Benthic Nutrient Flux Measurements in Port Phillip Bay, Australia, 1994-1995

Benthic chamber measurements from the Australian Ocean Data Network quantify solute exchange between sediment and water in Port Phillip Bay. Data from the summers of 1994 and 1995 includes rates for oxygen, ammonium, nitrate, nitrite, phosphate, silicate, TCO2, and alkalinity. The dataset distinguishes four bay regions and calculates benthic recycling's contribution to total nitrogen and phosphorus inputs.

Use Cases

• Modeling coastal nutrient budgets based on measured benthic recycling rates for nitrogen and phosphorus.
• Analyzing spatial variability in sediment-water solute exchange based on measurements from various sites throughout the bay.
• Studying denitrification efficiency in coastal sediments based on the described loss of potentially recyclable nitrogen.
• Investigating the relationship between bio-irrigation and denitrification based on the negative correlation described.
• Comparing nutrient regeneration rates between different bay regions, such as the northern region identified with higher rates.

Strengths

• Quantifies benthic recycling as accounting for 63% and 72% of annualized N and P inputs to the bay.
• Identifies a northern region with nutrient regeneration rates 3-30 times greater than other areas.
• Compares within-site variability to year-to-year variability, reported as ±50%.
• Uses multiple measurement methods, including radon-222 and CsCl spike injections, to study bio-irrigation.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is from a specific time period (summers of 1994 and 1995); applicability to current conditions may be limited.
• Row count and file size are unknown, which may limit suitability assessment.

Provenance

Source

Australian Ocean Data Network

Collection Method

Benthic chamber measurements of reactants and products involved with biogenic matter remineralization.

Time Range

Summers of 1994 and 1995

Freshness

Last updated 2026-04-10 17:18:34.925615; freshness should be verified.

Geography

Port Phillip Bay, Australia