Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean)
The spatial and temporal community composition of microzooplankton (dinoflagellates and ciliates) was assessed in the Kerguelen area (Southern Ocean) during the KEOPS2 cruise in early spring (October-November) 2011. This naturally iron-fertilized region was characterized by a complex mesoscale circu...
Published in: | FEMS Microbiology Ecology |
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Oxford Univ Press
2015
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ftarchimer:oai:archimer.ifremer.fr:46255 2023-05-15T18:24:48+02:00 Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) Christaki, Urania Georges, Clement Genitsaris, Savvas Monchy, Sebastien 2015-07 application/pdf https://archimer.ifremer.fr/doc/00351/46255/46080.pdf https://archimer.ifremer.fr/doc/00351/46255/46081.pdf https://archimer.ifremer.fr/doc/00351/46255/46082.pdf https://doi.org/10.1093/femsec/fiv068 https://archimer.ifremer.fr/doc/00351/46255/ eng eng Oxford Univ Press https://archimer.ifremer.fr/doc/00351/46255/46080.pdf https://archimer.ifremer.fr/doc/00351/46255/46081.pdf https://archimer.ifremer.fr/doc/00351/46255/46082.pdf doi:10.1093/femsec/fiv068 https://archimer.ifremer.fr/doc/00351/46255/ FEMS 2015. All rights reserved. info:eu-repo/semantics/openAccess restricted use Fems Microbiology Ecology (0168-6496) (Oxford Univ Press), 2015-07 , Vol. 91 , N. 7 , P. fiv068 (1-15) dinoflagellates ciliates natural iron fertilization Southern Ocean text Publication info:eu-repo/semantics/article 2015 ftarchimer https://doi.org/10.1093/femsec/fiv068 2021-09-23T20:28:47Z The spatial and temporal community composition of microzooplankton (dinoflagellates and ciliates) was assessed in the Kerguelen area (Southern Ocean) during the KEOPS2 cruise in early spring (October-November) 2011. This naturally iron-fertilized region was characterized by a complex mesoscale circulation resulting in a patchy distribution of phytoplankton blooms. Collectively, 97 morphospecies of dinoflagellates and ciliates belonging to 41 genera were identified by microscopy, and 202 Alveolata-related OTUs (operational taxonomical units) were retrieved with tag-pyrosequencing. Microscopy and pyrosequencing data were in accordance, in that diatom-consuming dinoflagellates were the most enhanced taxa in the blooms. Dinoflagellates also showed significant positive relationships with phytoplankton pigments, while no major differences were found in the ciliate abundances inside and outside the blooms. Cluster analysis showed clear differences in the phytoplankton and microzooplankton community structures between the iron-fertilized and HNLC (high nutrient low chlorophyll) waters, and between the blooms, concerning their location and the fertilization mechanisms. These results were combined with the rates of primary production and mesozooplankton consumption determined for the study area. The potential role of dinoflagellates and ciliates as phytoplankton consumers and as prey for mesozooplankton was then evaluated. Overall, heterotrophic dinoflagellates were probably the most important group of phytoplankton grazers, and a potential food source for copepods. Article in Journal/Newspaper Southern Ocean Copepods Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Kerguelen Southern Ocean FEMS Microbiology Ecology 91 7 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
dinoflagellates ciliates natural iron fertilization Southern Ocean |
spellingShingle |
dinoflagellates ciliates natural iron fertilization Southern Ocean Christaki, Urania Georges, Clement Genitsaris, Savvas Monchy, Sebastien Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
topic_facet |
dinoflagellates ciliates natural iron fertilization Southern Ocean |
description |
The spatial and temporal community composition of microzooplankton (dinoflagellates and ciliates) was assessed in the Kerguelen area (Southern Ocean) during the KEOPS2 cruise in early spring (October-November) 2011. This naturally iron-fertilized region was characterized by a complex mesoscale circulation resulting in a patchy distribution of phytoplankton blooms. Collectively, 97 morphospecies of dinoflagellates and ciliates belonging to 41 genera were identified by microscopy, and 202 Alveolata-related OTUs (operational taxonomical units) were retrieved with tag-pyrosequencing. Microscopy and pyrosequencing data were in accordance, in that diatom-consuming dinoflagellates were the most enhanced taxa in the blooms. Dinoflagellates also showed significant positive relationships with phytoplankton pigments, while no major differences were found in the ciliate abundances inside and outside the blooms. Cluster analysis showed clear differences in the phytoplankton and microzooplankton community structures between the iron-fertilized and HNLC (high nutrient low chlorophyll) waters, and between the blooms, concerning their location and the fertilization mechanisms. These results were combined with the rates of primary production and mesozooplankton consumption determined for the study area. The potential role of dinoflagellates and ciliates as phytoplankton consumers and as prey for mesozooplankton was then evaluated. Overall, heterotrophic dinoflagellates were probably the most important group of phytoplankton grazers, and a potential food source for copepods. |
format |
Article in Journal/Newspaper |
author |
Christaki, Urania Georges, Clement Genitsaris, Savvas Monchy, Sebastien |
author_facet |
Christaki, Urania Georges, Clement Genitsaris, Savvas Monchy, Sebastien |
author_sort |
Christaki, Urania |
title |
Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_short |
Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_full |
Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_fullStr |
Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_full_unstemmed |
Microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_sort |
microzooplankton community associated with phytoplankton blooms in the naturally iron-fertilized kerguelen area (southern ocean) |
publisher |
Oxford Univ Press |
publishDate |
2015 |
url |
https://archimer.ifremer.fr/doc/00351/46255/46080.pdf https://archimer.ifremer.fr/doc/00351/46255/46081.pdf https://archimer.ifremer.fr/doc/00351/46255/46082.pdf https://doi.org/10.1093/femsec/fiv068 https://archimer.ifremer.fr/doc/00351/46255/ |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean Copepods |
genre_facet |
Southern Ocean Copepods |
op_source |
Fems Microbiology Ecology (0168-6496) (Oxford Univ Press), 2015-07 , Vol. 91 , N. 7 , P. fiv068 (1-15) |
op_relation |
https://archimer.ifremer.fr/doc/00351/46255/46080.pdf https://archimer.ifremer.fr/doc/00351/46255/46081.pdf https://archimer.ifremer.fr/doc/00351/46255/46082.pdf doi:10.1093/femsec/fiv068 https://archimer.ifremer.fr/doc/00351/46255/ |
op_rights |
FEMS 2015. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1093/femsec/fiv068 |
container_title |
FEMS Microbiology Ecology |
container_volume |
91 |
container_issue |
7 |
_version_ |
1766205728810336256 |