Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone
In the Southern Ocean, large-scale phytoplankton blooms occur in open water and the sea-ice zone (SIZ). These blooms have a range of fates including physical advection, downward carbon export, or grazing. Here, we determine the magnitude, timing and spatial trends of the biogeochemical (export) and...
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ftunivtasmania:oai:eprints.utas.edu.au:46614 2023-05-15T13:43:28+02:00 Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone Moreau, S Boyd, PW Strutton, PG 2020 application/pdf https://eprints.utas.edu.au/46614/ https://eprints.utas.edu.au/46614/1/150345%20-%20Remote%20assessment%20of%20the%20fate%20of%20phytoplankton.pdf en eng Nature Publishing Group https://eprints.utas.edu.au/46614/1/150345%20-%20Remote%20assessment%20of%20the%20fate%20of%20phytoplankton.pdf Moreau, S orcid:0000-0001-9446-812X , Boyd, PW orcid:0000-0001-7850-1911 and Strutton, PG orcid:0000-0002-2395-9471 2020 , 'Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone' , Nature Communications, vol. 11, no. 1 , pp. 1-9 , doi:10.1038/s41467-020-16931-0 <http://dx.doi.org/10.1038/s41467-020-16931-0>. Antarctic phytoplankton blooms Article PeerReviewed 2020 ftunivtasmania https://doi.org/10.1038/s41467-020-16931-0 2022-07-25T22:16:45Z In the Southern Ocean, large-scale phytoplankton blooms occur in open water and the sea-ice zone (SIZ). These blooms have a range of fates including physical advection, downward carbon export, or grazing. Here, we determine the magnitude, timing and spatial trends of the biogeochemical (export) and ecological (foodwebs) fates of phytoplankton, based on seven BGC-Argo floats spanning three years across the SIZ. We calculate loss terms using the production of chlorophyll—based on nitrate depletion—compared with measured chlorophyll. Export losses are estimated using conspicuous chlorophyll pulses at depth. By subtracting export losses, we calculate grazing-mediated losses. Herbivory accounts for ~90% of the annually-averaged losses (169 mg C m−2 d−1), and phytodetritus POC export comprises ~10%. Furthermore, export and grazing losses each exhibit distinctive seasonality captured by all floats spanning 60°S to 69°S. These similar trends reveal widespread patterns in phytoplankton fate throughout the Southern Ocean SIZ. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Nature Communications 11 1 |
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Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctic phytoplankton blooms |
spellingShingle |
Antarctic phytoplankton blooms Moreau, S Boyd, PW Strutton, PG Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone |
topic_facet |
Antarctic phytoplankton blooms |
description |
In the Southern Ocean, large-scale phytoplankton blooms occur in open water and the sea-ice zone (SIZ). These blooms have a range of fates including physical advection, downward carbon export, or grazing. Here, we determine the magnitude, timing and spatial trends of the biogeochemical (export) and ecological (foodwebs) fates of phytoplankton, based on seven BGC-Argo floats spanning three years across the SIZ. We calculate loss terms using the production of chlorophyll—based on nitrate depletion—compared with measured chlorophyll. Export losses are estimated using conspicuous chlorophyll pulses at depth. By subtracting export losses, we calculate grazing-mediated losses. Herbivory accounts for ~90% of the annually-averaged losses (169 mg C m−2 d−1), and phytodetritus POC export comprises ~10%. Furthermore, export and grazing losses each exhibit distinctive seasonality captured by all floats spanning 60°S to 69°S. These similar trends reveal widespread patterns in phytoplankton fate throughout the Southern Ocean SIZ. |
format |
Article in Journal/Newspaper |
author |
Moreau, S Boyd, PW Strutton, PG |
author_facet |
Moreau, S Boyd, PW Strutton, PG |
author_sort |
Moreau, S |
title |
Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone |
title_short |
Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone |
title_full |
Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone |
title_fullStr |
Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone |
title_full_unstemmed |
Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone |
title_sort |
remote assessment of the fate of phytoplankton in the southern ocean sea-ice zone |
publisher |
Nature Publishing Group |
publishDate |
2020 |
url |
https://eprints.utas.edu.au/46614/ https://eprints.utas.edu.au/46614/1/150345%20-%20Remote%20assessment%20of%20the%20fate%20of%20phytoplankton.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
https://eprints.utas.edu.au/46614/1/150345%20-%20Remote%20assessment%20of%20the%20fate%20of%20phytoplankton.pdf Moreau, S orcid:0000-0001-9446-812X , Boyd, PW orcid:0000-0001-7850-1911 and Strutton, PG orcid:0000-0002-2395-9471 2020 , 'Remote assessment of the fate of phytoplankton in the Southern Ocean sea-ice zone' , Nature Communications, vol. 11, no. 1 , pp. 1-9 , doi:10.1038/s41467-020-16931-0 <http://dx.doi.org/10.1038/s41467-020-16931-0>. |
op_doi |
https://doi.org/10.1038/s41467-020-16931-0 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766189288352907264 |