(Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment
During the European Iron Fertilisation Experiment (EIFEX), performed in the Southern Ocean, we investigated the reactions of different phytoplankton size classes to iron fertilization, applying measurements of size fractionated pigments, particulate organic matter, microscopy, and flow cytometry. Ch...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.848095 2024-09-15T17:43:36+00:00 (Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment Hoffmann, Linn Peeken, Ilka Lochte, Karin Assmy, Philipp Veldhuis, Marcel J W MINIMUM DEPTH, water: 20 m * MAXIMUM DEPTH, water: 20 m 2006 text/tab-separated-values, 73 data points https://doi.pangaea.de/10.1594/PANGAEA.848095 https://doi.org/10.1594/PANGAEA.848095 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.848095 https://doi.org/10.1594/PANGAEA.848095 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Hoffmann, Linn; Peeken, Ilka; Lochte, Karin; Assmy, Philipp; Veldhuis, Marcel J W (2006): Different reactions of Southern Ocean phytoplankton size classes to iron fertilization. Limnology and Oceanography, 51(3), 1217-1229, https://doi.org/10.4319/lo.2006.51.3.1217 Biogenic particulate silica/Carbon organic particulate Day of experiment DEPTH water Diatoms Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Ratio SPP1158 dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.84809510.4319/lo.2006.51.3.1217 2024-07-24T02:31:33Z During the European Iron Fertilisation Experiment (EIFEX), performed in the Southern Ocean, we investigated the reactions of different phytoplankton size classes to iron fertilization, applying measurements of size fractionated pigments, particulate organic matter, microscopy, and flow cytometry. Chlorophyll a (Chl a) concentrations at 20-m depth increased more than fivefold following fertilization through day 26, while concentrations of particulate organic carbon (POC), nitrogen (PON), and phosphorus (POP) roughly doubled through day 29. Concentrations of Chl a and particulate organic matter decreased toward the end of the experiment, indicating the demise of the iron-induced phytoplankton bloom. Despite a decrease in total diatom biomass at the end of the experiment, biogenic particulate silicate (bPSi) concentrations increased steadily due to a relative increase of heavily silicified diatoms. Although diatoms >10 µm were the main beneficiaries of iron fertilization, the growth of small diatoms (2-8 mm) was also enhanced, leading to a shift from a haptophyte- to a diatom-dominated community in this size fraction. The total biomass had lower than Redfield C : N, N : P, and C : P ratios but did not show significant trends after iron fertilization. This concealed various alterations in the elemental composition of the different size fractions. The microplankton (>20 µm) showed decreasing C : N and increasing N : P and C : P ratios, possibly caused by increased N uptake and the consumption of cellular P pools. The nanoplankton (2-20 µm) showed almost constant C : N and decreasing N : P and C : P ratios. Our results suggest that the latter is caused by a shift in composition of taxonomic groups. Dataset Antarc* Antarctic Phytoplankton Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Biogenic particulate silica/Carbon organic particulate Day of experiment DEPTH water Diatoms Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Ratio SPP1158 |
spellingShingle |
Biogenic particulate silica/Carbon organic particulate Day of experiment DEPTH water Diatoms Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Ratio SPP1158 Hoffmann, Linn Peeken, Ilka Lochte, Karin Assmy, Philipp Veldhuis, Marcel J W (Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment |
topic_facet |
Biogenic particulate silica/Carbon organic particulate Day of experiment DEPTH water Diatoms Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Ratio SPP1158 |
description |
During the European Iron Fertilisation Experiment (EIFEX), performed in the Southern Ocean, we investigated the reactions of different phytoplankton size classes to iron fertilization, applying measurements of size fractionated pigments, particulate organic matter, microscopy, and flow cytometry. Chlorophyll a (Chl a) concentrations at 20-m depth increased more than fivefold following fertilization through day 26, while concentrations of particulate organic carbon (POC), nitrogen (PON), and phosphorus (POP) roughly doubled through day 29. Concentrations of Chl a and particulate organic matter decreased toward the end of the experiment, indicating the demise of the iron-induced phytoplankton bloom. Despite a decrease in total diatom biomass at the end of the experiment, biogenic particulate silicate (bPSi) concentrations increased steadily due to a relative increase of heavily silicified diatoms. Although diatoms >10 µm were the main beneficiaries of iron fertilization, the growth of small diatoms (2-8 mm) was also enhanced, leading to a shift from a haptophyte- to a diatom-dominated community in this size fraction. The total biomass had lower than Redfield C : N, N : P, and C : P ratios but did not show significant trends after iron fertilization. This concealed various alterations in the elemental composition of the different size fractions. The microplankton (>20 µm) showed decreasing C : N and increasing N : P and C : P ratios, possibly caused by increased N uptake and the consumption of cellular P pools. The nanoplankton (2-20 µm) showed almost constant C : N and decreasing N : P and C : P ratios. Our results suggest that the latter is caused by a shift in composition of taxonomic groups. |
format |
Dataset |
author |
Hoffmann, Linn Peeken, Ilka Lochte, Karin Assmy, Philipp Veldhuis, Marcel J W |
author_facet |
Hoffmann, Linn Peeken, Ilka Lochte, Karin Assmy, Philipp Veldhuis, Marcel J W |
author_sort |
Hoffmann, Linn |
title |
(Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment |
title_short |
(Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment |
title_full |
(Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment |
title_fullStr |
(Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment |
title_full_unstemmed |
(Tables 2) The bPSi:POC ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the EIFEX experiment |
title_sort |
(tables 2) the bpsi:poc ratio of the total diatom community, and abundance of full, empty, and broken diatom cells compared to heavily silicified diatoms during the eifex experiment |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.848095 https://doi.org/10.1594/PANGAEA.848095 |
op_coverage |
MINIMUM DEPTH, water: 20 m * MAXIMUM DEPTH, water: 20 m |
genre |
Antarc* Antarctic Phytoplankton Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Phytoplankton Sea ice Southern Ocean |
op_source |
Supplement to: Hoffmann, Linn; Peeken, Ilka; Lochte, Karin; Assmy, Philipp; Veldhuis, Marcel J W (2006): Different reactions of Southern Ocean phytoplankton size classes to iron fertilization. Limnology and Oceanography, 51(3), 1217-1229, https://doi.org/10.4319/lo.2006.51.3.1217 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.848095 https://doi.org/10.1594/PANGAEA.848095 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.84809510.4319/lo.2006.51.3.1217 |
_version_ |
1810490634031595520 |