Basin-wide N2 fixation in the deep waters of the Mediterranean Sea
Benavides, Mar. et al.-- 10 pages, 2 figures, 2 tables, supporting information https://dx.doi.org/10.1002/2015GB005326 Recent findings indicate that N2 fixation is significant in aphotic waters, presumably due to heterotrophic diazotrophs depending on organic matter for their nutrition. However, the...
Published in: | Global Biogeochemical Cycles |
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American Geophysical Union
2016
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Online Access: | http://hdl.handle.net/10261/135418 https://doi.org/10.1002/2015GB005326 https://doi.org/10.13039/501100001738 https://doi.org/10.13039/501100000782 https://doi.org/10.13039/501100003339 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/100012947 |
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ftcsic:oai:digital.csic.es:10261/135418 2024-02-11T10:06:41+01:00 Basin-wide N2 fixation in the deep waters of the Mediterranean Sea Benavides, Mar Martínez-Pérez, Alba María Nieto-Cid, Mar Álvarez-Salgado, Xosé Antón Gasol, Josep M. Arístegui, Javier Haut Conseil pour la Science et la Technologie (France) Ministry of Science, Technology and Space (Israel) European Science Foundation Consejo Superior de Investigaciones Científicas (España) Ministerio de Economía y Competitividad (España) European Commission Institut de Recherche pour le Développement (France) 2016-06 http://hdl.handle.net/10261/135418 https://doi.org/10.1002/2015GB005326 https://doi.org/10.13039/501100001738 https://doi.org/10.13039/501100000782 https://doi.org/10.13039/501100003339 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/100012947 unknown American Geophysical Union #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/625185 Publisher's version https://dx.doi.org/10.1002/2015GB005326 Sí doi:10.1002/2015GB005326 issn: 0886-6236 e-issn: 1944-9224 Global Biogeochemical Cycles 30(6): 952-961 (2016) http://hdl.handle.net/10261/135418 http://dx.doi.org/10.13039/501100001738 http://dx.doi.org/10.13039/501100000782 http://dx.doi.org/10.13039/501100003339 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/100012947 open artículo http://purl.org/coar/resource_type/c_6501 2016 ftcsic https://doi.org/10.1002/2015GB00532610.13039/50110000173810.13039/50110000078210.13039/50110000333910.13039/50110000332910.13039/50110000078010.13039/100012947 2024-01-16T10:16:47Z Benavides, Mar. et al.-- 10 pages, 2 figures, 2 tables, supporting information https://dx.doi.org/10.1002/2015GB005326 Recent findings indicate that N2 fixation is significant in aphotic waters, presumably due to heterotrophic diazotrophs depending on organic matter for their nutrition. However, the relationship between organic matter and heterotrophic N2 fixation remains unknown. Here we explore N2 fixation in the deep chlorophyll maximum and underneath deep waters across the whole Mediterranean Sea and relate it to organic matter composition, characterized by optical and molecular methods. Our N2 fixation rates were in the range of those previously reported for the euphotic zone of the Mediterranean Sea (up to 0.43 nmol N L−1 d−1) and were significantly correlated to the presence of relatively labile organic matter with fluorescence and molecular formula properties representative for peptides and unsaturated aliphatics and associated with the presence of more oxygenated ventilated water masses. Finally, and despite that the aphotic N2 fixation contributes largely to total water column diazotrophic activity (>50%), its contribution to overall nitrogen inputs to the basin is negligible (<0.5%) This work was supported by project HOTMIX—“Dark-ocean water mass boundaries and mixing zones as “hot-spots” of biodiversity and biogeochemical fluxes across the Mediterranean Sea and Eastern North Atlantic”—(CTM2011-30010-C02-01 and CTM2011-30010-C02-02) to J.A., X.A.A.S., and J.M.G. M.B. was funded by the Marie Sklodowska-Curie Actions of the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement 625185. S.B. was funded by the Institut de Recherche pour le Développement (IRD). A.M.M.-P. was funded by FPI and short stay fellowships from the Spanish Ministry of Economy and Competitiveness. M.N.-C. was supported by the CSIC Program “Junta para la Ampliación de Estudios” cofinanced by the ESF. I.B-F. was supported by a collaborative grant with S.B. from MOST Israel and the High Council ... Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Benavides ENVELOPE(-58.267,-58.267,-63.933,-63.933) Global Biogeochemical Cycles 30 6 952 961 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
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ftcsic |
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description |
Benavides, Mar. et al.-- 10 pages, 2 figures, 2 tables, supporting information https://dx.doi.org/10.1002/2015GB005326 Recent findings indicate that N2 fixation is significant in aphotic waters, presumably due to heterotrophic diazotrophs depending on organic matter for their nutrition. However, the relationship between organic matter and heterotrophic N2 fixation remains unknown. Here we explore N2 fixation in the deep chlorophyll maximum and underneath deep waters across the whole Mediterranean Sea and relate it to organic matter composition, characterized by optical and molecular methods. Our N2 fixation rates were in the range of those previously reported for the euphotic zone of the Mediterranean Sea (up to 0.43 nmol N L−1 d−1) and were significantly correlated to the presence of relatively labile organic matter with fluorescence and molecular formula properties representative for peptides and unsaturated aliphatics and associated with the presence of more oxygenated ventilated water masses. Finally, and despite that the aphotic N2 fixation contributes largely to total water column diazotrophic activity (>50%), its contribution to overall nitrogen inputs to the basin is negligible (<0.5%) This work was supported by project HOTMIX—“Dark-ocean water mass boundaries and mixing zones as “hot-spots” of biodiversity and biogeochemical fluxes across the Mediterranean Sea and Eastern North Atlantic”—(CTM2011-30010-C02-01 and CTM2011-30010-C02-02) to J.A., X.A.A.S., and J.M.G. M.B. was funded by the Marie Sklodowska-Curie Actions of the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement 625185. S.B. was funded by the Institut de Recherche pour le Développement (IRD). A.M.M.-P. was funded by FPI and short stay fellowships from the Spanish Ministry of Economy and Competitiveness. M.N.-C. was supported by the CSIC Program “Junta para la Ampliación de Estudios” cofinanced by the ESF. I.B-F. was supported by a collaborative grant with S.B. from MOST Israel and the High Council ... |
author2 |
Haut Conseil pour la Science et la Technologie (France) Ministry of Science, Technology and Space (Israel) European Science Foundation Consejo Superior de Investigaciones Científicas (España) Ministerio de Economía y Competitividad (España) European Commission Institut de Recherche pour le Développement (France) |
format |
Article in Journal/Newspaper |
author |
Benavides, Mar Martínez-Pérez, Alba María Nieto-Cid, Mar Álvarez-Salgado, Xosé Antón Gasol, Josep M. Arístegui, Javier |
spellingShingle |
Benavides, Mar Martínez-Pérez, Alba María Nieto-Cid, Mar Álvarez-Salgado, Xosé Antón Gasol, Josep M. Arístegui, Javier Basin-wide N2 fixation in the deep waters of the Mediterranean Sea |
author_facet |
Benavides, Mar Martínez-Pérez, Alba María Nieto-Cid, Mar Álvarez-Salgado, Xosé Antón Gasol, Josep M. Arístegui, Javier |
author_sort |
Benavides, Mar |
title |
Basin-wide N2 fixation in the deep waters of the Mediterranean Sea |
title_short |
Basin-wide N2 fixation in the deep waters of the Mediterranean Sea |
title_full |
Basin-wide N2 fixation in the deep waters of the Mediterranean Sea |
title_fullStr |
Basin-wide N2 fixation in the deep waters of the Mediterranean Sea |
title_full_unstemmed |
Basin-wide N2 fixation in the deep waters of the Mediterranean Sea |
title_sort |
basin-wide n2 fixation in the deep waters of the mediterranean sea |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/135418 https://doi.org/10.1002/2015GB005326 https://doi.org/10.13039/501100001738 https://doi.org/10.13039/501100000782 https://doi.org/10.13039/501100003339 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/100012947 |
long_lat |
ENVELOPE(-58.267,-58.267,-63.933,-63.933) |
geographic |
Benavides |
geographic_facet |
Benavides |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/625185 Publisher's version https://dx.doi.org/10.1002/2015GB005326 Sí doi:10.1002/2015GB005326 issn: 0886-6236 e-issn: 1944-9224 Global Biogeochemical Cycles 30(6): 952-961 (2016) http://hdl.handle.net/10261/135418 http://dx.doi.org/10.13039/501100001738 http://dx.doi.org/10.13039/501100000782 http://dx.doi.org/10.13039/501100003339 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/100012947 |
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open |
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https://doi.org/10.1002/2015GB00532610.13039/50110000173810.13039/50110000078210.13039/50110000333910.13039/50110000332910.13039/50110000078010.13039/100012947 |
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Global Biogeochemical Cycles |
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