Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone
Diatom and biogenic particle fluxes were investigated over a one-year period (2001-02) at the southern Antarctic Zone in the Australian Sector of the Southern Ocean. Two vertically moored sediment traps were deployed at 60 degrees 44.43'S 139 degrees 53.97' E at 2000 and 3800 m below sea-l...
Other Authors: | , , , , , , , , , , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
Australian Antarctic Data Centre
|
Subjects: | |
Online Access: | https://researchdata.ands.org.au/diatom-species-biogenic-antarctic-zone/699024 https://doi.org/10.4225/15/54656F37E04D6 https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux http://nla.gov.au/nla.party-617536 |
id |
ftands:oai:ands.org.au::699024 |
---|---|
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 Biogenic Particle Flux SHIPS R/V AA > R/V Aurora Australis CONTINENT > ANTARCTICA OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PLANTS MICROALGAE BIOGENIC SEDIMENTS MARINE SEDIMENTS Biogenic Particle Flux SHIPS R/V AA > R/V Aurora Australis CONTINENT > ANTARCTICA OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone |
topic_facet |
biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PLANTS MICROALGAE BIOGENIC SEDIMENTS MARINE SEDIMENTS Biogenic Particle Flux SHIPS R/V AA > R/V Aurora Australis CONTINENT > ANTARCTICA OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
description |
Diatom and biogenic particle fluxes were investigated over a one-year period (2001-02) at the southern Antarctic Zone in the Australian Sector of the Southern Ocean. Two vertically moored sediment traps were deployed at 60 degrees 44.43'S 139 degrees 53.97' E at 2000 and 3800 m below sea-level. In these data sets we present the results on the temporal and vertical variability of total diatom flux, species composition and biogenic particle fluxes during a year. A detailed description of the field experiment, sample processing and counting methods can be found in Rigual-Hernandez et al. (2015). Total fluxes of particulates at both traps were highly seasonal, with maxima registered during the austral summer (up to 1151 mg m-2 d-1 at 2000 m and 1157 mg m-2 d-1 at 3700 m) and almost negligible fluxes during winter (up to 42 mg m-2 d-1 at 2000 m and below detection limits at 3700 m). Particulate fluxes were slightly higher at 2000 m than at 3700 m (deployment average = 261 and 216 mg m-2 d-1, respectively). Biogenic silica (SiO2) was the dominant bulk component, regardless of the sampling period or depth (deployment average = 76% at 2000 and 78% at 3700 m). Highest relative contribution of opal was registered from the end of summer through early-autumn at both depths. Secondary contributors were carbonate (CaCO3) (7% at 2000 m and 9% at 3700 m) and particulate organic carbon (POC) (1.4% at 2000 m and 1.2% at 3700 m). The relative concentration of carbonate and POC was at its highest in austral spring and summer. Diatom frustules from 61 taxa were identified over the entire experiment. The dominant species of the diatom assemblage was Fragilariopsis kerguelensis with a mean flux between 53 x 106 and 60 x 106 valves m-2 day-1 at 2000 m (annualized mean and deployment average, respectively). Secondary contributors to the diatom assemblage at 2000 and 3700 m were Thalassiosira lentiginosa, Thalassiosira gracilis var. gracilis, Fragilariopsis separanda, Fragilariopsis pseudonana, Fragilariopsis rhombica, Fragilariopsis curta and Azpeitia tabularis. 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 found at 2000 m and 3700 m depth. 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 |
author2 |
RIGUAL-HERNANDEZ, ANDRES S. (hasPrincipalInvestigator) RIGUAL-HERNANDEZ, ANDRES S. (processor) ARMAND, LEANNE KAY (hasPrincipalInvestigator) ARMAND, LEANNE KAY (processor) TRULL, THOMAS WILLIAM (hasPrincipalInvestigator) TRULL, THOMAS WILLIAM (processor) BRAY, STEPHEN GILBERT (hasPrincipalInvestigator) BRAY, STEPHEN GILBERT (processor) BALLEGEER, ANNE-MARIE (hasPrincipalInvestigator) BALLEGEER, ANNE-MARIE (processor) Australian Antarctic Data Centre (publisher) |
format |
Dataset |
title |
Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone |
title_short |
Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone |
title_full |
Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone |
title_fullStr |
Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone |
title_full_unstemmed |
Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone |
title_sort |
diatom species and biogenic particle fluxes in the australian sector of the southern antarctic zone |
publisher |
Australian Antarctic Data Centre |
url |
https://researchdata.ands.org.au/diatom-species-biogenic-antarctic-zone/699024 https://doi.org/10.4225/15/54656F37E04D6 https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux http://nla.gov.au/nla.party-617536 |
op_coverage |
Spatial: northlimit=-61.74; southlimit=-61.75; westlimit=139.89; eastLimit=139.9; projection=WGS84 Temporal: From 2001-11-30 to 2002-09-29 |
long_lat |
ENVELOPE(-62.167,-62.167,-74.500,-74.500) ENVELOPE(139.89,139.9,-61.74,-61.75) |
geographic |
Antarctic Austral Hernandez Southern Ocean |
geographic_facet |
Antarctic Austral Hernandez Southern Ocean |
genre |
Antarc* Antarctic Antarctica antarcticus aurora australis Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica antarcticus aurora australis Southern Ocean |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.ands.org.au/diatom-species-biogenic-antarctic-zone/699024 76f6636a-b400-4773-8ea3-d5fe0b8c52ce doi:10.4225/15/54656F37E04D6 AAS_4078_diatoms_biogenic_flux https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux http://nla.gov.au/nla.party-617536 |
op_doi |
https://doi.org/10.4225/15/54656F37E04D6 |
_version_ |
1766245795011493888 |
spelling |
ftands:oai:ands.org.au::699024 2023-05-15T13:46:57+02:00 Diatom species and biogenic particle fluxes in the Australian sector of the southern Antarctic Zone RIGUAL-HERNANDEZ, ANDRES S. (hasPrincipalInvestigator) RIGUAL-HERNANDEZ, ANDRES S. (processor) ARMAND, LEANNE KAY (hasPrincipalInvestigator) ARMAND, LEANNE KAY (processor) TRULL, THOMAS WILLIAM (hasPrincipalInvestigator) TRULL, THOMAS WILLIAM (processor) BRAY, STEPHEN GILBERT (hasPrincipalInvestigator) BRAY, STEPHEN GILBERT (processor) BALLEGEER, ANNE-MARIE (hasPrincipalInvestigator) BALLEGEER, ANNE-MARIE (processor) Australian Antarctic Data Centre (publisher) Spatial: northlimit=-61.74; southlimit=-61.75; westlimit=139.89; eastLimit=139.9; projection=WGS84 Temporal: From 2001-11-30 to 2002-09-29 https://researchdata.ands.org.au/diatom-species-biogenic-antarctic-zone/699024 https://doi.org/10.4225/15/54656F37E04D6 https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux http://nla.gov.au/nla.party-617536 unknown Australian Antarctic Data Centre https://researchdata.ands.org.au/diatom-species-biogenic-antarctic-zone/699024 76f6636a-b400-4773-8ea3-d5fe0b8c52ce doi:10.4225/15/54656F37E04D6 AAS_4078_diatoms_biogenic_flux https://data.aad.gov.au/metadata/records/AAS_4078_diatoms_biogenic_flux http://nla.gov.au/nla.party-617536 Australian Antarctic Data Centre biota oceans DIATOMS EARTH SCIENCE BIOLOGICAL CLASSIFICATION PLANTS MICROALGAE BIOGENIC SEDIMENTS MARINE SEDIMENTS Biogenic Particle Flux SHIPS R/V AA > R/V Aurora Australis CONTINENT > ANTARCTICA OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR dataset ftands https://doi.org/10.4225/15/54656F37E04D6 2020-01-05T21:15:41Z Diatom and biogenic particle fluxes were investigated over a one-year period (2001-02) at the southern Antarctic Zone in the Australian Sector of the Southern Ocean. Two vertically moored sediment traps were deployed at 60 degrees 44.43'S 139 degrees 53.97' E at 2000 and 3800 m below sea-level. In these data sets we present the results on the temporal and vertical variability of total diatom flux, species composition and biogenic particle fluxes during a year. A detailed description of the field experiment, sample processing and counting methods can be found in Rigual-Hernandez et al. (2015). Total fluxes of particulates at both traps were highly seasonal, with maxima registered during the austral summer (up to 1151 mg m-2 d-1 at 2000 m and 1157 mg m-2 d-1 at 3700 m) and almost negligible fluxes during winter (up to 42 mg m-2 d-1 at 2000 m and below detection limits at 3700 m). Particulate fluxes were slightly higher at 2000 m than at 3700 m (deployment average = 261 and 216 mg m-2 d-1, respectively). Biogenic silica (SiO2) was the dominant bulk component, regardless of the sampling period or depth (deployment average = 76% at 2000 and 78% at 3700 m). Highest relative contribution of opal was registered from the end of summer through early-autumn at both depths. Secondary contributors were carbonate (CaCO3) (7% at 2000 m and 9% at 3700 m) and particulate organic carbon (POC) (1.4% at 2000 m and 1.2% at 3700 m). The relative concentration of carbonate and POC was at its highest in austral spring and summer. Diatom frustules from 61 taxa were identified over the entire experiment. The dominant species of the diatom assemblage was Fragilariopsis kerguelensis with a mean flux between 53 x 106 and 60 x 106 valves m-2 day-1 at 2000 m (annualized mean and deployment average, respectively). Secondary contributors to the diatom assemblage at 2000 and 3700 m were Thalassiosira lentiginosa, Thalassiosira gracilis var. gracilis, Fragilariopsis separanda, Fragilariopsis pseudonana, Fragilariopsis rhombica, Fragilariopsis curta and Azpeitia tabularis. 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 found at 2000 m and 3700 m depth. 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 Dataset Antarc* Antarctic Antarctica antarcticus aurora australis Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Austral Hernandez ENVELOPE(-62.167,-62.167,-74.500,-74.500) Southern Ocean ENVELOPE(139.89,139.9,-61.74,-61.75) |