Bio-irrigation Rate Models for Port Phillip Bay Sediments

Deuterium tracer data from benthic incubation chambers models bio-irrigation rates in Port Phillip Bay sediments. The dataset includes results from seven chambers deployed at four sites, indicating advection depths of 20-50 cm and rates between 150 and 700 mL h-1. Data was contributed by the Australian Ocean Data Network and last updated in April 2026.

Use Cases

• Model bio-irrigation depth and rate from deuterium tracer concentration over incubation time.
• Compare irrigation rates across different bay regions using chamber deployment site data.
• Estimate whole-bay water column turnover time using the lower pore-water advection rate of 150 mL h-1.
• Assess tracer effectiveness by comparing dissolved caesium injection results with deuterium data.

Strengths

• Data from seven incubation chambers provides multiple measurement points.
• Model results specify concrete advection rates (150-700 mL h-1) and depths (20-50 cm).

Limitations

• Sample size is limited to seven chambers at four sites.
• Uncertainty is noted for caesium tracer results due to sediment adsorption.

Provenance

Source

Australian Ocean Data Network

Collection Method

Deuterium-enriched tracer introduced to benthic incubation chambers on the sea floor.

Freshness

Last updated in April 2026.

Geography

Port Phillip Bay, Australia.