Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean
Arctic primary production is sensitive to reductions in sea ice cover, and will likely increase into the future. Whether this increased primary production (PP) will translate into increased export of particulate organic carbon (POC) is currently unclear. Here we report on the POC export efficiency d...
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ftsouthampton:oai:eprints.soton.ac.uk:376625 2023-07-30T04:00:01+02:00 Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean Le Moigne, Frédéric A.C. Poulton, Alex J. Henson, Stephanie A. Daniels, Chris J. Fragoso, Glaucia M. Mitchell, Elaine Richier, Sophie Smith, Helen E.K. Russell, Benjamin C. Tarling, Geraint A. Young, Jeremy R. Zubkov, Mike 2015-06 text https://eprints.soton.ac.uk/376625/ https://eprints.soton.ac.uk/376625/1/grl52778.pdf en English eng https://eprints.soton.ac.uk/376625/1/grl52778.pdf Le Moigne, Frédéric A.C., Poulton, Alex J., Henson, Stephanie A., Daniels, Chris J., Fragoso, Glaucia M., Mitchell, Elaine, Richier, Sophie, Smith, Helen E.K., Russell, Benjamin C., Tarling, Geraint A., Young, Jeremy R. and Zubkov, Mike (2015) Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean. Journal of Geophysical Research: Oceans, 120 (6), 3896-3912. (doi:10.1002/2015JC010700 <http://dx.doi.org/10.1002/2015JC010700>). cc_by_4 Article PeerReviewed 2015 ftsouthampton https://doi.org/10.1002/2015JC010700 2023-07-09T21:58:48Z Arctic primary production is sensitive to reductions in sea ice cover, and will likely increase into the future. Whether this increased primary production (PP) will translate into increased export of particulate organic carbon (POC) is currently unclear. Here we report on the POC export efficiency during summer 2012 in the Atlantic sector of the Arctic Ocean. We coupled 234-Thorium based estimates of the export flux of POC to onboard incubation based estimates of PP. Export efficiency (defined as the fraction of PP that is exported below 100 m depth: ThE-ratio) showed large variability (0.09?±?0.19 to 1.3?±?0.3). The highest ThE-ratio (1.3?±?0.3) was recorded in a mono-specific bloom of Phaeocystis pouchetii located in the ice edge. Blooming diatom dominated areas also had high ThE-ratios (0.1?±?0.1 to 0.5?±?0.2), while mixed and/or pre-bloom communities showed lower ThE-ratios (0.10?±?0.03 to 0.19?±?0.05). Furthermore, using oxygen saturation, bacterial abundance, bacterial production, and zooplankton oxygen demand, we also investigated spatial variability in the degree to which this sinking material may be remineralised in the upper mesopelagic (< 300 m). Our results suggest that blooming diatoms and P. pouchetii can export a significant fraction of their biomass below the surface layer (100 m) in the open Arctic Ocean. Also, we show evidence that the material sinking from a P. pouchetii bloom may be remineralised (>100m) at a similar rate as the material sinking from diatom blooms in the upper mesopelagic, contrary to previous findings. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Phytoplankton Sea ice Zooplankton University of Southampton: e-Prints Soton Arctic Arctic Ocean Journal of Geophysical Research: Oceans 120 6 3896 3912 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
Arctic primary production is sensitive to reductions in sea ice cover, and will likely increase into the future. Whether this increased primary production (PP) will translate into increased export of particulate organic carbon (POC) is currently unclear. Here we report on the POC export efficiency during summer 2012 in the Atlantic sector of the Arctic Ocean. We coupled 234-Thorium based estimates of the export flux of POC to onboard incubation based estimates of PP. Export efficiency (defined as the fraction of PP that is exported below 100 m depth: ThE-ratio) showed large variability (0.09?±?0.19 to 1.3?±?0.3). The highest ThE-ratio (1.3?±?0.3) was recorded in a mono-specific bloom of Phaeocystis pouchetii located in the ice edge. Blooming diatom dominated areas also had high ThE-ratios (0.1?±?0.1 to 0.5?±?0.2), while mixed and/or pre-bloom communities showed lower ThE-ratios (0.10?±?0.03 to 0.19?±?0.05). Furthermore, using oxygen saturation, bacterial abundance, bacterial production, and zooplankton oxygen demand, we also investigated spatial variability in the degree to which this sinking material may be remineralised in the upper mesopelagic (< 300 m). Our results suggest that blooming diatoms and P. pouchetii can export a significant fraction of their biomass below the surface layer (100 m) in the open Arctic Ocean. Also, we show evidence that the material sinking from a P. pouchetii bloom may be remineralised (>100m) at a similar rate as the material sinking from diatom blooms in the upper mesopelagic, contrary to previous findings. |
format |
Article in Journal/Newspaper |
author |
Le Moigne, Frédéric A.C. Poulton, Alex J. Henson, Stephanie A. Daniels, Chris J. Fragoso, Glaucia M. Mitchell, Elaine Richier, Sophie Smith, Helen E.K. Russell, Benjamin C. Tarling, Geraint A. Young, Jeremy R. Zubkov, Mike |
spellingShingle |
Le Moigne, Frédéric A.C. Poulton, Alex J. Henson, Stephanie A. Daniels, Chris J. Fragoso, Glaucia M. Mitchell, Elaine Richier, Sophie Smith, Helen E.K. Russell, Benjamin C. Tarling, Geraint A. Young, Jeremy R. Zubkov, Mike Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean |
author_facet |
Le Moigne, Frédéric A.C. Poulton, Alex J. Henson, Stephanie A. Daniels, Chris J. Fragoso, Glaucia M. Mitchell, Elaine Richier, Sophie Smith, Helen E.K. Russell, Benjamin C. Tarling, Geraint A. Young, Jeremy R. Zubkov, Mike |
author_sort |
Le Moigne, Frédéric A.C. |
title |
Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean |
title_short |
Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean |
title_full |
Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean |
title_fullStr |
Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean |
title_full_unstemmed |
Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean |
title_sort |
carbon export efficiency and phytoplankton community composition in the atlantic sector of the arctic ocean |
publishDate |
2015 |
url |
https://eprints.soton.ac.uk/376625/ https://eprints.soton.ac.uk/376625/1/grl52778.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Phytoplankton Sea ice Zooplankton |
genre_facet |
Arctic Arctic Arctic Ocean Phytoplankton Sea ice Zooplankton |
op_relation |
https://eprints.soton.ac.uk/376625/1/grl52778.pdf Le Moigne, Frédéric A.C., Poulton, Alex J., Henson, Stephanie A., Daniels, Chris J., Fragoso, Glaucia M., Mitchell, Elaine, Richier, Sophie, Smith, Helen E.K., Russell, Benjamin C., Tarling, Geraint A., Young, Jeremy R. and Zubkov, Mike (2015) Carbon export efficiency and phytoplankton community composition in the Atlantic sector of the Arctic Ocean. Journal of Geophysical Research: Oceans, 120 (6), 3896-3912. (doi:10.1002/2015JC010700 <http://dx.doi.org/10.1002/2015JC010700>). |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1002/2015JC010700 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
6 |
container_start_page |
3896 |
op_container_end_page |
3912 |
_version_ |
1772810668360073216 |