Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean
The dynamics of phytoplankton species populations recorded during the 3-week, iron-fertilization experiment EisenEx carried out in spring in the Antarctic Polar Frontal Zone are presented and discussed as the difference between growth and mortality rates. Only two cosmopolitan diatom species, the ce...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.552191 2023-05-15T13:42:09+02:00 Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean Assmy, Philipp Henjes, Joachim Klaas, Christine Smetacek, Victor MEDIAN LATITUDE: -48.076825 * MEDIAN LONGITUDE: 20.929544 * SOUTH-BOUND LATITUDE: -48.593000 * WEST-BOUND LONGITUDE: 20.647333 * NORTH-BOUND LATITUDE: -47.668167 * EAST-BOUND LONGITUDE: 21.168667 * DATE/TIME START: 2000-11-06T23:25:00 * DATE/TIME END: 2000-11-29T15:33:00 2007-11-30 application/zip, 95 datasets https://doi.pangaea.de/10.1594/PANGAEA.552191 https://doi.org/10.1594/PANGAEA.552191 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.552191 https://doi.org/10.1594/PANGAEA.552191 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Assmy, Philipp; Henjes, Joachim; Klaas, Christine; Smetacek, Victor (2007): Mechanisms determining species dominance in a phytoplankton bloom induced by the iron fertilization experiment EisenEx in the Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 54(3), 340-362, https://doi.org/10.1016/j.dsr.2006.12.005 ANT-XVIII/2 CTD/Rosette CTD117 CTD123 CTD126 CTD128 CTD145 CTD149 CTD16 CTD18 CTD45 CTD51 CTD54 CTD57 CTD61 CTD66 CTD70 CTD74 CTD88 CTD9 CTD-RO EisenEx European Iron Enrichment Experiment in the Southern Ocean Polarstern PS58/009-2 PS58/011-3 PS58/012-5 PS58/014-4 PS58/038-3 PS58/041-2 PS58/042-2 PS58/043-2 PS58/045-2 PS58/046-3 PS58/048-3 PS58/049-3 PS58/061-3 PS58/088-4 PS58/090-4 PS58/091-4 PS58/092-3 PS58/107-5 PS58/108-1 PS58 EISENEX South Atlantic Dataset 2007 ftpangaea https://doi.org/10.1594/PANGAEA.552191 https://doi.org/10.1016/j.dsr.2006.12.005 2023-01-20T07:31:01Z The dynamics of phytoplankton species populations recorded during the 3-week, iron-fertilization experiment EisenEx carried out in spring in the Antarctic Polar Frontal Zone are presented and discussed as the difference between growth and mortality rates. Only two cosmopolitan diatom species, the centric Chaetoceros debilis and the pennate Pseudo-nitzschia lineola, increased population density exponentially throughout the experiment to 150-fold and 90-fold of initial values respectively. Because C. debilis initial abundance was tenfold lower than that of P. lineola, the two contributed 1 % and 21 % to bloom biomass respectively at the end of the experiment, high-lighting the role of seeding in bloom formation. The other significant species increased population size at a linear rate throughout the experiment or for a short spurt phase to 3 to 18-fold of initial values. Conservative estimates of mortality rates within diatom species populations were obtained by comparing net accumulation rates of full cells with those of empty and broken frustules. The ratios were consistent over time for the various species but varied widely between them. The species-specific variation can be explained by differences in both growth and mortality rates, the latter partly due to either selective grazing or avoidance by the large protozoo- and metazooplankton populations present. Selective predation by the abundant copepod populations on protistan grazers (ciliates and heterotrophic dinoflagellates) of diatoms apparently aided diatom biomass build-up. The response patterns of populations of the phytoplankton species present fall into 6 categories comprising disparate species, indicating that phylogeny is a poor predictor of ecology. The group that did not respond to fertilization was the most diverse and included both endemic and cosmopolitan as well as background and bloom-forming species. This lack of response to the advent of favorable growth conditions indicates that proximate factors during EisenEx triggered growth only in some ... Dataset Antarc* Antarctic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean The Antarctic ENVELOPE(20.647333,21.168667,-47.668167,-48.593000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XVIII/2 CTD/Rosette CTD117 CTD123 CTD126 CTD128 CTD145 CTD149 CTD16 CTD18 CTD45 CTD51 CTD54 CTD57 CTD61 CTD66 CTD70 CTD74 CTD88 CTD9 CTD-RO EisenEx European Iron Enrichment Experiment in the Southern Ocean Polarstern PS58/009-2 PS58/011-3 PS58/012-5 PS58/014-4 PS58/038-3 PS58/041-2 PS58/042-2 PS58/043-2 PS58/045-2 PS58/046-3 PS58/048-3 PS58/049-3 PS58/061-3 PS58/088-4 PS58/090-4 PS58/091-4 PS58/092-3 PS58/107-5 PS58/108-1 PS58 EISENEX South Atlantic |
spellingShingle |
ANT-XVIII/2 CTD/Rosette CTD117 CTD123 CTD126 CTD128 CTD145 CTD149 CTD16 CTD18 CTD45 CTD51 CTD54 CTD57 CTD61 CTD66 CTD70 CTD74 CTD88 CTD9 CTD-RO EisenEx European Iron Enrichment Experiment in the Southern Ocean Polarstern PS58/009-2 PS58/011-3 PS58/012-5 PS58/014-4 PS58/038-3 PS58/041-2 PS58/042-2 PS58/043-2 PS58/045-2 PS58/046-3 PS58/048-3 PS58/049-3 PS58/061-3 PS58/088-4 PS58/090-4 PS58/091-4 PS58/092-3 PS58/107-5 PS58/108-1 PS58 EISENEX South Atlantic Assmy, Philipp Henjes, Joachim Klaas, Christine Smetacek, Victor Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean |
topic_facet |
ANT-XVIII/2 CTD/Rosette CTD117 CTD123 CTD126 CTD128 CTD145 CTD149 CTD16 CTD18 CTD45 CTD51 CTD54 CTD57 CTD61 CTD66 CTD70 CTD74 CTD88 CTD9 CTD-RO EisenEx European Iron Enrichment Experiment in the Southern Ocean Polarstern PS58/009-2 PS58/011-3 PS58/012-5 PS58/014-4 PS58/038-3 PS58/041-2 PS58/042-2 PS58/043-2 PS58/045-2 PS58/046-3 PS58/048-3 PS58/049-3 PS58/061-3 PS58/088-4 PS58/090-4 PS58/091-4 PS58/092-3 PS58/107-5 PS58/108-1 PS58 EISENEX South Atlantic |
description |
The dynamics of phytoplankton species populations recorded during the 3-week, iron-fertilization experiment EisenEx carried out in spring in the Antarctic Polar Frontal Zone are presented and discussed as the difference between growth and mortality rates. Only two cosmopolitan diatom species, the centric Chaetoceros debilis and the pennate Pseudo-nitzschia lineola, increased population density exponentially throughout the experiment to 150-fold and 90-fold of initial values respectively. Because C. debilis initial abundance was tenfold lower than that of P. lineola, the two contributed 1 % and 21 % to bloom biomass respectively at the end of the experiment, high-lighting the role of seeding in bloom formation. The other significant species increased population size at a linear rate throughout the experiment or for a short spurt phase to 3 to 18-fold of initial values. Conservative estimates of mortality rates within diatom species populations were obtained by comparing net accumulation rates of full cells with those of empty and broken frustules. The ratios were consistent over time for the various species but varied widely between them. The species-specific variation can be explained by differences in both growth and mortality rates, the latter partly due to either selective grazing or avoidance by the large protozoo- and metazooplankton populations present. Selective predation by the abundant copepod populations on protistan grazers (ciliates and heterotrophic dinoflagellates) of diatoms apparently aided diatom biomass build-up. The response patterns of populations of the phytoplankton species present fall into 6 categories comprising disparate species, indicating that phylogeny is a poor predictor of ecology. The group that did not respond to fertilization was the most diverse and included both endemic and cosmopolitan as well as background and bloom-forming species. This lack of response to the advent of favorable growth conditions indicates that proximate factors during EisenEx triggered growth only in some ... |
format |
Dataset |
author |
Assmy, Philipp Henjes, Joachim Klaas, Christine Smetacek, Victor |
author_facet |
Assmy, Philipp Henjes, Joachim Klaas, Christine Smetacek, Victor |
author_sort |
Assmy, Philipp |
title |
Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean |
title_short |
Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean |
title_full |
Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean |
title_fullStr |
Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean |
title_full_unstemmed |
Diatom abundance counted on water bottle samples from the EisenEx cruise to the Southern Ocean |
title_sort |
diatom abundance counted on water bottle samples from the eisenex cruise to the southern ocean |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.552191 https://doi.org/10.1594/PANGAEA.552191 |
op_coverage |
MEDIAN LATITUDE: -48.076825 * MEDIAN LONGITUDE: 20.929544 * SOUTH-BOUND LATITUDE: -48.593000 * WEST-BOUND LONGITUDE: 20.647333 * NORTH-BOUND LATITUDE: -47.668167 * EAST-BOUND LONGITUDE: 21.168667 * DATE/TIME START: 2000-11-06T23:25:00 * DATE/TIME END: 2000-11-29T15:33:00 |
long_lat |
ENVELOPE(20.647333,21.168667,-47.668167,-48.593000) |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Supplement to: Assmy, Philipp; Henjes, Joachim; Klaas, Christine; Smetacek, Victor (2007): Mechanisms determining species dominance in a phytoplankton bloom induced by the iron fertilization experiment EisenEx in the Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 54(3), 340-362, https://doi.org/10.1016/j.dsr.2006.12.005 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.552191 https://doi.org/10.1594/PANGAEA.552191 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.552191 https://doi.org/10.1016/j.dsr.2006.12.005 |
_version_ |
1766163201131544576 |