Australian Zooplankton Biomass Time Series from Nine Coastal Stations

Nine National Reference Stations around Australia conduct monthly zooplankton biomass sampling using a standardized drop net. The program analyzes community composition, dry weight biomass, and size spectrum, with Port Hacking station data extending from 2002.

Use Cases

• Analyze monthly trends in dry weight biomass (mg/m3) across nine coastal stations to assess seasonal productivity cycles.
• Model zooplankton community composition (Taxon/m3) against environmental variables from other IMOS datasets.
• Conduct size spectrum analysis using Zooscan data to study trophic structure changes over time.
• Compare historical sampling from Port Hacking station (2002-2009) with current data to build enhanced long-term time series.

Strengths

• Data collection follows a standardized protocol using a 60 cm diameter, 100 micron mesh drop net weighted to fall at 1 m/s.
• Samples are taken monthly at nine stations around the Australian coastline, providing broad spatial coverage.
• Analysis includes three specific metrics: community composition, dry weight biomass, and size spectrum.

Limitations

• Sampling frequency is reduced to three-monthly at Esperance and Ningaloo stations, creating temporal gaps.
• Historical Port Hacking data (2002-2009) was collected with a different, smaller net (20 cm diameter), complicating direct time-series continuity.
• Data format includes HTML and WMS, which may require specialized tools for extraction and analysis compared to structured tabular formats.

Provenance

Source

CSIRO Marlin Data Catalogue via the Integrated Marine Observing System (IMOS) Plankton National Reference Station program.

Collection Method

Monthly zooplankton sampling via drop net at nine coastal stations; samples are fixed in formalin or frozen for molecular analysis.

Time Range

Ongoing monthly sampling; Port Hacking station time series includes data from 2002.

Freshness

Updated monthly, with last platform update in March 2026.

Geography

Nine National Reference Stations around the Australian coastline.