Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791
The responses of larger (>50 µm in diameter) protozooplankton groups to a phytoplankton bloom induced by in situ iron fertilization (EisenEx) in the Polar Frontal Zone (PFZ) of the Southern Ocean in austral spring are presented. During the 21 days of the experiment, samples were collected from se...
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ftdatacite:10.1594/pangaea.552509 2023-05-15T18:24:51+02:00 Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791 Henjes, Joachim Assmy, Philipp Klaas, Christine Smetacek, Victor 2006 application/zip https://dx.doi.org/10.1594/pangaea.552509 https://doi.pangaea.de/10.1594/PANGAEA.552509 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.dsr.2007.02.005 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY CTD/Rosette ANT-XVIII/2 Polarstern European Iron Enrichment Experiment in the Southern Ocean EisenEx Collection article Supplementary Collection of Datasets 2006 ftdatacite https://doi.org/10.1594/pangaea.552509 https://doi.org/10.1016/j.dsr.2007.02.005 2021-11-05T12:55:41Z The responses of larger (>50 µm in diameter) protozooplankton groups to a phytoplankton bloom induced by in situ iron fertilization (EisenEx) in the Polar Frontal Zone (PFZ) of the Southern Ocean in austral spring are presented. During the 21 days of the experiment, samples were collected from seven discrete depths in the upper 150 m inside and outside the fertilized patch for the enumeration of acantharia, foraminifera, radiolaria, heliozoa, tintinnid ciliates and aplastidic thecate dinoflagellates. Inside the patch, acantharian numbers increased twofold, but only negligibly in surrounding waters. This finding is of major interest, since acantharia are suggested to be involved in the formation of barite (BaSO_4 ) found in sediments and which is a palaeoindicator of both ancient and modern high productivity regimes. Foraminifera increased significantly in abundance inside and outside the fertilized patch. However the marked increase of juveniles after a full moon event suggests a lunar periodicity in the reproduction cycle of some foraminiferan species rather than a reproductive response to enhanced food availability. In contrast, adult radiolaria showed no clear trend during the experiment, but juveniles increased threefold indicating elevated reproduction. Aplastidic thecate dinoflagellates almost doubled in numbers and biomass, but also increased outside the patch. Tintinnid numbers decreased twofold, although biomass remained constant due to a shift in the size spectrum. Empty tintinnid loricae, however, increased by a factor of two indicating that grazing pressure on this group mainly by copepods intensified during EisenEx. The results show that iron-fertilization experiments can shed light on the biology and the role of these larger protists in pelagic ecosystem which will improve their use as proxies in palaeoceanography. Article in Journal/Newspaper Southern Ocean Copepods DataCite Metadata Store (German National Library of Science and Technology) Austral Southern Ocean |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
CTD/Rosette ANT-XVIII/2 Polarstern European Iron Enrichment Experiment in the Southern Ocean EisenEx |
spellingShingle |
CTD/Rosette ANT-XVIII/2 Polarstern European Iron Enrichment Experiment in the Southern Ocean EisenEx Henjes, Joachim Assmy, Philipp Klaas, Christine Smetacek, Victor Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791 |
topic_facet |
CTD/Rosette ANT-XVIII/2 Polarstern European Iron Enrichment Experiment in the Southern Ocean EisenEx |
description |
The responses of larger (>50 µm in diameter) protozooplankton groups to a phytoplankton bloom induced by in situ iron fertilization (EisenEx) in the Polar Frontal Zone (PFZ) of the Southern Ocean in austral spring are presented. During the 21 days of the experiment, samples were collected from seven discrete depths in the upper 150 m inside and outside the fertilized patch for the enumeration of acantharia, foraminifera, radiolaria, heliozoa, tintinnid ciliates and aplastidic thecate dinoflagellates. Inside the patch, acantharian numbers increased twofold, but only negligibly in surrounding waters. This finding is of major interest, since acantharia are suggested to be involved in the formation of barite (BaSO_4 ) found in sediments and which is a palaeoindicator of both ancient and modern high productivity regimes. Foraminifera increased significantly in abundance inside and outside the fertilized patch. However the marked increase of juveniles after a full moon event suggests a lunar periodicity in the reproduction cycle of some foraminiferan species rather than a reproductive response to enhanced food availability. In contrast, adult radiolaria showed no clear trend during the experiment, but juveniles increased threefold indicating elevated reproduction. Aplastidic thecate dinoflagellates almost doubled in numbers and biomass, but also increased outside the patch. Tintinnid numbers decreased twofold, although biomass remained constant due to a shift in the size spectrum. Empty tintinnid loricae, however, increased by a factor of two indicating that grazing pressure on this group mainly by copepods intensified during EisenEx. The results show that iron-fertilization experiments can shed light on the biology and the role of these larger protists in pelagic ecosystem which will improve their use as proxies in palaeoceanography. |
format |
Article in Journal/Newspaper |
author |
Henjes, Joachim Assmy, Philipp Klaas, Christine Smetacek, Victor |
author_facet |
Henjes, Joachim Assmy, Philipp Klaas, Christine Smetacek, Victor |
author_sort |
Henjes, Joachim |
title |
Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791 |
title_short |
Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791 |
title_full |
Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791 |
title_fullStr |
Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791 |
title_full_unstemmed |
Abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the EisenEx experiment in 2000 in the Southern Ocean, supplement to: Henjes, Joachim; Assmy, Philipp; Klaas, Christine; Smetacek, Victor (2007): Response of the larger protozooplankton to an iron-induced phytoplankton bloom in the Polar Frontal Zone of the Southern Ocean (EisenEx). Deep Sea Research Part I: Oceanographic Research Papers, 54(5), 774-791 |
title_sort |
abundance and biomass of protozooplankton from the iron-induced phytoplankton bloom during the eisenex experiment in 2000 in the southern ocean, supplement to: henjes, joachim; assmy, philipp; klaas, christine; smetacek, victor (2007): response of the larger protozooplankton to an iron-induced phytoplankton bloom in the polar frontal zone of the southern ocean (eisenex). deep sea research part i: oceanographic research papers, 54(5), 774-791 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2006 |
url |
https://dx.doi.org/10.1594/pangaea.552509 https://doi.pangaea.de/10.1594/PANGAEA.552509 |
geographic |
Austral Southern Ocean |
geographic_facet |
Austral Southern Ocean |
genre |
Southern Ocean Copepods |
genre_facet |
Southern Ocean Copepods |
op_relation |
https://dx.doi.org/10.1016/j.dsr.2007.02.005 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.552509 https://doi.org/10.1016/j.dsr.2007.02.005 |
_version_ |
1766205805184417792 |