Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data
Progress Code: completed Papers arising from phytoplankton experiments associated with the SAZ (Subantarctic Zone) project. This work was complete as part of ASAC (AAS) project 1156. Taken from the abstracts of the referenced papers: Subantarctic Southern Ocean surface waters in the austral summer a...
Other Authors: | , , , , , , , , , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
Australian Ocean Data Network
|
Subjects: | |
Online Access: | https://researchdata.edu.au/sub-antarctic-zone-phytoplankton-data/2819676 |
id |
ftands:oai:ands.org.au::2819676 |
---|---|
record_format |
openpolar |
spelling |
ftands:oai:ands.org.au::2819676 2024-09-15T17:42:20+00:00 Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Australian Antarctic Division (sponsor) CONNELL, DAVE J. (author) TRULL, THOMAS WILLIAM (collaborator) TRULL, THOMAS WILLIAM (hasPrincipalInvestigator) Trull, T. (originator) Spatial: westlimit=142.0; southlimit=-54.0; eastlimit=142.0; northlimit=-47.0 Temporal: From 1998-03-01 to 1998-03-31 https://researchdata.edu.au/sub-antarctic-zone-phytoplankton-data/2819676 unknown Australian Ocean Data Network https://researchdata.edu.au/sub-antarctic-zone-phytoplankton-data/2819676 ASAC_1156_Phytoplankton AU/AADC > Australian Antarctic Data Centre, Australia biota oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS OCEAN CIRCULATION > WATER MASSES OCEAN OPTICS > IRRADIANCE BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON BIOLOGICAL CLASSIFICATION > PROTISTS > Iron SAZ Growth silicic acid LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR dataset ftands 2024-08-06T01:58:58Z Progress Code: completed Papers arising from phytoplankton experiments associated with the SAZ (Subantarctic Zone) project. This work was complete as part of ASAC (AAS) project 1156. Taken from the abstracts of the referenced papers: Subantarctic Southern Ocean surface waters in the austral summer and autumn are characterised by high concentrations of nitrate and phosphate but low concentrations of dissolved iron (Fe, ~0.05 nM) and silicic acid (Si, less than 1 micro M). During the Subantarctic Zone AU9706 cruise in March 1998 we investigated the relative importance of Fe and Si in controlling phytoplankton growth and species composition at a station within the subantarctic water mass (46.8 degrees S, 142 degrees E) using shipboard bottle incubation experiments. Treatments included unamended controls; 1.9 nM added iron (+Fe); 9 micro M added silicic acid (+Si); and 1.9 nM added iron plus 9 micro M added silicic acid (+Fe+Si). We followed a detailed set of biological and biogeochemical parameters over 8 days. Fe added alone clearly increased community growth rates and nitrate drawdown and altered algal community composition relative to control treatments. Surprisingly, small, lightly silicified pennate diatoms grew when Fe was added either with or without Si, despite the extremely low ambient silicic acid concentrations. Pigment analyses suggest that lightly silicified chrysophytes (type 4 haptophytes) may have preferentially responded to Si added either with or without Fe. However, for many of the parameters measured the +Fe+Si treatments showed large increases relative to both the +Fe and +Si treatments. Our results suggest that iron is the proximate limiting nutrient for chlorophyll production, photosynthetic efficiency, nitrate drawdown, and diatom growth, but that Si also exerts considerable control over algal growth response, suggesting that both Fe and Si play important roles in structuring the subantarctic phytoplankton community. The influence of irradiance and iron (Fe) supply on phytoplankton ... Dataset Antarc* Antarctic aurora australis Southern Ocean Research Data Australia (Australian National Data Service - ANDS) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS OCEAN CIRCULATION > WATER MASSES OCEAN OPTICS > IRRADIANCE BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON BIOLOGICAL CLASSIFICATION > PROTISTS > Iron SAZ Growth silicic acid LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS OCEAN CIRCULATION > WATER MASSES OCEAN OPTICS > IRRADIANCE BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON BIOLOGICAL CLASSIFICATION > PROTISTS > Iron SAZ Growth silicic acid LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data |
topic_facet |
biota oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS OCEAN CIRCULATION > WATER MASSES OCEAN OPTICS > IRRADIANCE BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON BIOLOGICAL CLASSIFICATION > PROTISTS > Iron SAZ Growth silicic acid LABORATORY R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
description |
Progress Code: completed Papers arising from phytoplankton experiments associated with the SAZ (Subantarctic Zone) project. This work was complete as part of ASAC (AAS) project 1156. Taken from the abstracts of the referenced papers: Subantarctic Southern Ocean surface waters in the austral summer and autumn are characterised by high concentrations of nitrate and phosphate but low concentrations of dissolved iron (Fe, ~0.05 nM) and silicic acid (Si, less than 1 micro M). During the Subantarctic Zone AU9706 cruise in March 1998 we investigated the relative importance of Fe and Si in controlling phytoplankton growth and species composition at a station within the subantarctic water mass (46.8 degrees S, 142 degrees E) using shipboard bottle incubation experiments. Treatments included unamended controls; 1.9 nM added iron (+Fe); 9 micro M added silicic acid (+Si); and 1.9 nM added iron plus 9 micro M added silicic acid (+Fe+Si). We followed a detailed set of biological and biogeochemical parameters over 8 days. Fe added alone clearly increased community growth rates and nitrate drawdown and altered algal community composition relative to control treatments. Surprisingly, small, lightly silicified pennate diatoms grew when Fe was added either with or without Si, despite the extremely low ambient silicic acid concentrations. Pigment analyses suggest that lightly silicified chrysophytes (type 4 haptophytes) may have preferentially responded to Si added either with or without Fe. However, for many of the parameters measured the +Fe+Si treatments showed large increases relative to both the +Fe and +Si treatments. Our results suggest that iron is the proximate limiting nutrient for chlorophyll production, photosynthetic efficiency, nitrate drawdown, and diatom growth, but that Si also exerts considerable control over algal growth response, suggesting that both Fe and Si play important roles in structuring the subantarctic phytoplankton community. The influence of irradiance and iron (Fe) supply on phytoplankton ... |
author2 |
AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Australian Antarctic Division (sponsor) CONNELL, DAVE J. (author) TRULL, THOMAS WILLIAM (collaborator) TRULL, THOMAS WILLIAM (hasPrincipalInvestigator) Trull, T. (originator) |
format |
Dataset |
title |
Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data |
title_short |
Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data |
title_full |
Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data |
title_fullStr |
Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data |
title_full_unstemmed |
Sub-Antarctic zone mooring study of interannual variability in particulate carbon export - Phytoplankton Data |
title_sort |
sub-antarctic zone mooring study of interannual variability in particulate carbon export - phytoplankton data |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/sub-antarctic-zone-phytoplankton-data/2819676 |
op_coverage |
Spatial: westlimit=142.0; southlimit=-54.0; eastlimit=142.0; northlimit=-47.0 Temporal: From 1998-03-01 to 1998-03-31 |
genre |
Antarc* Antarctic aurora australis Southern Ocean |
genre_facet |
Antarc* Antarctic aurora australis Southern Ocean |
op_source |
AU/AADC > Australian Antarctic Data Centre, Australia |
op_relation |
https://researchdata.edu.au/sub-antarctic-zone-phytoplankton-data/2819676 ASAC_1156_Phytoplankton |
_version_ |
1810488871264190464 |