Microbial Biomass Carbon (MBC)
Benchmark Value
Scoring Curve
The scoring engine could not generate a curve for this benchmark context. The primary form is CompositeFramework, 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
The benchmark value of 425 mg/kg represents the best available condition for a healthy, fire-adapted tropical savanna conservation area.
Microbial Biomass Carbon (MBC) as the total mass of living microorganisms within the soil, measured as carbon content.
Microbial Biomass Carbon (MBC) represents the living microbial component of soil organic matter, measured as carbon mass, indicating healthy soil microbial activity in tropical savanna conservation areas.
The benchmark is derived using a proxy method applying a Microbial Quotient (MQ) of 2.5% to the mean Soil Organic Carbon (SOC) of 1.7% measured at the Ranger Conceptual Reference Ecosystem, representing best-practice conservation management.
Sources (2)
Interpreting Microbial Biomass Carbon | Fact Sheets | soilquality.org.au, accessed July 18, 2025,
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Supervising Scientist Report 671: Woody biomass dynamics at Paradise Farm, a long-term fire experiment in the savannas of northern Australia
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Additional references from the underlying research that informed this benchmark.
Altered soil microbial community at elevated CO2 leads to loss of soil carbon - PNAS, accessed July 28, 2025,
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The biodiversity cost of carbon sequestration in tropical savanna - PMC - PubMed Central
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Microbial Biomass C, N and P in Disturbed Dry Tropical Forest Soils, India
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