(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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Bibliographic Details
Main Authors: Hoffmann, Linn, Peeken, Ilka, Lochte, Karin, Assmy, Philipp, Veldhuis, Marcel J W
Format: Dataset
Language:English
Published: PANGAEA 2006
Subjects:
DEPTH, water
Day of experiment
Biogenic particulate silica/Carbon, organic, particulate
Diatoms
Ratio
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158
Arctic
Antarctic
Southern Ocean
Antarc*
Antarctica
Phytoplankton
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.848095
https://doi.pangaea.de/10.1594/PANGAEA.848095
Description
Summary: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) ... : Please note: Thalassiothrix antarctica, Fragilariopsis kerguelensis, F. obliquecostata/ritscheri, Thalassiosira lentiginosa, Thalassionema nitzschioides, and Thalassiosira gracilis are here referred to as heavily silicified diatoms.Experiment was conducted at 49.3°S and 2.2°E during ANT-XXI/3 (2004-01-21 to 2004-03-25) ...

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