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The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean
The availability of iron (Fe) can seasonally limit phytoplankton growth in the High Latitude North Atlantic (HLNA), greatly reducing the efficiency of the biological carbon pump. However, the spatial extent of seasonal iron limitation is not yet known. We present autumn nutrient and dissolved Fe mea...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6363741/ https://www.ncbi.nlm.nih.gov/pubmed/30723260 http://dx.doi.org/10.1038/s41598-018-37436-3 |
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author | Birchill, A. J. Hartner, N. T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S. J. Worsfold, P. J. Leopold, K. Painter, S. C. Lohan, M. C. |
author_facet | Birchill, A. J. Hartner, N. T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S. J. Worsfold, P. J. Leopold, K. Painter, S. C. Lohan, M. C. |
author_sort | Birchill, A. J. |
collection | PubMed |
description | The availability of iron (Fe) can seasonally limit phytoplankton growth in the High Latitude North Atlantic (HLNA), greatly reducing the efficiency of the biological carbon pump. However, the spatial extent of seasonal iron limitation is not yet known. We present autumn nutrient and dissolved Fe measurements, combined with microphytoplankton distribution, of waters overlying the Hebridean (Scottish) shelf break. A distinct biogeochemical divide was observed, with Fe deficient surface waters present beyond the shelf break, much further eastwards than previously recognised. Due to along and on-shelf circulation, the Hebridean shelf represents a much-localised source of Fe, which does not fertilise the wider HLNA. Shelf sediments are generally thought to supply large quantities of Fe to overlying waters. However, for this Fe to influence upper-ocean biogeochemical cycling, efficient off-shelf transport mechanisms are required. This work challenges the view that the oceanic surface waters in close proximity to continental margins are iron replete with respect to marine primary production demands. |
format | Online Article Text |
id | pubmed-6363741 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-63637412019-02-07 The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean Birchill, A. J. Hartner, N. T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S. J. Worsfold, P. J. Leopold, K. Painter, S. C. Lohan, M. C. Sci Rep Article The availability of iron (Fe) can seasonally limit phytoplankton growth in the High Latitude North Atlantic (HLNA), greatly reducing the efficiency of the biological carbon pump. However, the spatial extent of seasonal iron limitation is not yet known. We present autumn nutrient and dissolved Fe measurements, combined with microphytoplankton distribution, of waters overlying the Hebridean (Scottish) shelf break. A distinct biogeochemical divide was observed, with Fe deficient surface waters present beyond the shelf break, much further eastwards than previously recognised. Due to along and on-shelf circulation, the Hebridean shelf represents a much-localised source of Fe, which does not fertilise the wider HLNA. Shelf sediments are generally thought to supply large quantities of Fe to overlying waters. However, for this Fe to influence upper-ocean biogeochemical cycling, efficient off-shelf transport mechanisms are required. This work challenges the view that the oceanic surface waters in close proximity to continental margins are iron replete with respect to marine primary production demands. Nature Publishing Group UK 2019-02-05 /pmc/articles/PMC6363741/ /pubmed/30723260 http://dx.doi.org/10.1038/s41598-018-37436-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Birchill, A. J. Hartner, N. T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S. J. Worsfold, P. J. Leopold, K. Painter, S. C. Lohan, M. C. The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title | The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_full | The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_fullStr | The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_full_unstemmed | The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_short | The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_sort | eastern extent of seasonal iron limitation in the high latitude north atlantic ocean |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6363741/ https://www.ncbi.nlm.nih.gov/pubmed/30723260 http://dx.doi.org/10.1038/s41598-018-37436-3 |
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