Seabed Disturbance and Ecological Index Maps for Australia's Continental Shelf

Models of seabed sediment mobilisation examine the intermediate disturbance hypothesis for Australia's continental shelf. The analysis predicts the spatial distribution of an ecological disturbance index based on wave, tide, and cyclone energy. This work by the Australian Ocean Data Network represents a first-of-its-kind analysis for any continental shelf.

Use Cases

• Identify areas of high ecological disturbance based on modeled sediment mobilisation frequency and magnitude.
• Assess the relationship between physical energy sources (wave, tide, cyclone) and seabed disturbance regimes.
• Evaluate the intermediate disturbance hypothesis for marine biodiversity using derived ecological disturbance index maps.

Strengths

• Analysis focuses on high-energy, patch-clearing events defined by a Shields parameter threshold of 0.25.
• The study models disturbance recurrence intervals in relation to rates of ecological succession for different substrates.
• Covers Australia's continental shelf, with an estimated ~10% characterized by the defined disturbance regime.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The study addresses only physical disturbance by waves and currents, excluding biological, temperature, salinity, and anthropogenic processes.

Provenance

Source

Australian Ocean Data Network

Collection Method

Models of seabed sediment mobilisation.

Freshness

Last updated 2026-06-23 02:03:05.389339; freshness should be verified.

Geography

Australia's continental shelf