Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean
Diazotrophic dinitrogen (N2) fixation contributes ~76% to “new” nitrogen inputs to the sunlit open ocean, but environmental factors determining N2 fixation rates are not well constrained. Excess phosphate (phosphate–nitrate/16 > 0) and iron availability control N2 fixation rates in the eastern tr...
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ftunivtasmania:oai:eprints.utas.edu.au:30845 2023-05-15T17:29:27+02:00 Niche construction by non-diazotrophs for N2 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://eprints.utas.edu.au/30845/ https://eprints.utas.edu.au/30845/1/133666%20-%20Niche%20construction%20by%20non-diazotrophs%20for%20N2%20fixers.pdf en eng Amer Geophysical Union https://eprints.utas.edu.au/30845/1/133666%20-%20Niche%20construction%20by%20non-diazotrophs%20for%20N2%20fixers.pdf Singh, A, Bach, LT orcid:0000-0003-0202-3671 , Fischer, T, Hauss, H, Kiko, R, Paul, AJ, Stange, P, Vandromme, P and Riebesell, U 2017 , 'Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean' , Geophysical Research Letters, vol. 44, no. 13 , pp. 6904-6913 , doi:10.1002/2017GL074218 <http://dx.doi.org/10.1002/2017GL074218>. nitrogen fixation phytoplankton niche construction Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1002/2017GL074218 2021-09-13T22:20:09Z Diazotrophic dinitrogen (N2) fixation contributes ~76% to “new” nitrogen inputs to the sunlit open ocean, but environmental factors determining N2 fixation rates are not well constrained. Excess phosphate (phosphate–nitrate/16 > 0) and iron availability control N2 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 (8°N–15°N, 19°W–23°W) 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 (N2 fixers). Our observations may help to understand the prevalence of diazotrophy in low‐phosphate, oligotrophic regions. Article in Journal/Newspaper North Atlantic University of Tasmania: UTas ePrints Geophysical Research Letters 44 13 6904 6913 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
nitrogen fixation phytoplankton niche construction |
spellingShingle |
nitrogen fixation phytoplankton niche construction Singh, A Bach, LT Fischer, T Hauss, H Kiko, R Paul, AJ Stange, P Vandromme, P Riebesell, U Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean |
topic_facet |
nitrogen fixation phytoplankton niche construction |
description |
Diazotrophic dinitrogen (N2) fixation contributes ~76% to “new” nitrogen inputs to the sunlit open ocean, but environmental factors determining N2 fixation rates are not well constrained. Excess phosphate (phosphate–nitrate/16 > 0) and iron availability control N2 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 (8°N–15°N, 19°W–23°W) 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 (N2 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 N2 fixers in the eastern tropical North Atlantic Ocean |
title_short |
Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean |
title_full |
Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean |
title_fullStr |
Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean |
title_full_unstemmed |
Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean |
title_sort |
niche construction by non-diazotrophs for n2 fixers in the eastern tropical north atlantic ocean |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/30845/ https://eprints.utas.edu.au/30845/1/133666%20-%20Niche%20construction%20by%20non-diazotrophs%20for%20N2%20fixers.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://eprints.utas.edu.au/30845/1/133666%20-%20Niche%20construction%20by%20non-diazotrophs%20for%20N2%20fixers.pdf Singh, A, Bach, LT orcid:0000-0003-0202-3671 , Fischer, T, Hauss, H, Kiko, R, Paul, AJ, Stange, P, Vandromme, P and Riebesell, U 2017 , 'Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean' , Geophysical Research Letters, vol. 44, no. 13 , pp. 6904-6913 , doi:10.1002/2017GL074218 <http://dx.doi.org/10.1002/2017GL074218>. |
op_doi |
https://doi.org/10.1002/2017GL074218 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
13 |
container_start_page |
6904 |
op_container_end_page |
6913 |
_version_ |
1766123570279219200 |