Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth
Some large and/or entangled frustules of some large diatom taxa, such as Thalassiothrix, could have been be retained in the 1 mm screen mesh, and therefore, underrepresented in this study. Diatom and biogenic particle fluxes were investigated over a two-year and six-year periods at the Subantarctic...
id |
ftands:oai:ands.org.au::687139 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PLANTS MICROALGAE BIOGENIC SEDIMENTS MARINE SEDIMENTS Particle Flux SHIPS R/V AA > R/V Aurora Australis AMD AMD/AU CEOS ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PLANTS MICROALGAE BIOGENIC SEDIMENTS MARINE SEDIMENTS Particle Flux SHIPS R/V AA > R/V Aurora Australis AMD AMD/AU CEOS ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth |
topic_facet |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PLANTS MICROALGAE BIOGENIC SEDIMENTS MARINE SEDIMENTS Particle Flux SHIPS R/V AA > R/V Aurora Australis AMD AMD/AU CEOS ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
description |
Some large and/or entangled frustules of some large diatom taxa, such as Thalassiothrix, could have been be retained in the 1 mm screen mesh, and therefore, underrepresented in this study. Diatom and biogenic particle fluxes were investigated over a two-year and six-year periods at the Subantarctic and Polar Frontal Zones, respectively, in the Australian Sector of the Southern Ocean. Both sites were located along ~ 140 degrees E: station 47 degrees S was set on the abyssal plain of the central SAZ whereas station 54 degrees S was placed on a bathymetric high of the Southeast Indian Ridge in the PFZ. The data sets contain diatom species and biogeochemical flux data measured at 1000 m at the 47 degrees S site between 1999-2001 and at 800 m at the 54 degrees S site during six selected years between 1997-2007. All traps were MacLane Parflux sediment traps: conical in shape with a 0.5 m2 opening area and equipped with a carousel of 13 or 21 sampling cups. Shortest intervals corresponded with the austral summer and autumn ranging typically between 4.25 and 10 days, whereas the longest intervals were 60 days and corresponded with winter. Total fluxes of particulates at both traps were highly seasonal, with maxima registered during the austral spring and summer and very low fluxes during winter. Seasonality was more pronounced in the 54 degrees S site. Biogenic silica (SiO2) was the dominant bulk component in the PFZ while carbonate (CaCO3) dominated the particle fluxes at the SAZ. POC export was relatively similar between sites despite significant differences in the total diatom flux. Diatom frustules from 94 taxa were identified over the entire experiment. The dominant species of the diatom assemblage was Fragilariopsis kerguelensis at both sites, representing 43% and 59% of the integrated diatom assemblage at the 47 degrees S and 54 degrees S sites, respectively. Secondary contributors to the diatom assemblage at the 47 degrees S were Azpeitia tabularis, Thalassiosira sp. 1, Nitzschia bicapitata, resting spores of Chaetoceros spp., Thalassiosira oestrupii var. oestrupii, Hemidiscus cuneiformis and Roperia tesselata. Subordinate contributions to the diatom assemblage correspond to Pseudo-nitzschia lineola cf. lineola, Pseudo-nitzschia heimii, Thalassiosira gracilis group and Fragilariopsis pseudonana, Fragilariopsis rhombica and Thalassiosira lentiginosa. Data available: two excel files containing sampling dates and depths, raw counts, relative abundance and fluxes (valves m-2 d-1) of the diatom species, and biogenic particle fluxes measured at 1000 m and 800 m depth at the 47 degrees S and 54 degrees S sites, respectively. Each file contains four spreadsheets: raw diatom valve counts, relative abundance of diatom species and valve flux of diatom species and biogenic particle composition and fluxes. Detailed information of the column headings is provided below. Cup - Cup (=sample) number Depth - vertical location of the sediment trap in meters below the surface Mid-point date - Mid date of the sampling interval Length (days) - number of days the cup was open Girdle bands instead of valves were counted for Dactyliosolen antarcticus Castracane. Therefore, D. antarcticus girdles counts were not included in relative abundance calculations. Dates of data collection: 47 degrees S site: July 1999 - October 2001 (two-year record) 54 degrees S site: September 1997 - February 1998, July 1999 - August 2000, November 2002 - October 2004 and December 2005 - October 2007 (six-year record). |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth |
title_short |
Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth |
title_full |
Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth |
title_fullStr |
Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth |
title_full_unstemmed |
Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth |
title_sort |
diatom species and biogenic particle fluxes in the australian sector of the subantarctic and polar frontal zones at ~ 1 km depth |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/diatom-species-biogenic-km-depth/687139 https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux_subantarctic http://data.aad.gov.au/eds/4072/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=4078 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2256 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1156 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4078_diatoms_biogenic_flux_subantarctic |
op_coverage |
Spatial: northlimit=-46.76; southlimit=-46.76; westlimit=142.06; eastLimit=142.06 Spatial: northlimit=-53.75; southlimit=-53.75; westlimit=141.75; eastLimit=141.75 Temporal: From 1999-07-01 to 2001-10-31 |
long_lat |
ENVELOPE(110.000,110.000,-50.000,-50.000) ENVELOPE(142.06,142.06,-46.76,-46.76) ENVELOPE(141.75,141.75,-53.75,-53.75) |
geographic |
Austral Indian Southeast Indian Ridge Southern Ocean |
geographic_facet |
Austral Indian Southeast Indian Ridge Southern Ocean |
genre |
Antarc* antarcticus aurora australis Southern Ocean |
genre_facet |
Antarc* antarcticus aurora australis Southern Ocean |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/diatom-species-biogenic-km-depth/687139 5e8b8a9d-7c38-4e03-bc96-669bb0083f5c https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux_subantarctic http://data.aad.gov.au/eds/4072/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=4078 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2256 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1156 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4078_diatoms_biogenic_flux_subantarctic |
_version_ |
1766245721728614400 |
spelling |
ftands:oai:ands.org.au::687139 2023-05-15T13:46:56+02:00 Diatom species and biogenic particle fluxes in the Australian sector of the Subantarctic and Polar Frontal Zones at ~ 1 km depth AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-46.76; southlimit=-46.76; westlimit=142.06; eastLimit=142.06 Spatial: northlimit=-53.75; southlimit=-53.75; westlimit=141.75; eastLimit=141.75 Temporal: From 1999-07-01 to 2001-10-31 https://researchdata.ands.org.au/diatom-species-biogenic-km-depth/687139 https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux_subantarctic http://data.aad.gov.au/eds/4072/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=4078 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2256 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1156 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4078_diatoms_biogenic_flux_subantarctic unknown Australian Ocean Data Network https://researchdata.ands.org.au/diatom-species-biogenic-km-depth/687139 5e8b8a9d-7c38-4e03-bc96-669bb0083f5c https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux_subantarctic http://data.aad.gov.au/eds/4072/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=4078 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2256 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1156 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4078_diatoms_biogenic_flux_subantarctic https://data.aad.gov.au biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PLANTS MICROALGAE BIOGENIC SEDIMENTS MARINE SEDIMENTS Particle Flux SHIPS R/V AA > R/V Aurora Australis AMD AMD/AU CEOS ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR dataset ftands 2020-01-05T21:08:16Z Some large and/or entangled frustules of some large diatom taxa, such as Thalassiothrix, could have been be retained in the 1 mm screen mesh, and therefore, underrepresented in this study. Diatom and biogenic particle fluxes were investigated over a two-year and six-year periods at the Subantarctic and Polar Frontal Zones, respectively, in the Australian Sector of the Southern Ocean. Both sites were located along ~ 140 degrees E: station 47 degrees S was set on the abyssal plain of the central SAZ whereas station 54 degrees S was placed on a bathymetric high of the Southeast Indian Ridge in the PFZ. The data sets contain diatom species and biogeochemical flux data measured at 1000 m at the 47 degrees S site between 1999-2001 and at 800 m at the 54 degrees S site during six selected years between 1997-2007. All traps were MacLane Parflux sediment traps: conical in shape with a 0.5 m2 opening area and equipped with a carousel of 13 or 21 sampling cups. Shortest intervals corresponded with the austral summer and autumn ranging typically between 4.25 and 10 days, whereas the longest intervals were 60 days and corresponded with winter. Total fluxes of particulates at both traps were highly seasonal, with maxima registered during the austral spring and summer and very low fluxes during winter. Seasonality was more pronounced in the 54 degrees S site. Biogenic silica (SiO2) was the dominant bulk component in the PFZ while carbonate (CaCO3) dominated the particle fluxes at the SAZ. POC export was relatively similar between sites despite significant differences in the total diatom flux. Diatom frustules from 94 taxa were identified over the entire experiment. The dominant species of the diatom assemblage was Fragilariopsis kerguelensis at both sites, representing 43% and 59% of the integrated diatom assemblage at the 47 degrees S and 54 degrees S sites, respectively. Secondary contributors to the diatom assemblage at the 47 degrees S were Azpeitia tabularis, Thalassiosira sp. 1, Nitzschia bicapitata, resting spores of Chaetoceros spp., Thalassiosira oestrupii var. oestrupii, Hemidiscus cuneiformis and Roperia tesselata. Subordinate contributions to the diatom assemblage correspond to Pseudo-nitzschia lineola cf. lineola, Pseudo-nitzschia heimii, Thalassiosira gracilis group and Fragilariopsis pseudonana, Fragilariopsis rhombica and Thalassiosira lentiginosa. Data available: two excel files containing sampling dates and depths, raw counts, relative abundance and fluxes (valves m-2 d-1) of the diatom species, and biogenic particle fluxes measured at 1000 m and 800 m depth at the 47 degrees S and 54 degrees S sites, respectively. Each file contains four spreadsheets: raw diatom valve counts, relative abundance of diatom species and valve flux of diatom species and biogenic particle composition and fluxes. Detailed information of the column headings is provided below. Cup - Cup (=sample) number Depth - vertical location of the sediment trap in meters below the surface Mid-point date - Mid date of the sampling interval Length (days) - number of days the cup was open Girdle bands instead of valves were counted for Dactyliosolen antarcticus Castracane. Therefore, D. antarcticus girdles counts were not included in relative abundance calculations. Dates of data collection: 47 degrees S site: July 1999 - October 2001 (two-year record) 54 degrees S site: September 1997 - February 1998, July 1999 - August 2000, November 2002 - October 2004 and December 2005 - October 2007 (six-year record). Dataset Antarc* antarcticus aurora australis Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Austral Indian Southeast Indian Ridge ENVELOPE(110.000,110.000,-50.000,-50.000) Southern Ocean ENVELOPE(142.06,142.06,-46.76,-46.76) ENVELOPE(141.75,141.75,-53.75,-53.75) |