Port Phillip Bay Sediment Denitrification Rates and Nitrogen Fluxes

High-precision measurements of N2 in benthic chamber waters indicated that denitrification occurs within the major sedimentary facies in Port Phillip Bay. The integrated fluxes of biogenic N2, ammonia, nitrate and nitrite showed that the stoichiometric relationship between organic C and N in the muddy sediments, occupying about 70% of the seafloor, was 5.7. This dataset from the Australian Ocean Data Network contains direct determinations of biogenic N2 and N-metabolite fluxes, with implications for water quality.

Use Cases

• Modeling coastal nitrogen budgets based on measured denitrification rates and N-metabolite fluxes.
• Assessing water quality impacts based on the relationship between organic carbon loadings and denitrifying efficiencies.
• Studying microbial coupling of ammonification, nitrification, and denitrification based on sediment process descriptions.
• Evaluating sediment nutrient processing efficiency based on the reported stoichiometric relationship between organic C and N.

Strengths

• High-precision measurements of N2 in benthic chamber waters.
• 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 impact on nitrogen processing.

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; last updated date is 2026-06-16 17:55:35.586856.

Provenance

Source

Australian Ocean Data Network

Collection Method

High-precision measurements from benthic chamber waters.

Freshness

2026-06-16 17:55:35.586856

Geography

Port Phillip Bay