Bass Strait Sediment and Benthic Fauna Survey 1979-1983

Museum Victoria conducted an extensive marine fauna survey of Bass Strait from 1979 to 1983, supplemented by sediment sampling and swath mapping. The results indicate a particularly diverse fauna with high small-scale variation, where longitude and depth are important factors explaining biological diversity. Analysis shows poor overall correlation between faunal composition and physical factors like sediment facies.

Use Cases

• Analyze the correlation between biological community composition and physical variables like longitude and depth.
• Map sediment facies identified in the survey and correlate them with known facies from the Otway margin.
• Examine the composition of sand and gravel fractions to assess the role of bioerosion and physical processes in producing carbonate mud.
• Compare biological patterns against the divisions of the Interim Marine and Coastal Regionalisation of Australia (IMCRA) for Bass Strait.
• Investigate the relationship between biogenic content in sediments and living communities, considering the abundance of soft-bodied organisms.

Strengths

• Data collection spans a multi-year survey period from 1979 to 1983.
• Integrates multiple data types: biological material from a range of taxonomic groups, sediment samples, swath mapping, and underwater video footage.
• Analysis identifies specific explanatory factors for biological diversity, such as longitude and depth.

Limitations

• Biological assemblages are described as not consistent enough to be mapped, limiting spatial modeling applications.
• Poor correlation between faunal composition and physical factors like sediments indicates complex, unmeasured environmental drivers.
• Lack of fines in sediments is attributed to the high-energy environment, which may limit analysis of finer sediment components.

Provenance

Source

Geoscience Australia Data, incorporating data from Museum Victoria, GA surveys, and the Australian Hydrographic Office.

Collection Method

Field survey collecting biological material, sediment sampling, swath mapping, and underwater video footage.

Time Range

1979 to 1983

Freshness

null

Geography

Bass Strait, between Victoria and Tasmania, Australia.