Dataset

Nutrient sampling in the coastal waters of south eastern Tasmania

Australian Ocean Data Network
Swadling, Kerrie, Dr
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://metadata.imas.utas.edu.au:/geonetwork/srv/en/metadata.show?uuid=d8e21793-beff-4f82-8807-d6c80557b6c2&rft.title=Nutrient sampling in the coastal waters of south eastern Tasmania&rft.identifier=http://metadata.imas.utas.edu.au:/geonetwork/srv/en/metadata.show?uuid=d8e21793-beff-4f82-8807-d6c80557b6c2&rft.publisher=Institute for Marine and Antarctic Studies, University of Tasmania&rft.description=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 Water samples were collected, using a 6 L or 8 L Niskin bottle, from 0.5 – 1 m below the surface, at 10 m depth, and within 5 m of the seabed. At site 3 an intermediate sample from 50 m was also collected. Subsamples were taken at each depth for macronutrients (unfiltered), and were frozen and stored in the dark until processing at the CSIRO Marine and Atmospheric Laboratories, Hobart. The biologically relevant nutrients, dissolved nitrate+nitrite, phosphate, ammonia and silicate concentrations (μM) were measured by CSIRO Hydrochemistry laboratory using standard colorimetric methodology adapted for flow injection analysis on a 5-channel Lachat Quick Chem 8000 series Automated Ion Analyser. Method detection limits were 0.02 μM P, 0.05 μM N, 0.05 μM Si, and 0.05 μM ammonia.&rft.creator=Swadling, Kerrie, Dr &rft.date=2018&rft.relation=https://data.imas.utas.edu.au/attachments/3b002636-f1b2-441d-a135-f043df3c8c15/2014-031-DLD.pdf&rft.coverage=northlimit=-43.0123609615; southlimit=-43.3548230459; westlimit=147.362548828; eastLimit=147.71685791&rft_rights=Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/&rft_rights=Please contact Kerrie Swadling (Principal Investigator) if you wish to use the data.&rft_rights=The 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.&rft_subject=biota&rft_subject=PHYTOPLANKTON&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=AQUATIC ECOSYSTEMS&rft_subject=PLANKTON&rft_subject=AQUACULTURE&rft_subject=AGRICULTURE&rft_subject=AGRICULTURAL AQUATIC SCIENCES&rft_subject=WATER QUALITY/WATER CHEMISTRY&rft_subject=TERRESTRIAL HYDROSPHERE&rft_subject=OCEAN CURRENTS&rft_subject=OCEANS&rft_subject=OCEAN CIRCULATION&rft_subject=DINOFLAGELLATES&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=PROTISTS&rft_subject=FLAGELLATES&rft_subject=Storm Bay&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=Biological Oceanography&rft_subject=EARTH SCIENCES&rft_subject=OCEANOGRAPHY&rft_subject=Temperate Reef&rft.type=dataset&rft.language=English Access the data

Licence & Rights:

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CC-BY

Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/

Please contact Kerrie Swadling (Principal Investigator) if you wish to use the data.

The 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.

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Full description

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.

Lineage

Water samples were collected, using a 6 L or 8 L Niskin bottle, from 0.5 – 1 m below the surface, at 10 m depth, and within 5 m of the seabed. At site 3 an intermediate sample from 50 m was also collected. Subsamples were taken at each depth for macronutrients (unfiltered), and were frozen and stored in the dark until processing at the CSIRO Marine and Atmospheric Laboratories, Hobart. The biologically relevant nutrients, dissolved nitrate+nitrite, phosphate, ammonia and silicate concentrations (μM) were measured by CSIRO Hydrochemistry laboratory using standard colorimetric methodology adapted for flow injection analysis on a 5-channel Lachat Quick Chem 8000 series Automated Ion Analyser. Method detection limits were 0.02 μM P, 0.05 μM N, 0.05 μM Si, and 0.05 μM ammonia.

Created: 2018-06-25

Data time period: 2009-11-01 to 2015-04-30

This dataset is part of a larger collection

Click to explore relationships graph

147.71685791,-43.0123609615 147.71685791,-43.3548230459 147.362548828,-43.3548230459 147.362548828,-43.0123609615 147.71685791,-43.0123609615

147.539703369,-43.1835920037

Other Information
DATA ACCESS - Nutrient sampling [direct download]

uri : https://geoserver.imas.utas.edu.au/geoserver/wfs

URI : https://geoserver.imas.utas.edu.au/geoserver/wfs?version=1.0.0&request=GetFeature&typeName=imas:ECP_GEOSERVER_NUTRIENTS&outputFormat=csv

MAP - Nutrient sampling locations (imas:ECP_GEOSERVER_NUTRIENTS)

uri : https://geoserver.imas.utas.edu.au/geoserver/wms

This OGC WFS service returns the data in subsettable CSV format. (imas:ECP_GEOSERVER_NUTRIENTS)

uri : https://geoserver.imas.utas.edu.au/geoserver/wfs

View and download this data through the interactive IMAS Data Portal.

uri : https://data.imas.utas.edu.au/portal/search

URI : https://data.imas.utas.edu.au/portal/search?uuid=d8e21793-beff-4f82-8807-d6c80557b6c2