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Datasets / Australian Ocean Data Network (AODN)

Nutrient sampling in the coastal waters of south eastern Tasmania

NutrientsSubsurface CurrentsSurface CurrentsPhytoplankton biomass and diversity

Biologically relevant macronutrients, nitrate + nitrite, silicate, phosphate and ammonia, were measured at all sites throughout the study. Nitrate + nitrite values (NOx) at the surface showed clear seasonal trends, peaking over winter and drawing down to near zero in summer and autumn. Phosphate concentrations also reached a peak in winter, which was associated with Southern Ocean influence. Median ammonium concentrations at all sites were generally <0.5 μM, with no clear peaks in any season or month. Overall, the lowest values were measured in August and other months showed reasonable spread around the median. Median silicate concentrations were consistently highest at sites 1 and 9, followed by site 5. Water from the River Derwent flows through site 1, then tracks east towards site 9 then site 5. Seasonally, silicate was generally highest in winter when the River Derwent outflow is also greatest.

Data and resources

Additional information

Temporal extent2009-11-01 – 2015-04-30
Date (creation)2018-06-25
Statuscompleted
Update frequencynotPlanned
Metadata languageen
LicenseThe data described in this record are the intellectual property of the University of Tasmania through the Institute for Marine and Antarctic Studies. Please contact Kerrie Swadling (Principal Investigator) if you wish to use the data.
Source metadataISO 19115 XML
Last updated2026-11-05
Created2026-11-05
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