Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom
10 pages, 7 figures, 1 table, supplementary material https://doi.org/10.1016/j.pocean.2018.10.008 In Antarctica, summer is a time of extreme environmental shifts resulting in large coastal phytoplankton blooms fueling the food web. Despite the importance of the microbial loop in remineralizing bioma...
Published in: | Progress in Oceanography |
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Online Access: | http://hdl.handle.net/10261/175088 https://doi.org/10.1016/j.pocean.2018.10.008 https://doi.org/10.13039/100000001 |
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ftcsic:oai:digital.csic.es:10261/175088 2024-02-11T09:55:18+01:00 Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom Swalethorp, Rasmus Dinasquet, Julie Logares, Ramiro Bertilsson, Stefan Kjellerup, Sanne Krabberød, Anders K. Moksnes, Per-Olav Nielsen, Torkel G. Riemann, Lasse National Science Foundation (US) Swedish Research Council 2019-01 http://hdl.handle.net/10261/175088 https://doi.org/10.1016/j.pocean.2018.10.008 https://doi.org/10.13039/100000001 unknown Elsevier https://doi.org/10.1016/j.pocean.2018.10.008 Sí doi:10.1016/j.pocean.2018.10.008 issn: 0079-6611 Progress in Oceanography 170: 1-10 (2019) http://hdl.handle.net/10261/175088 http://dx.doi.org/10.13039/100000001 open Net Primary Production NPP Growth rates Ciliates Deep Fluorescence Maximum DFM Operational Taxonomic Unit OTU Heterotrophic nanoflagellates HNF SO Amundsen Sea Polynya ASP Gymnodinium spp Antarctica Dinoflagellate Southern Ocean artículo http://purl.org/coar/resource_type/c_6501 2019 ftcsic https://doi.org/10.1016/j.pocean.2018.10.00810.13039/100000001 2024-01-16T10:35:32Z 10 pages, 7 figures, 1 table, supplementary material https://doi.org/10.1016/j.pocean.2018.10.008 In Antarctica, summer is a time of extreme environmental shifts resulting in large coastal phytoplankton blooms fueling the food web. Despite the importance of the microbial loop in remineralizing biomass from primary production, studies of how microzooplankton communities respond to such blooms in the Southern Ocean are rather scarce. Microzooplankton (ciliate and dinoflagellate) communities were investigated combining microscopy and 18S rRNA sequencing analyses in the Amundsen Sea Polynya during an extensive summer bloom of Phaeocystis antarctica. The succession of microzooplankton was further assessed during a 15-day induced bloom microcosm experiment. Dinoflagellates accounted for up to 59 % of the microzooplankton biomass in situ with Gymnodinium spp., Protoperidium spp. and Gyrodinium spp. constituting 89 % of the dinoflagellate biomass. Strobilidium spp., Strombidium spp. and tintinids represented 90 % of the ciliate biomass. Gymnodinium, Gyrodinium and tintinnids are known grazers of Phaeocystis, suggesting that this prymnesiophyte selected for the key microzooplankton taxa. Availability of other potential prey, such as diatoms, heterotrophic nanoflagellates and bacteria, also correlated to changes in microzooplankton community structure. Overall, both heterotrophy and mixotrophy appeared to be key trophic strategies of the dominant microzooplankton observed, suggesting that they influence carbon flow in the microbial food web through top-down control on the phytoplankton community This work was supported by the Swedish Research Council [grant 2008-6430] to S. Bertilsson and L. Riemann and [grant 824-2008-6429] to P.-O. Moksnes and J. Havenhand, and by the US National Science Foundation through the ASPIRE project [NSF OPP-0839069] to P. Yager Peer Reviewed Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Southern Ocean Digital.CSIC (Spanish National Research Council) Amundsen Sea Southern Ocean Progress in Oceanography 170 1 10 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Net Primary Production NPP Growth rates Ciliates Deep Fluorescence Maximum DFM Operational Taxonomic Unit OTU Heterotrophic nanoflagellates HNF SO Amundsen Sea Polynya ASP Gymnodinium spp Antarctica Dinoflagellate Southern Ocean |
spellingShingle |
Net Primary Production NPP Growth rates Ciliates Deep Fluorescence Maximum DFM Operational Taxonomic Unit OTU Heterotrophic nanoflagellates HNF SO Amundsen Sea Polynya ASP Gymnodinium spp Antarctica Dinoflagellate Southern Ocean Swalethorp, Rasmus Dinasquet, Julie Logares, Ramiro Bertilsson, Stefan Kjellerup, Sanne Krabberød, Anders K. Moksnes, Per-Olav Nielsen, Torkel G. Riemann, Lasse Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom |
topic_facet |
Net Primary Production NPP Growth rates Ciliates Deep Fluorescence Maximum DFM Operational Taxonomic Unit OTU Heterotrophic nanoflagellates HNF SO Amundsen Sea Polynya ASP Gymnodinium spp Antarctica Dinoflagellate Southern Ocean |
description |
10 pages, 7 figures, 1 table, supplementary material https://doi.org/10.1016/j.pocean.2018.10.008 In Antarctica, summer is a time of extreme environmental shifts resulting in large coastal phytoplankton blooms fueling the food web. Despite the importance of the microbial loop in remineralizing biomass from primary production, studies of how microzooplankton communities respond to such blooms in the Southern Ocean are rather scarce. Microzooplankton (ciliate and dinoflagellate) communities were investigated combining microscopy and 18S rRNA sequencing analyses in the Amundsen Sea Polynya during an extensive summer bloom of Phaeocystis antarctica. The succession of microzooplankton was further assessed during a 15-day induced bloom microcosm experiment. Dinoflagellates accounted for up to 59 % of the microzooplankton biomass in situ with Gymnodinium spp., Protoperidium spp. and Gyrodinium spp. constituting 89 % of the dinoflagellate biomass. Strobilidium spp., Strombidium spp. and tintinids represented 90 % of the ciliate biomass. Gymnodinium, Gyrodinium and tintinnids are known grazers of Phaeocystis, suggesting that this prymnesiophyte selected for the key microzooplankton taxa. Availability of other potential prey, such as diatoms, heterotrophic nanoflagellates and bacteria, also correlated to changes in microzooplankton community structure. Overall, both heterotrophy and mixotrophy appeared to be key trophic strategies of the dominant microzooplankton observed, suggesting that they influence carbon flow in the microbial food web through top-down control on the phytoplankton community This work was supported by the Swedish Research Council [grant 2008-6430] to S. Bertilsson and L. Riemann and [grant 824-2008-6429] to P.-O. Moksnes and J. Havenhand, and by the US National Science Foundation through the ASPIRE project [NSF OPP-0839069] to P. Yager Peer Reviewed |
author2 |
National Science Foundation (US) Swedish Research Council |
format |
Article in Journal/Newspaper |
author |
Swalethorp, Rasmus Dinasquet, Julie Logares, Ramiro Bertilsson, Stefan Kjellerup, Sanne Krabberød, Anders K. Moksnes, Per-Olav Nielsen, Torkel G. Riemann, Lasse |
author_facet |
Swalethorp, Rasmus Dinasquet, Julie Logares, Ramiro Bertilsson, Stefan Kjellerup, Sanne Krabberød, Anders K. Moksnes, Per-Olav Nielsen, Torkel G. Riemann, Lasse |
author_sort |
Swalethorp, Rasmus |
title |
Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom |
title_short |
Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom |
title_full |
Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom |
title_fullStr |
Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom |
title_full_unstemmed |
Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom |
title_sort |
microzooplankton distribution in the amundsen sea polynya (antarctica) during an extensive phaeocystis antarctica bloom |
publisher |
Elsevier |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/175088 https://doi.org/10.1016/j.pocean.2018.10.008 https://doi.org/10.13039/100000001 |
geographic |
Amundsen Sea Southern Ocean |
geographic_facet |
Amundsen Sea Southern Ocean |
genre |
Amundsen Sea Antarc* Antarctica Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctica Southern Ocean |
op_relation |
https://doi.org/10.1016/j.pocean.2018.10.008 Sí doi:10.1016/j.pocean.2018.10.008 issn: 0079-6611 Progress in Oceanography 170: 1-10 (2019) http://hdl.handle.net/10261/175088 http://dx.doi.org/10.13039/100000001 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.pocean.2018.10.00810.13039/100000001 |
container_title |
Progress in Oceanography |
container_volume |
170 |
container_start_page |
1 |
op_container_end_page |
10 |
_version_ |
1790594893574307840 |