Phytoplankton Abundance And Biovolume From Australian Coastal Stations

IMOS National Reference Station data provides phytoplankton abundance and biovolume estimates from nine regular sampling stations around the Australian coastline. The Australian Ocean Data Network manages this dataset, which includes samples collected monthly via integrated water sampling at 10m depth intervals. Data products are binned for time series analysis and account for taxonomic changes over time.

Use Cases

• Analyze temporal trends in phytoplankton community composition using the 'abundance (cells/l)' and 'biovolume (um3/L)' fields across nine stations.
• Model species distribution changes by utilizing the 'Genus product' or 'Species product' which bin data to different taxonomic levels.
• Identify real species absences versus unsearched taxa by interpreting the -999 flag for abundance values in time series analysis.
• Assess coastal water quality and ecosystem responses by correlating phytoplankton metrics with other IMOS mooring network data using station metadata.
• Study the impact of analyst training on taxonomic resolution over time by referencing the provided change log tables for taxa validity dates.

Strengths

• Data spans nine reference stations sampled regularly around the Australian coastline.
• Includes four distinct data products (Raw, Species, Genus, Higher taxonomic group) binned for specific analytical needs.
• Explicitly flags data quality with -999 values indicating a species was not looked for, aiding in time series analysis.

Limitations

• Taxonomic resolution has changed over time, requiring careful use of change logs to interpret data validity across periods.
• Sampling frequency is reduced to three-monthly at Esperance and Ningaloo stations compared to monthly elsewhere.
• Classification fields like genus and species may be blank if identification was only possible to a higher taxonomic level.

Provenance

Source

Integrated Marine Observing Systems (IMOS) National Mooring Network.

Collection Method

Monthly integrated water samples collected with Niskin bottles at 10m depth intervals, preserved in Lugol's solution, and analyzed by the Plankton Ecology Lab.

Time Range

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Freshness

Data is updated regularly with monthly sampling; last platform update recorded as 2026-04-04.

Geography

Nine coastal stations around Australia, including Darwin, Esperance, Maria Island, and the Great Australian Bight.