Phytoplankton Data Collected During CPR Tows of the Southern Ocean - Australian Antarctic Division CopyEntry ID: ASAC_4107_Phytoplankton
Abstract: Data are "phytoplankton counts" for each phytoplankton taxon observed, from the CPR samples collected by the Southern Ocean CPR Survey projects 472 and 4107 (Hosie et al. 2003). The SAHFOS on-silk phytoplankton count method is used (Batten et al. 2003). Phytoplankton are identified to the best taxonomic level possible, ideally to species or at least genus, in 20 fields of view (295 plus or ... minus 10 microns) per sample (section of silk). See Figure 2 of Batten et al. (2003). Each sample usually represents 5 nautical miles for SO-CPR. The "phytoplankton count" is the number of fields of view where a phytoplankton species/ taxon was observed, recorded for each taxon for each sample. It is effectively a frequency of occurrence score.
The CPR is a device towed at normal ship speed, approximately 100 m behind the ship at a depth of 8-10 m. Plankton enter a small aperture 12.7 x 12.7 mm which then expands into a tunnel 100 x 50 mm reducing the speed by about 1/30. Plankton are then sandwiched between two sheets of 270 micron silk gauze, before rolling into a preservation tank of formaldehyde. Each tow is approximately 450 nautical miles. Regardless of ship speed the silk advances at a fixed rate of about 1 cm per nautical mile. Silks are cut into 5 nautical mile equivalent lengths and both phyto- an zooplankton are counted. Each sample is coded with time and date (GMT) and latitude and Longitude, plus averaged environmental data over the 5 nautical miles, e.g. water temperature, salinity, fluorescence, light. Zooplankton data and methods are described in Metadata record AADC-00099.
CPR, Continuous Plankton Recorder
SAHFOS, Sir Alister Hardy Foundation for Ocean Science
SO-CPR , Southern Ocean CPR Survey
Data Set Citation
Dataset Originator/Creator: Hosie, G. and McLeod, D.
Dataset Title: Phytoplankton Data Collected During CPR Tows of the Southern Ocean - Australian Antarctic Division Copy
Dataset Series Name: CAASM Metadata
Dataset Publisher: Australian Antarctic Data CentreOnline Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 2008-01-22
Quality This is an Australian Antarctic Division version of a metadata record on the IMOS portal, detailing the AADs contribution to the project. For further details about the data, and access to the data itself, see the metadata record at the Point of Truth URL.
Access Constraints These data are available from the IMOS portal - see the point of truth metadata URL for details.
Use Constraints This data set conforms to the PICCCBY Attribution License
To cite the local AAD version of this metadata record, please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_410... when using these data.
See the Point of Truth metadata record for overall citation details.
Financial support was also provided by IMOS AusCPR Survey.
Data Set Progress
Batten, S.D., Clark, R., Flinkman, J., Hays, G., John, E., John, A.W.G., Jonas, T., Lindley, J.A., Stevens. D.P., Walne, A. (2003), CPR Sampling: the technical background, materials and methods, consistency and comparability., Progress in Oceanography, 58, 2-4, 193-215
Hosie, G.W., Fukuchi, M. and Kawaguchi, S. (2003), Development of the Southern Ocean Continuous Plankton Recorder Survey., Progress in Oceanography, 58, 2-4, 263-283
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2013-01-21
Last DIF Revision Date: 2016-11-18