Microbial Respiration

AUS-TSW-LVG-SMR General Moderate confidence

Benchmark Value

61 mg C/kg soil/d

Direction: Higher is desirable ↑

Form: Point

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 15 benchmarks together — the OptimalRange form drives the primary score, while 14 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

This value represents the average daily basal respiration rate measured under standardized laboratory conditions (42-day incubation at 28°C) from pastureland soil in a semi-arid environment.

Metric Definition:

Average daily basal microbial respiration rate measured under standardized laboratory conditions (42-day incubation at 28°C) from pastureland soil in a semi-arid environment.

Benchmark Definition:

This benchmark represents the average daily basal microbial respiration rate under controlled laboratory conditions in semi-arid pastureland soils, indicating soil biological capacity and health under sustainable grazing management.

Justification:

Selected as the best-on-offer proxy for a high-functioning system under sustainable grazing, based on robust peer-reviewed analogue studies from ecologically similar semi-arid environments.

Sources (1)

Soil Microbial Respiration as an Indicator of Land Degradation in Different Land Uses of a Semi-Arid Region of Western Iran

View Source

Supporting Sources (3)

Additional references from the underlying research that informed this benchmark.

Preview of 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 - CSIRO Research Publications Repository, accessed July 18, 2025,

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 - CSIRO Research Publications Repository, accessed July 18, 2025,

Contextual Support Journal

Case Study - Regenerative Rangelands - Landcare Australia, accessed July 23, 2025

View Source

Microsite and grazing intensity drive infiltration in a semi-arid woodland - ResearchGate, accessed August 11, 2025

Contextual Support

Grazing dampens the positive effects of shrub ... - Arid Ecology Lab, accessed July 11, 2025,

View Source

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

Contextual Support Journal

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

View Source

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Livestock Grazing & Pasture
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 5 Jun 2026

Notes

Lower Critical Threshold: 15 mg C/kg soil/d. No upper detrimental threshold — high respiration can be detrimental if it reflects net carbon loss, but natural transient pulses are normal. Derived from analogue semi-arid pastureland soils in Iran due to lack of direct Australian data. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.