Iron limitation of the postbloom phytoplankton communities in the Iceland Basin

Measurements performed on a cruise within the central Iceland Basin in the high-latitude (>55°N) North Atlantic Ocean during late July to early September 2007 indicated that the concentration of dissolved iron (dFe) in surface waters was very low, with an average of 0.093 (<0.010–0.218, n = 43...

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Published in:Global Biogeochemical Cycles
Main Authors: Nielsdóttir, Maria C., Moore, Christopher Mark, Sanders, Richard, Hinz, Daria J., Achterberg, Eric P.
Format: Article in Journal/Newspaper
Language:unknown
Published: 2009
Subjects:
Online Access:http://nora.nerc.ac.uk/id/eprint/167453/
http://www.agu.org/pubs/crossref/2009/2008GB003410.shtml
https://doi.org/10.1029/2008GB003410
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spelling ftnerc:oai:nora.nerc.ac.uk:167453 2023-05-15T16:47:36+02:00 Iron limitation of the postbloom phytoplankton communities in the Iceland Basin Nielsdóttir, Maria C. Moore, Christopher Mark Sanders, Richard Hinz, Daria J. Achterberg, Eric P. 2009-07-01 http://nora.nerc.ac.uk/id/eprint/167453/ http://www.agu.org/pubs/crossref/2009/2008GB003410.shtml https://doi.org/10.1029/2008GB003410 unknown Nielsdóttir, Maria C.; Moore, Christopher Mark; Sanders, Richard orcid:0000-0002-6884-7131 Hinz, Daria J.; Achterberg, Eric P. 2009 Iron limitation of the postbloom phytoplankton communities in the Iceland Basin. Global Biogeochemical Cycles, 23. GB3001. https://doi.org/10.1029/2008GB003410 <https://doi.org/10.1029/2008GB003410> Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1029/2008GB003410 2023-02-04T19:35:29Z Measurements performed on a cruise within the central Iceland Basin in the high-latitude (>55°N) North Atlantic Ocean during late July to early September 2007 indicated that the concentration of dissolved iron (dFe) in surface waters was very low, with an average of 0.093 (<0.010–0.218, n = 43) nM, while nitrate concentrations ranged from 2 to 5 μM and in situ chlorophyll concentrations ranged from 0.2 to 0.4 mg m−3. In vitro iron addition experiments demonstrated increased photosynthetic efficiencies (Fv/Fm) and enhanced chlorophyll accumulation in treatments amended with iron when compared to controls. Enhanced net growth rates for a number of phytoplankton taxa including the coccolithophore Emiliania huxleyi were also observed following iron addition. These results provide strong evidence that iron limitation within the postspring bloom phytoplankton community contributes to the observed residual macronutrient pool during summer. Low atmospheric iron supply and suboptimal Fe:N ratios in winter overturned deep water are suggested to result in the formation of this seasonal high-nutrient, low-chlorophyll (HNLC) condition, representing an inefficiency of the biological (soft tissue) carbon pump in the region. Article in Journal/Newspaper Iceland North Atlantic Natural Environment Research Council: NERC Open Research Archive Global Biogeochemical Cycles 23 3 n/a n/a
institution Open Polar
collection Natural Environment Research Council: NERC Open Research Archive
op_collection_id ftnerc
language unknown
description Measurements performed on a cruise within the central Iceland Basin in the high-latitude (>55°N) North Atlantic Ocean during late July to early September 2007 indicated that the concentration of dissolved iron (dFe) in surface waters was very low, with an average of 0.093 (<0.010–0.218, n = 43) nM, while nitrate concentrations ranged from 2 to 5 μM and in situ chlorophyll concentrations ranged from 0.2 to 0.4 mg m−3. In vitro iron addition experiments demonstrated increased photosynthetic efficiencies (Fv/Fm) and enhanced chlorophyll accumulation in treatments amended with iron when compared to controls. Enhanced net growth rates for a number of phytoplankton taxa including the coccolithophore Emiliania huxleyi were also observed following iron addition. These results provide strong evidence that iron limitation within the postspring bloom phytoplankton community contributes to the observed residual macronutrient pool during summer. Low atmospheric iron supply and suboptimal Fe:N ratios in winter overturned deep water are suggested to result in the formation of this seasonal high-nutrient, low-chlorophyll (HNLC) condition, representing an inefficiency of the biological (soft tissue) carbon pump in the region.
format Article in Journal/Newspaper
author Nielsdóttir, Maria C.
Moore, Christopher Mark
Sanders, Richard
Hinz, Daria J.
Achterberg, Eric P.
spellingShingle Nielsdóttir, Maria C.
Moore, Christopher Mark
Sanders, Richard
Hinz, Daria J.
Achterberg, Eric P.
Iron limitation of the postbloom phytoplankton communities in the Iceland Basin
author_facet Nielsdóttir, Maria C.
Moore, Christopher Mark
Sanders, Richard
Hinz, Daria J.
Achterberg, Eric P.
author_sort Nielsdóttir, Maria C.
title Iron limitation of the postbloom phytoplankton communities in the Iceland Basin
title_short Iron limitation of the postbloom phytoplankton communities in the Iceland Basin
title_full Iron limitation of the postbloom phytoplankton communities in the Iceland Basin
title_fullStr Iron limitation of the postbloom phytoplankton communities in the Iceland Basin
title_full_unstemmed Iron limitation of the postbloom phytoplankton communities in the Iceland Basin
title_sort iron limitation of the postbloom phytoplankton communities in the iceland basin
publishDate 2009
url http://nora.nerc.ac.uk/id/eprint/167453/
http://www.agu.org/pubs/crossref/2009/2008GB003410.shtml
https://doi.org/10.1029/2008GB003410
genre Iceland
North Atlantic
genre_facet Iceland
North Atlantic
op_relation Nielsdóttir, Maria C.; Moore, Christopher Mark; Sanders, Richard orcid:0000-0002-6884-7131
Hinz, Daria J.; Achterberg, Eric P. 2009 Iron limitation of the postbloom phytoplankton communities in the Iceland Basin. Global Biogeochemical Cycles, 23. GB3001. https://doi.org/10.1029/2008GB003410 <https://doi.org/10.1029/2008GB003410>
op_doi https://doi.org/10.1029/2008GB003410
container_title Global Biogeochemical Cycles
container_volume 23
container_issue 3
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