Data

Chlorophyll sampling in the coastal waters of south eastern Tasmania

University of Tasmania, Australia

Swadling, Kerrie, Dr ; Eriksen, Ruth, Dr ; Beard, Jason, Mr ; Crawford, Christine, Dr

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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/948e4895-5be1-4a84-af35-016ced9b2245&rft.title=Chlorophyll sampling in the coastal waters of south eastern Tasmania&rft.identifier=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/948e4895-5be1-4a84-af35-016ced9b2245&rft.description=Chlorophyll a concentration is widely used as a proxy to describe trends in phytoplankton biomass over spatial and temporal scales. The concentration of chlorophyll a in Storm Bay showed surprisingly little variation across the seasons. There was a gradient in concentration from site 1 to site 3, where chlorophyll a decreased slightly. It was highest and most variable at the inshore sites 1 and 9, and lowest at site 3, furthest out in the bay. There was no clear annually recurrent seasonal bloom, although data suggests higher values in spring and autumn (see later time series).Maintenance and Update Frequency: notPlannedStatement: An integrated water column sample (12 m) using a weighted hose was collected for chlorophyll a analysis from February 2010. Prior to this, samples were collected from 1 m below the surface. Following the decision to include the integrated sampler, the sampling regime was revised in the following way. The contents of four sampling tube collections were mixed together and sub-sampled: 2 L samples for chlorophyll a were kept cold and dark until processing in the laboratory on return to shore. Water samples were also 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. Chlorophyll a concentrations were determined after extraction of photosynthetic pigments using acetone 90:10 water (vol/vol), sonification and centrifuging to remove filter paper. Absorbances were measured using a Varian CBE cintra 10E spectrometer, and standard equations were applied to determine chlorophyll concentrations.&rft.creator=Swadling, Kerrie, Dr &rft.creator=Eriksen, Ruth, Dr &rft.creator=Beard, Jason, Mr &rft.creator=Crawford, Christine, Dr &rft.date=2020&rft.coverage=westlimit=147.362548828; southlimit=-43.3548230459; eastlimit=147.71685791; northlimit=-43.0123609615&rft.coverage=westlimit=147.362548828; southlimit=-43.3548230459; eastlimit=147.71685791; northlimit=-43.0123609615&rft.coverage=uplimit=90; downlimit=0&rft.coverage=uplimit=90; downlimit=0&rft_rights=Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/&rft_rights=Swadling, K.M., Eriksen, R.S., Beard, J.M. and Crawford, C.M. (2018) Phytoplankton sampling in the coastal waters of south eastern Tasmania. Institute for Marine and Antarctic Studies, University of Tasmania. Data accessed at http://metadata.imas.utas.edu.au/geonetwork/srv/en/metadata.show?uuid=948e4895-5be1-4a84-af35-016ced9b2245 on (access date).&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=EARTH SCIENCE | AGRICULTURE | AGRICULTURAL AQUATIC SCIENCES | AQUACULTURE&rft_subject=EARTH SCIENCE | TERRESTRIAL HYDROSPHERE | WATER QUALITY/WATER CHEMISTRY&rft_subject=EARTH SCIENCE | OCEANS | OCEAN CIRCULATION | OCEAN CURRENTS&rft_subject=EARTH SCIENCE | BIOLOGICAL CLASSIFICATION | PROTISTS | FLAGELLATES | DINOFLAGELLATES&rft_subject=EARTH SCIENCE | OCEANS | OCEAN CHEMISTRY | PIGMENTS | CHLOROPHYLL&rft_subject=Storm Bay&rft_subject=Biological Oceanography&rft_subject=EARTH SCIENCES&rft_subject=OCEANOGRAPHY&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=Temperate Reef&rft_subject=research vessel&rft_subject=Concentration of chlorophyll-a per unit volume of the water body&rft_subject=Downwelling vector irradiance as photons (PAR wavelengths) in the water body&rft_subject=Secchi depth&rft_subject=Sea-floor depth below surface of the water body&rft_subject=Concentration of chlorophyll-b per unit volume of the water body&rft_subject=Concentration of total chlorophyll-c per unit volume of the water body&rft_subject=Concentration of phaeophytin per unit volume of the water body&rft_subject=GC_CHLOROPHYLL_A_STDDEV&rft_subject=PT_CHLOROPHYLL_A_STDDEV&rft_subject=PP_CHLOROPHYLL_A_STDDEV&rft_subject=PT_CHLOROPHYLL_B_STDDEV&rft_subject=PT_CHLOROPHYLL_C_STDDEV&rft_subject=PHAEOPHYTIN_STDDEV&rft_subject=LI-COR LI-192 PAR sensor&rft_subject=spectrophotometers&rft.type=dataset&rft.language=English Access the data

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Swadling, K.M., Eriksen, R.S., Beard, J.M. and Crawford, C.M. (2018) Phytoplankton sampling in the coastal waters of south eastern Tasmania. Institute for Marine and Antarctic Studies, University of Tasmania. Data accessed at http://metadata.imas.utas.edu.au/geonetwork/srv/en/metadata.show?uuid=948e4895-5be1-4a84-af35-016ced9b2245 on (access date).

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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Chlorophyll a concentration is widely used as a proxy to describe trends in phytoplankton biomass over spatial and temporal scales. The concentration of chlorophyll a in Storm Bay showed surprisingly little variation across the seasons. There was a gradient in concentration from site 1 to site 3, where chlorophyll a decreased slightly. It was highest and most variable at the inshore sites 1 and 9, and lowest at site 3, furthest out in the bay. There was no clear annually recurrent seasonal bloom, although data suggests higher values in spring and autumn (see later time series).

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Maintenance and Update Frequency: notPlanned

Statement: An integrated water column sample (12 m) using a weighted hose was collected for chlorophyll a analysis from February 2010. Prior to this, samples were collected from 1 m below the surface. Following the decision to include the integrated sampler, the sampling regime was revised in the following way. The contents of four sampling tube collections were mixed together and sub-sampled: 2 L samples for chlorophyll a were kept cold and dark until processing in the laboratory on return to shore. Water samples were also 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. Chlorophyll a concentrations were determined after extraction of photosynthetic pigments using acetone 90:10 water (vol/vol), sonification and centrifuging to remove filter paper. Absorbances were measured using a Varian CBE cintra 10E spectrometer, and standard equations were applied to determine chlorophyll concentrations.

Notes

Credit
Fisheries Research and Development Corporation (FRDC)

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

This dataset is part of a larger collection

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text: westlimit=147.362548828; southlimit=-43.3548230459; eastlimit=147.71685791; northlimit=-43.0123609615

text: uplimit=90; downlimit=0

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Swadling, K. M., Eriksen, R. S., Beard, J. M., & Crawford, C. (2017). Salmon sub-program: Marine currents, nutrients and plankton in the coastal waters of south eastern Tasmania and responses to changing weather patterns (Technical Report). Institute for Marine and Antarctic Studies, University of Tasmania. (Associated publication)

url : https://data.imas.utas.edu.au/attachments/3b002636-f1b2-441d-a135-f043df3c8c15/2014-031-DLD.pdf External Link

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url : https://data.imas.utas.edu.au/portal/search?uuid=948e4895-5be1-4a84-af35-016ced9b2245 External Link

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Chlorophyll sampling in the coastal waters of south eastern Tasmania

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This dataset is part of a larger collection

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(This OGC WFS returns the chlorophyll sampling data in CSV format.)

Download data in a range of formats via OGC WFS. (ECP_GEOSERVER_CHLOROPHYLL)

MAP - Chlorophyll sampling locations (ECP_GEOSERVER_CHLOROPHYLL)

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