Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean
Diazotrophic dinitrogen (N 2 ) fixation contributes ~76% to new nitrogen inputs to the sunlit open ocean, but environmental factors determining N 2 fixation rates are not well constrained. Excess phosphate (phosphatenitrate/16>0) and iron availability control N 2 fixation rates in the eastern tro...
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Online Access: | https://doi.org/10.1002/2017GL074218 http://ecite.utas.edu.au/133666 |
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ftunivtasecite:oai:ecite.utas.edu.au:133666 2023-05-15T17:29:30+02:00 Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean Singh, A Bach, LT Fischer, T Hauss, H Kiko, R Paul, AJ Stange, P Vandromme, P Riebesell, U 2017 application/pdf https://doi.org/10.1002/2017GL074218 http://ecite.utas.edu.au/133666 en eng Amer Geophysical Union http://ecite.utas.edu.au/133666/1/133666 - Niche construction by non-diazotrophs for N2 fixers.pdf http://dx.doi.org/10.1002/2017GL074218 Singh, A and Bach, LT and Fischer, T and Hauss, H and Kiko, R and Paul, AJ and Stange, P and Vandromme, P and Riebesell, U, Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean, Geophysical Research Letters, 44, (13) pp. 6904-6913. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/133666 Earth Sciences Oceanography Biological Oceanography Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1002/2017GL074218 2019-12-13T22:31:25Z Diazotrophic dinitrogen (N 2 ) fixation contributes ~76% to new nitrogen inputs to the sunlit open ocean, but environmental factors determining N 2 fixation rates are not well constrained. Excess phosphate (phosphatenitrate/16>0) and iron availability control N 2 fixation rates in the eastern tropical North Atlantic (ETNA), but it remains an open question how excess phosphate is generated within or supplied to the phosphate‐depleted sunlit layer. Our observations in the ETNA region (8N15N, 19W23W) suggest that Prochlorococcus and Synechococcus , the two ubiquitous non‐diazotrophic cyanobacteria with cellular N:P ratios higher than the Redfield ratio, create an environment of excess phosphate, which cannot be explained by diapycnal mixing, atmospheric, and riverine inputs. Thus, our results unveil a new biogeochemical niche construction mechanism by non‐diazotrophic cyanobacteria for their diazotrophic phylum group members (N 2 fixers). Our observations may help to understand the prevalence of diazotrophy in low‐phosphate, oligotrophic regions. Article in Journal/Newspaper North Atlantic eCite UTAS (University of Tasmania) Geophysical Research Letters 44 13 6904 6913 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
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English |
topic |
Earth Sciences Oceanography Biological Oceanography |
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Earth Sciences Oceanography Biological Oceanography Singh, A Bach, LT Fischer, T Hauss, H Kiko, R Paul, AJ Stange, P Vandromme, P Riebesell, U Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean |
topic_facet |
Earth Sciences Oceanography Biological Oceanography |
description |
Diazotrophic dinitrogen (N 2 ) fixation contributes ~76% to new nitrogen inputs to the sunlit open ocean, but environmental factors determining N 2 fixation rates are not well constrained. Excess phosphate (phosphatenitrate/16>0) and iron availability control N 2 fixation rates in the eastern tropical North Atlantic (ETNA), but it remains an open question how excess phosphate is generated within or supplied to the phosphate‐depleted sunlit layer. Our observations in the ETNA region (8N15N, 19W23W) suggest that Prochlorococcus and Synechococcus , the two ubiquitous non‐diazotrophic cyanobacteria with cellular N:P ratios higher than the Redfield ratio, create an environment of excess phosphate, which cannot be explained by diapycnal mixing, atmospheric, and riverine inputs. Thus, our results unveil a new biogeochemical niche construction mechanism by non‐diazotrophic cyanobacteria for their diazotrophic phylum group members (N 2 fixers). Our observations may help to understand the prevalence of diazotrophy in low‐phosphate, oligotrophic regions. |
format |
Article in Journal/Newspaper |
author |
Singh, A Bach, LT Fischer, T Hauss, H Kiko, R Paul, AJ Stange, P Vandromme, P Riebesell, U |
author_facet |
Singh, A Bach, LT Fischer, T Hauss, H Kiko, R Paul, AJ Stange, P Vandromme, P Riebesell, U |
author_sort |
Singh, A |
title |
Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean |
title_short |
Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean |
title_full |
Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean |
title_fullStr |
Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean |
title_full_unstemmed |
Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean |
title_sort |
niche construction by non-diazotrophs for n 2 fixers in the eastern tropical north atlantic ocean |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://doi.org/10.1002/2017GL074218 http://ecite.utas.edu.au/133666 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://ecite.utas.edu.au/133666/1/133666 - Niche construction by non-diazotrophs for N2 fixers.pdf http://dx.doi.org/10.1002/2017GL074218 Singh, A and Bach, LT and Fischer, T and Hauss, H and Kiko, R and Paul, AJ and Stange, P and Vandromme, P and Riebesell, U, Niche construction by non-diazotrophs for N 2 fixers in the eastern tropical North Atlantic Ocean, Geophysical Research Letters, 44, (13) pp. 6904-6913. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/133666 |
op_doi |
https://doi.org/10.1002/2017GL074218 |
container_title |
Geophysical Research Letters |
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44 |
container_issue |
13 |
container_start_page |
6904 |
op_container_end_page |
6913 |
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1766123645961240576 |