,

Contextual Support Journal

Soil Respiration in Semiarid Temperate Grasslands under Various Land Management - PMC - PubMed Central

Context

Region Australia
Biome Temperate Dry Woodlands & Native Grasslands
Land Use Livestock Grazing & Pasture
Assessment Conservation Target
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

Indicates significant functional impairment characteristic of degraded, heavily grazed systems with depleted labile carbon pools.

Related Benchmarks

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