Microbial Respiration

AUS-TSR-CON-SMR General Moderate confidence

Benchmark Value

45 mg/kg/day
Direction: Higher is desirable ↑
Form: MinimumOnly

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.

Evidence & Context

Lower Critical Threshold: A ~50% reduction from this benchmark (i.e., <45 mg CO₂-C/kg/day) indicates significant functional impairment, consistent with degradation from a conservation to a production agriculture state.

Metric Definition:

Microbial respiration rate indicating functional impairment when below threshold.

Benchmark Definition:

Threshold below which microbial respiration indicates significant ecosystem functional impairment in tropical rainforest under conservation management.

Justification:

Based on evidence of a halving of microbial biomass and respiration rates in agricultural conversion and disturbance studies in the Australian Wet Tropics.

Sources (1)

Preview of Soil Respiration - Natural Resources Conservation Service
Soil Respiration - Natural Resources Conservation Service Journal

Reforestation, carbon sequestration and relationships between soil attributes in the Wet Tropics of Australia (Schmidt et al., 2014)

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Rainforests
  • Land Use Conservation / Protected Natural Areas
  • Assessment Conservation Target
  • Vegetation Forest
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 6 Jun 2026

Notes

Respiration rates below this threshold signal a shift from a complex conservation ecosystem to a simplified agroecosystem with impaired microbial function.