Data

Phytoplankton Data Collected During CPR Tows of the Southern Ocean - Australian Antarctic Division Copy

Australian Antarctic Data Centre
HOSIE (Retired), GRAHAM ; MCLEOD, DAVID
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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://data.aad.gov.au/metadata/records/ASAC_4107_Phytoplankton&rft.title=Phytoplankton Data Collected During CPR Tows of the Southern Ocean - Australian Antarctic Division Copy&rft.identifier=https://data.aad.gov.au/metadata/records/ASAC_4107_Phytoplankton&rft.publisher=Australian Antarctic Data Centre&rft.description=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. Abbreviations CPR, Continuous Plankton Recorder SAHFOS, Sir Alister Hardy Foundation for Ocean Science SO-CPR , Southern Ocean CPR Survey&rft.creator=HOSIE (Retired), GRAHAM &rft.creator=MCLEOD, DAVID &rft.date=2013&rft.coverage=northlimit=-44.0; southlimit=-70.0; westlimit=80.0; eastLimit=160.0; projection=WGS84&rft.coverage=northlimit=-44.0; southlimit=-70.0; westlimit=80.0; eastLimit=160.0; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). 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_4107_Phytoplankton when using these data. See the Point of Truth metadata record for overall citation details. Financial support was also provided by IMOS AusCPR Survey.&rft_subject=biota&rft_subject=oceans&rft_subject=PHYTOPLANKTON&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=PROTISTS&rft_subject=PLANKTON&rft_subject=Akademik Fedorov&rft_subject=Ary Rongel&rft_subject=Hakuho Maru&rft_subject=Kaiyo Maru&rft_subject=Shirase&rft_subject=Shirase II&rft_subject=San Aotea II&rft_subject=CPR > Continuous Plankton Recorder&rft_subject=R/V AA > R/V Aurora Australis&rft_subject=SHIPS&rft_subject=R/V POLARSTERN&rft_subject=R/V TANGAROA&rft_subject=R/V OSHORO-MARU&rft_subject=R/V YUZ > R/V YUZHMORGEOLOGIYA&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). 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_4107_Phytoplankton when using these data. See the Point of Truth metadata record for overall citation details. Financial support was also provided by IMOS AusCPR Survey.

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Brief description

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. Abbreviations CPR, Continuous Plankton Recorder SAHFOS, Sir Alister Hardy Foundation for Ocean Science SO-CPR , Southern Ocean CPR Survey

Issued: 2013-01-21

Data time period: 2008-01-22

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text: northlimit=-44.0; southlimit=-70.0; westlimit=80.0; eastLimit=160.0; projection=WGS84

Subjects
Akademik Fedorov | Ary Rongel | BIOLOGICAL CLASSIFICATION | CPR > Continuous Plankton Recorder | EARTH SCIENCE | GEOGRAPHIC REGION > POLAR | Hakuho Maru | Kaiyo Maru | OCEAN > SOUTHERN OCEAN | PHYTOPLANKTON | PLANKTON | PROTISTS | R/V AA > R/V Aurora Australis | R/V OSHORO-MARU | R/V POLARSTERN | R/V TANGAROA | R/V YUZ > R/V YUZHMORGEOLOGIYA | SHIPS | San Aotea II | Shirase | Shirase II | biota | oceans |

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