High-precision measurements of N2 in benthic chambers indicate denitrification rates of ~1.3 mmol N2 m-2 day-1 across major sedimentary facies. The dataset, from Geoscience Australia Data, quantifies biogenic N2, ammonia, nitrate, and nitrite fluxes, showing denitrifying efficiencies of 75-85% in muddy sediments covering about 70% of the seafloor. It was last updated on 2026-03-25.
Use Cases
- Modeling nitrogen budgets in coastal ecosystems based on measured N2, ammonia, nitrate, and nitrite fluxes.
- Assessing water quality impacts from sediment processes based on denitrification rates and efficiencies.
- Studying the coupling of ammonification, nitrification, and denitrification in marine sediments as described.
- Evaluating the effect of organic carbon loadings on nitrogen removal efficiency in benthic environments.
Strengths
- Provides direct, high-precision measurements of biogenic N2 fluxes.
- Reports specific denitrification rates (~1.3 mmol N2 m-2 day-1) and efficiencies (75-85%).
- Quantifies organic carbon loadings (~15-25 mmol m-2 day-1) and their relationship to nitrogen processing.
- Covers major sedimentary facies, including muddy sediments occupying about 70% of the seafloor.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Freshness should be verified despite the 2026 update date.
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- High-precision measurements from benthic chamber waters, including chambers 'spiked' with 15NO3.
- Freshness
- Last updated 2026-03-25 17:20:43.666009
- Geography
- Port Phillip Bay, Australia