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 degrees 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...
Published in: | Global Biogeochemical Cycles |
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Language: | English |
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AGU (American Geophysical Union)
2009
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Online Access: | https://oceanrep.geomar.de/id/eprint/23299/ https://oceanrep.geomar.de/id/eprint/23299/1/gbc1593.pdf https://doi.org/10.1029/2008GB003410 |
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ftoceanrep:oai:oceanrep.geomar.de:23299 2023-05-15T16:47:39+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 text https://oceanrep.geomar.de/id/eprint/23299/ https://oceanrep.geomar.de/id/eprint/23299/1/gbc1593.pdf https://doi.org/10.1029/2008GB003410 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/23299/1/gbc1593.pdf Nielsdóttir, M. C., Moore, C. M., Sanders, R., Hinz, D. J. and Achterberg, E. P. (2009) Iron limitation of the postbloom phytoplankton communities in the Iceland Basin. Global Biogeochemical Cycles, 23 (3). n/a-n/a. DOI 10.1029/2008GB003410 <https://doi.org/10.1029/2008GB003410>. doi:10.1029/2008GB003410 Article PeerReviewed 2009 ftoceanrep https://doi.org/10.1029/2008GB003410 2023-04-07T15:12:13Z Measurements performed on a cruise within the central Iceland Basin in the high-latitude (>55 degrees 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 mu M and in situ chlorophyll concentrations ranged from 0.2 to 0.4 mg m(-3). In vitro iron addition experiments demonstrated increased photosynthetic efficiencies (F(v)/F(m)) 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Global Biogeochemical Cycles 23 3 n/a n/a |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Measurements performed on a cruise within the central Iceland Basin in the high-latitude (>55 degrees 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 mu M and in situ chlorophyll concentrations ranged from 0.2 to 0.4 mg m(-3). In vitro iron addition experiments demonstrated increased photosynthetic efficiencies (F(v)/F(m)) 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 |
publisher |
AGU (American Geophysical Union) |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/23299/ https://oceanrep.geomar.de/id/eprint/23299/1/gbc1593.pdf https://doi.org/10.1029/2008GB003410 |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/23299/1/gbc1593.pdf Nielsdóttir, M. C., Moore, C. M., Sanders, R., Hinz, D. J. and Achterberg, E. P. (2009) Iron limitation of the postbloom phytoplankton communities in the Iceland Basin. Global Biogeochemical Cycles, 23 (3). n/a-n/a. DOI 10.1029/2008GB003410 <https://doi.org/10.1029/2008GB003410>. doi:10.1029/2008GB003410 |
op_doi |
https://doi.org/10.1029/2008GB003410 |
container_title |
Global Biogeochemical Cycles |
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23 |
container_issue |
3 |
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1766037726495244288 |