Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean
The taxonomic composition and types of particles comprising the downward particle flux were examined during the mesoscale artificial iron fertilisation experiment LOHAFEX. The experiment was conducted in low-silicate waters of the Atlantic Sector of the Southern Ocean during austral summer (January–...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Language: | English |
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2014
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ftsouthampton:oai:eprints.soton.ac.uk:367440 2023-07-30T04:07:01+02:00 Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean Ebersbach, Friederike Assmy, Philipp Martin, Patrick Schulz, Isabelle Wolzenburg, Sina Nöthig, Eva-Maria 2014-07 text https://eprints.soton.ac.uk/367440/ https://eprints.soton.ac.uk/367440/1/1-s2.0-S0967063714000570-main.pdf en English eng https://eprints.soton.ac.uk/367440/1/1-s2.0-S0967063714000570-main.pdf Ebersbach, Friederike, Assmy, Philipp, Martin, Patrick, Schulz, Isabelle, Wolzenburg, Sina and Nöthig, Eva-Maria (2014) Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 89, 94-103. (doi:10.1016/j.dsr.2014.04.007 <http://dx.doi.org/10.1016/j.dsr.2014.04.007>). other Article PeerReviewed 2014 ftsouthampton https://doi.org/10.1016/j.dsr.2014.04.007 2023-07-09T21:54:16Z The taxonomic composition and types of particles comprising the downward particle flux were examined during the mesoscale artificial iron fertilisation experiment LOHAFEX. The experiment was conducted in low-silicate waters of the Atlantic Sector of the Southern Ocean during austral summer (January–March 2009), and induced a bloom dominated by small flagellates. Downward particle flux was low throughout the experiment, and not enhanced by addition of iron; neutrally buoyant sediment traps contained mostly faecal pellets and faecal material apparently reprocessed by mesozooplankton. TEP fluxes were low, ?5 mg GX eq. m?2 d?1, and a few phytodetrital aggregates were found in the sediment traps. Only a few per cent of the POC flux was found in the traps consisting of intact protist plankton, although remains of taxa with hard body parts (diatoms, tintinnids, thecate dinoflagellates and foraminifera) were numerous, far more so than intact specimens of these taxa. Nevertheless, many small flagellates and coccoid cells, belonging to the pico- and nanoplankton, were found in the traps, and these small, soft-bodied cells probably contributed the majority of downward POC flux via mesozooplankton grazing and faecal pellet export. TEP likely played an important role by aggregating these small cells, and making them more readily available to mesozooplankton grazers. Article in Journal/Newspaper Southern Ocean University of Southampton: e-Prints Soton Austral Southern Ocean Deep Sea Research Part I: Oceanographic Research Papers 89 94 103 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The taxonomic composition and types of particles comprising the downward particle flux were examined during the mesoscale artificial iron fertilisation experiment LOHAFEX. The experiment was conducted in low-silicate waters of the Atlantic Sector of the Southern Ocean during austral summer (January–March 2009), and induced a bloom dominated by small flagellates. Downward particle flux was low throughout the experiment, and not enhanced by addition of iron; neutrally buoyant sediment traps contained mostly faecal pellets and faecal material apparently reprocessed by mesozooplankton. TEP fluxes were low, ?5 mg GX eq. m?2 d?1, and a few phytodetrital aggregates were found in the sediment traps. Only a few per cent of the POC flux was found in the traps consisting of intact protist plankton, although remains of taxa with hard body parts (diatoms, tintinnids, thecate dinoflagellates and foraminifera) were numerous, far more so than intact specimens of these taxa. Nevertheless, many small flagellates and coccoid cells, belonging to the pico- and nanoplankton, were found in the traps, and these small, soft-bodied cells probably contributed the majority of downward POC flux via mesozooplankton grazing and faecal pellet export. TEP likely played an important role by aggregating these small cells, and making them more readily available to mesozooplankton grazers. |
format |
Article in Journal/Newspaper |
author |
Ebersbach, Friederike Assmy, Philipp Martin, Patrick Schulz, Isabelle Wolzenburg, Sina Nöthig, Eva-Maria |
spellingShingle |
Ebersbach, Friederike Assmy, Philipp Martin, Patrick Schulz, Isabelle Wolzenburg, Sina Nöthig, Eva-Maria Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean |
author_facet |
Ebersbach, Friederike Assmy, Philipp Martin, Patrick Schulz, Isabelle Wolzenburg, Sina Nöthig, Eva-Maria |
author_sort |
Ebersbach, Friederike |
title |
Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean |
title_short |
Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean |
title_full |
Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean |
title_fullStr |
Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean |
title_full_unstemmed |
Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean |
title_sort |
particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment lohafex in the southern ocean |
publishDate |
2014 |
url |
https://eprints.soton.ac.uk/367440/ https://eprints.soton.ac.uk/367440/1/1-s2.0-S0967063714000570-main.pdf |
geographic |
Austral Southern Ocean |
geographic_facet |
Austral Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://eprints.soton.ac.uk/367440/1/1-s2.0-S0967063714000570-main.pdf Ebersbach, Friederike, Assmy, Philipp, Martin, Patrick, Schulz, Isabelle, Wolzenburg, Sina and Nöthig, Eva-Maria (2014) Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 89, 94-103. (doi:10.1016/j.dsr.2014.04.007 <http://dx.doi.org/10.1016/j.dsr.2014.04.007>). |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.dsr.2014.04.007 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
89 |
container_start_page |
94 |
op_container_end_page |
103 |
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1772820081319870464 |