Australia's Marine Benthic Bioregionalisation and Seascape Maps

Australia's Exclusive Economic Zone is characterized by a biophysical dataset supporting marine protected area planning. The dataset includes a geomorphic features map derived from seabed bathymetry and a 2005 Benthic Bioregionalisation dividing the EEZ into 41 bioregions. It was created by Geoscience Australia and the Australian Ocean Data Network, integrating variables like seabed slope, primary production, sediment properties, and temperature.

Use Cases

• Designing marine protected area networks by analyzing the spatial distribution of the 41 bioregions and 24 unique provinces.
• Predicting benthic biodiversity distribution using integrated seascape maps that layer variables like seabed slope, sediment properties, and ocean temperature.
• Assessing habitat characteristics on the continental margin by analyzing geomorphic features derived from seabed bathymetry data.
• Studying the relationship between broad-scale biophysical variables, such as primary production and sediment mobilization, and fish diversity information.

Strengths

• Covers Australia's entire Exclusive Economic Zone, a significant spatial scope.
• Integrates multiple data layers including bathymetry, geomorphology, fish diversity, and oceanographic variables.
• Provides a structured bioregionalisation with 41 defined bioregions and 24 provinces.

Limitations

• Core bioregionalisation is from 2005, potentially missing recent ecological changes.
• Relies on surrogates like geomorphology due to absence of direct, comprehensive seabed biodiversity distribution data.
• Specific row counts, sample sizes, and data resolution details are unavailable.

Provenance

Source

Australian Ocean Data Network and Geoscience Australia.

Collection Method

Integration and analysis of existing seabed bathymetry data, fish diversity information, and other biophysical variables to create geomorphic and seascape maps.

Time Range

Bioregionalisation dated to 2005; underlying data collection periods unspecified.

Freshness

Metadata indicates a last update in 2026, but the core bioregionalisation product is from 2005.

Geography

Australia's Exclusive Economic Zone (EEZ), including commonwealth and state waters.