Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current
Ocean iron fertilization experiments enable the quantitative study of processes shaping the structure and functioning of pelagic ecosystems following perturbation under in situ conditions. EIFEX was conducted within a stationary eddy adjacent to the Antarctic Polar Front over 38 days in February/Mar...
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Online Access: | https://doi.org/10.1093/plankt/fbu068 https://archimer.ifremer.fr/doc/00290/40091/39174.pdf https://archimer.ifremer.fr/doc/00290/40091/39177.pdf https://archimer.ifremer.fr/doc/00290/40091/39178.docx |
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fttriple:oai:gotriple.eu:10670/1.wgy77s 2023-05-15T13:53:03+02:00 Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current Assmy, Philipp Cisewski, Boris Henjes, Joachim Klaas, Christine Montresor, Marina Smetacek, Victor https://doi.org/10.1093/plankt/fbu068 https://archimer.ifremer.fr/doc/00290/40091/39174.pdf https://archimer.ifremer.fr/doc/00290/40091/39177.pdf https://archimer.ifremer.fr/doc/00290/40091/39178.docx en eng Oxford Univ Press doi:10.1093/plankt/fbu068 10670/1.wgy77s https://archimer.ifremer.fr/doc/00290/40091/39174.pdf https://archimer.ifremer.fr/doc/00290/40091/39177.pdf https://archimer.ifremer.fr/doc/00290/40091/39178.docx Archimer, archive institutionnelle de l'Ifremer Journal Of Plankton Research (0142-7873) (Oxford Univ Press), 2014-09 , Vol. 36 , N. 5 , P. 1175-1189 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1093/plankt/fbu068 2023-01-22T16:35:26Z Ocean iron fertilization experiments enable the quantitative study of processes shaping the structure and functioning of pelagic ecosystems following perturbation under in situ conditions. EIFEX was conducted within a stationary eddy adjacent to the Antarctic Polar Front over 38 days in February/March 2004 and induced a massive diatom bloom. Here, we present the responses in abundance and biomass of all identifiable protozooplankton taxa (heterotrophic protists ranging from 2 to 500 mm) during the bloom. Acantharia, dinoflagellates and ciliates together contributed >90% of protozooplankton biomass in the upper 100 m throughout the experiment with heterotrophic nanoflagellates, nassellaria, spumellaria, phaeodaria, foraminifera and the taxopodidean Sticholonche zanclea providing the remainder. Total protozooplankton biomass increased slightly from 1.0 to 1.3 g C m(-2) within the fertilized patch and remained at 0.7+0.04 g C m(-2) outside it. However, distinct trends in population build-up or decline were observed within the dominant taxa in each group. In general, smaller less-defended groups such as aloricate ciliates and athecate dinoflagellates declined, whereas the biomass of large, spiny and armoured groups, in particular acantharia, large tintinnids and thecate dinoflagellates increased inside the patch. We attribute the higher accumulation rates of defended taxa to selective, heavy grazing pressure by the large stocks of copepods. Of the defended taxa, acantharia had the lowest mortality rates and the highest biomass. Large stocks of tintinnid loricae in the deep water column identify this group as a relevant contributor to deep organic carbon export. Highest accumulation rates (0.11 day(-1)) were recorded in S. zanclea. Text Antarc* Antarctic Copepods Unknown Antarctic The Antarctic Journal of Plankton Research 36 5 1175 1189 |
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English |
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geo envir Assmy, Philipp Cisewski, Boris Henjes, Joachim Klaas, Christine Montresor, Marina Smetacek, Victor Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current |
topic_facet |
geo envir |
description |
Ocean iron fertilization experiments enable the quantitative study of processes shaping the structure and functioning of pelagic ecosystems following perturbation under in situ conditions. EIFEX was conducted within a stationary eddy adjacent to the Antarctic Polar Front over 38 days in February/March 2004 and induced a massive diatom bloom. Here, we present the responses in abundance and biomass of all identifiable protozooplankton taxa (heterotrophic protists ranging from 2 to 500 mm) during the bloom. Acantharia, dinoflagellates and ciliates together contributed >90% of protozooplankton biomass in the upper 100 m throughout the experiment with heterotrophic nanoflagellates, nassellaria, spumellaria, phaeodaria, foraminifera and the taxopodidean Sticholonche zanclea providing the remainder. Total protozooplankton biomass increased slightly from 1.0 to 1.3 g C m(-2) within the fertilized patch and remained at 0.7+0.04 g C m(-2) outside it. However, distinct trends in population build-up or decline were observed within the dominant taxa in each group. In general, smaller less-defended groups such as aloricate ciliates and athecate dinoflagellates declined, whereas the biomass of large, spiny and armoured groups, in particular acantharia, large tintinnids and thecate dinoflagellates increased inside the patch. We attribute the higher accumulation rates of defended taxa to selective, heavy grazing pressure by the large stocks of copepods. Of the defended taxa, acantharia had the lowest mortality rates and the highest biomass. Large stocks of tintinnid loricae in the deep water column identify this group as a relevant contributor to deep organic carbon export. Highest accumulation rates (0.11 day(-1)) were recorded in S. zanclea. |
format |
Text |
author |
Assmy, Philipp Cisewski, Boris Henjes, Joachim Klaas, Christine Montresor, Marina Smetacek, Victor |
author_facet |
Assmy, Philipp Cisewski, Boris Henjes, Joachim Klaas, Christine Montresor, Marina Smetacek, Victor |
author_sort |
Assmy, Philipp |
title |
Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current |
title_short |
Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current |
title_full |
Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current |
title_fullStr |
Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current |
title_full_unstemmed |
Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current |
title_sort |
response of the protozooplankton assemblage during the european iron fertilization experiment (eifex) in the antarctic circumpolar current |
publisher |
Oxford Univ Press |
url |
https://doi.org/10.1093/plankt/fbu068 https://archimer.ifremer.fr/doc/00290/40091/39174.pdf https://archimer.ifremer.fr/doc/00290/40091/39177.pdf https://archimer.ifremer.fr/doc/00290/40091/39178.docx |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Copepods |
genre_facet |
Antarc* Antarctic Copepods |
op_source |
Archimer, archive institutionnelle de l'Ifremer Journal Of Plankton Research (0142-7873) (Oxford Univ Press), 2014-09 , Vol. 36 , N. 5 , P. 1175-1189 |
op_relation |
doi:10.1093/plankt/fbu068 10670/1.wgy77s https://archimer.ifremer.fr/doc/00290/40091/39174.pdf https://archimer.ifremer.fr/doc/00290/40091/39177.pdf https://archimer.ifremer.fr/doc/00290/40091/39178.docx |
op_doi |
https://doi.org/10.1093/plankt/fbu068 |
container_title |
Journal of Plankton Research |
container_volume |
36 |
container_issue |
5 |
container_start_page |
1175 |
op_container_end_page |
1189 |
_version_ |
1766258010867367936 |