High-precision measurements of N2 fluxes indicate denitrification occurs across 70% of Port Phillip Bay's seafloor. Integrated fluxes of biogenic N2, ammonia, nitrate, and nitrite show a stoichiometric C:N ratio of 5.7 in muddy sediments. The data, sourced from the Australian Ocean Data Network, reveals denitrifying efficiencies of 75-85% at moderate organic carbon loadings.
Use Cases
- Modeling nitrogen removal efficiency in sediments based on reported denitrification rates (~1.3 mmol N2 m-2 day-1).
- Analyzing the impact of organic carbon loading on nutrient release based on fluxes of ammonia, nitrate, and nitrite.
- Studying the coupling of microbial processes (ammonification, nitrification, denitrification) as described in the chamber experiments.
Strengths
- High-precision measurements of N2 fluxes are explicitly mentioned.
- Flux data includes multiple nitrogen metabolites: biogenic N2, ammonia, nitrate, and nitrite.
- Stoichiometric relationships (C:N ratio of 5.7) and efficiency ranges (75-85%) are quantified.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data may reflect geographic bias inherent to data_gov_au, focusing solely on Port Phillip Bay.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Likely contains direct determinations from benthic chamber experiments, as described.
- Freshness
- Last updated 2026-04-16 14:22:12.436580; freshness should be verified.
- Geography
- Port Phillip Bay