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

Summer measurements from 1994 and 1995 at various sites in Port Phillip Bay, Australia, define solute exchange rates between sediment and water. The data, from Geoscience Australia, indicate benthic recycling accounted for 63% and 72% of annualized nitrogen and phosphorus inputs to the bay, respectively, while denitrification removed 63% of potentially recyclable nitrogen.

Use Cases

• Modeling coastal nutrient budgets based on benthic flux rates for oxygen, ammonium, nitrate, and phosphate.
• Comparing regional sediment biogeochemistry based on the identification of four distinct bay regions with varying nutrient regeneration rates.
• Studying the relationship between bio-irrigation and denitrification efficiency using radon-222 and CsCl tracer methods described in the data.
• Assessing the significance of benthic recycling relative to other nutrient sources like riverine, atmospheric, and effluent inputs.

Strengths

• Measurements cover two consecutive summers (1994 and 1995), providing year-to-year comparison.
• Quantifies flux variability within sites as ±50%.
• Identifies a northern region with nutrient regeneration rates 3-30 times greater than other areas.
• Provides bay-wide percentages for benthic nutrient contribution (63% N, 72% P) and loss via denitrification (63% of recyclable N).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-04-20 03:33:01.177986; freshness should be verified.

Provenance

Source

Geoscience Australia Data

Collection Method

Benthic chamber measurements of solutes (oxygen, ammonium, nitrate, nitrite, phosphate, silicate, TCO2, alkalinity) and tracer studies using radon-222 and CsCl.

Time Range

Summers of 1994 and 1995

Freshness

Last updated 2026-04-20 03:33:01.177986

Geography

Port Phillip Bay, Australia, with measurements at various sites throughout the bay.