Nella Dan: AAMBER Cruise Chlorophyll a Data
Progress Code: completed Statement: These are old data, and have been archived almost 30 years after they were collected. Some information regarding their collection has undoubtedly been lost. The composition, size and abundance of phytoplankton and microzooplankton were measured across a transect f...
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ftands:oai:ands.org.au::2818692 2023-12-03T10:11:10+01:00 Nella Dan: AAMBER Cruise Chlorophyll a Data Spatial: westlimit=60; southlimit=-70.0; eastlimit=90; northlimit=-61.0 Temporal: From 1987-03-07 to 1987-03-23 https://researchdata.edu.au/nella-dan-aamber-chlorophyll-data/2818692 unknown Australian Ocean Data Network https://researchdata.edu.au/nella-dan-aamber-chlorophyll-data/2818692 AAMBER_phyto Dataset DOI AU/AADC > Australian Antarctic Data Centre, Australia biota oceans EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON AAMBER Chlorophyll a SHIPS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR dataset ftands 2023-11-06T23:50:29Z Progress Code: completed Statement: These are old data, and have been archived almost 30 years after they were collected. Some information regarding their collection has undoubtedly been lost. The composition, size and abundance of phytoplankton and microzooplankton were measured across a transect from Prydz Bay to Australia during late March 1987. Phytoplankton populations were low, with concentrations of chlorophyll a ranging from 0.08 to 0.22 mg.m-3. Small cells predominated numerically; nanoplankton consistently represented 55 to 68% of the total cell number while picoplankton represented 27 to 44%. Microplankton never represented more than 3% of cells by number, but constituted 57 to 93% of the total cell volume, and accounted for most of the latitudinal variation in total volume. Small flagellates, not identifiable by light microscopy, were the most numerous cells encountered across the transect, with a five-fold increase in abundance at 47S. Numbers of diatoms (most less than 20 microns in size) increased markedly south of the Antarctic Convergence, with a strong correlation to the concentration of silica. Dinoflagellate numbers were relatively constant across the transect, although somewhat higher north of 50S. Those less than 20 microns in size were most numerous and accounted for most of the numerical variation. HPLC analysis of chlorophyll and carotenoid pigments showed a peak of peridinin which coincided with the flagellate peak at 47S, but not with observed dinoflagellates, suggesting that the flagellate peak included unrecognized dinoflagellates. Chlorophyll b and prasinoxanthin were also associated, suggesting a significant contribution by prasinophytes. Almost no cyanobacteria were observed south of the convergence, although very large numbers, which correlated with the abundance of zeaxanthin, were encountered to the north. Numbers of ciliates and tintinnids were quite variable although they followed each other closely. Numbers of both were low in the region of the Antarctic Convergence. Dataset Antarc* Antarctic Prydz Bay Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean The Antarctic Prydz Bay |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON AAMBER Chlorophyll a SHIPS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON AAMBER Chlorophyll a SHIPS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR Nella Dan: AAMBER Cruise Chlorophyll a Data |
topic_facet |
biota oceans EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON AAMBER Chlorophyll a SHIPS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
description |
Progress Code: completed Statement: These are old data, and have been archived almost 30 years after they were collected. Some information regarding their collection has undoubtedly been lost. The composition, size and abundance of phytoplankton and microzooplankton were measured across a transect from Prydz Bay to Australia during late March 1987. Phytoplankton populations were low, with concentrations of chlorophyll a ranging from 0.08 to 0.22 mg.m-3. Small cells predominated numerically; nanoplankton consistently represented 55 to 68% of the total cell number while picoplankton represented 27 to 44%. Microplankton never represented more than 3% of cells by number, but constituted 57 to 93% of the total cell volume, and accounted for most of the latitudinal variation in total volume. Small flagellates, not identifiable by light microscopy, were the most numerous cells encountered across the transect, with a five-fold increase in abundance at 47S. Numbers of diatoms (most less than 20 microns in size) increased markedly south of the Antarctic Convergence, with a strong correlation to the concentration of silica. Dinoflagellate numbers were relatively constant across the transect, although somewhat higher north of 50S. Those less than 20 microns in size were most numerous and accounted for most of the numerical variation. HPLC analysis of chlorophyll and carotenoid pigments showed a peak of peridinin which coincided with the flagellate peak at 47S, but not with observed dinoflagellates, suggesting that the flagellate peak included unrecognized dinoflagellates. Chlorophyll b and prasinoxanthin were also associated, suggesting a significant contribution by prasinophytes. Almost no cyanobacteria were observed south of the convergence, although very large numbers, which correlated with the abundance of zeaxanthin, were encountered to the north. Numbers of ciliates and tintinnids were quite variable although they followed each other closely. Numbers of both were low in the region of the Antarctic Convergence. |
format |
Dataset |
title |
Nella Dan: AAMBER Cruise Chlorophyll a Data |
title_short |
Nella Dan: AAMBER Cruise Chlorophyll a Data |
title_full |
Nella Dan: AAMBER Cruise Chlorophyll a Data |
title_fullStr |
Nella Dan: AAMBER Cruise Chlorophyll a Data |
title_full_unstemmed |
Nella Dan: AAMBER Cruise Chlorophyll a Data |
title_sort |
nella dan: aamber cruise chlorophyll a data |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/nella-dan-aamber-chlorophyll-data/2818692 |
op_coverage |
Spatial: westlimit=60; southlimit=-70.0; eastlimit=90; northlimit=-61.0 Temporal: From 1987-03-07 to 1987-03-23 |
geographic |
Antarctic Southern Ocean The Antarctic Prydz Bay |
geographic_facet |
Antarctic Southern Ocean The Antarctic Prydz Bay |
genre |
Antarc* Antarctic Prydz Bay Southern Ocean |
genre_facet |
Antarc* Antarctic Prydz Bay Southern Ocean |
op_source |
AU/AADC > Australian Antarctic Data Centre, Australia |
op_relation |
https://researchdata.edu.au/nella-dan-aamber-chlorophyll-data/2818692 AAMBER_phyto Dataset DOI |
_version_ |
1784276107841765376 |