From Australian Oceans Data Network
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Nutrient sampling in the coastal waters of south eastern Tasmania

Created 23/06/2025

Updated 23/06/2025

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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.

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Additional Info

Field Value
Title Nutrient sampling in the coastal waters of south eastern Tasmania
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/176cfcf7-ba50-4c85-be2c-2e170bf79c4e
Contact Point
Australian Ocean Data Network
k.swadling@utas.edu.au
Reference Period 01/11/2009 - 30/04/2015
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        147.362548828,
        -43.3548230459
      ],
      [
        147.71685791,
        -43.3548230459
      ],
      [
        147.71685791,
        -43.0123609615
      ],
      [
        147.362548828,
        -43.0123609615
      ],
      [
        147.362548828,
        -43.3548230459
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Nutrient sampling in the coastal waters of south eastern Tasmania". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/nutrient-sampling-in-the-coastal-waters-of-south-eastern-tasmania