New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods
Nitrogen availability limits marine productivity across large ocean regions. Diazotrophs can supply new nitrogen to the marine environment via nitrogen (N(2)) fixation, relieving nitrogen limitation. The distributions of diazotrophs and N(2) fixation have been hypothesized to be generally controlled...
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ftpubmed:oai:pubmedcentral.nih.gov:7490393 2023-05-15T17:31:19+02:00 New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods Tang, Weiyi Cerdán-García, Elena Berthelot, Hugo Polyviou, Despo Wang, Seaver Baylay, Alison Whitby, Hannah Planquette, Hélène Mowlem, Matthew Robidart, Julie Cassar, Nicolas 2020-06-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490393/ http://www.ncbi.nlm.nih.gov/pubmed/32581316 https://doi.org/10.1038/s41396-020-0703-6 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490393/ http://www.ncbi.nlm.nih.gov/pubmed/32581316 http://dx.doi.org/10.1038/s41396-020-0703-6 © The Author(s), under exclusive licence to International Society for Microbial Ecology 2020 ISME J Article Text 2020 ftpubmed https://doi.org/10.1038/s41396-020-0703-6 2021-10-03T00:23:05Z Nitrogen availability limits marine productivity across large ocean regions. Diazotrophs can supply new nitrogen to the marine environment via nitrogen (N(2)) fixation, relieving nitrogen limitation. The distributions of diazotrophs and N(2) fixation have been hypothesized to be generally controlled by temperature, phosphorus, and iron availability in the global ocean. However, even in the North Atlantic where most research on diazotrophs and N(2) fixation has taken place, environmental controls remain contentious. Here we measure diazotroph composition, abundance, and activity at high resolution using newly developed underway sampling and sensing techniques. We capture a diazotrophic community shift from Trichodesmium to UCYN-A between the oligotrophic, warm (25–29 °C) Sargasso Sea and relatively nutrient-enriched, cold (13–24 °C) subpolar and eastern American coastal waters. Meanwhile, N(2) fixation rates measured in this study are among the highest ever recorded globally and show significant increase with phosphorus availability across the transition from the Gulf Stream into subpolar and coastal waters despite colder temperatures and higher nitrate concentrations. Transcriptional patterns in both Trichodesmium and UCYN-A indicate phosphorus stress in the subtropical gyre. Over this iron-replete transect spanning the western North Atlantic, our results suggest that temperature is the major factor controlling the diazotrophic community structure while phosphorous drives N(2) fixation rates. Overall, the occurrence of record-high UCYN-A abundance and peak N(2) fixation rates in the cold coastal region where nitrate concentrations are highest (~200 nM) challenges current paradigms on what drives the distribution of diazotrophs and N(2) fixation. Text North Atlantic PubMed Central (PMC) The ISME Journal 14 10 2514 2526 |
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Article Tang, Weiyi Cerdán-García, Elena Berthelot, Hugo Polyviou, Despo Wang, Seaver Baylay, Alison Whitby, Hannah Planquette, Hélène Mowlem, Matthew Robidart, Julie Cassar, Nicolas New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods |
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Nitrogen availability limits marine productivity across large ocean regions. Diazotrophs can supply new nitrogen to the marine environment via nitrogen (N(2)) fixation, relieving nitrogen limitation. The distributions of diazotrophs and N(2) fixation have been hypothesized to be generally controlled by temperature, phosphorus, and iron availability in the global ocean. However, even in the North Atlantic where most research on diazotrophs and N(2) fixation has taken place, environmental controls remain contentious. Here we measure diazotroph composition, abundance, and activity at high resolution using newly developed underway sampling and sensing techniques. We capture a diazotrophic community shift from Trichodesmium to UCYN-A between the oligotrophic, warm (25–29 °C) Sargasso Sea and relatively nutrient-enriched, cold (13–24 °C) subpolar and eastern American coastal waters. Meanwhile, N(2) fixation rates measured in this study are among the highest ever recorded globally and show significant increase with phosphorus availability across the transition from the Gulf Stream into subpolar and coastal waters despite colder temperatures and higher nitrate concentrations. Transcriptional patterns in both Trichodesmium and UCYN-A indicate phosphorus stress in the subtropical gyre. Over this iron-replete transect spanning the western North Atlantic, our results suggest that temperature is the major factor controlling the diazotrophic community structure while phosphorous drives N(2) fixation rates. Overall, the occurrence of record-high UCYN-A abundance and peak N(2) fixation rates in the cold coastal region where nitrate concentrations are highest (~200 nM) challenges current paradigms on what drives the distribution of diazotrophs and N(2) fixation. |
format |
Text |
author |
Tang, Weiyi Cerdán-García, Elena Berthelot, Hugo Polyviou, Despo Wang, Seaver Baylay, Alison Whitby, Hannah Planquette, Hélène Mowlem, Matthew Robidart, Julie Cassar, Nicolas |
author_facet |
Tang, Weiyi Cerdán-García, Elena Berthelot, Hugo Polyviou, Despo Wang, Seaver Baylay, Alison Whitby, Hannah Planquette, Hélène Mowlem, Matthew Robidart, Julie Cassar, Nicolas |
author_sort |
Tang, Weiyi |
title |
New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods |
title_short |
New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods |
title_full |
New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods |
title_fullStr |
New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods |
title_full_unstemmed |
New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods |
title_sort |
new insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods |
publisher |
Nature Publishing Group UK |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490393/ http://www.ncbi.nlm.nih.gov/pubmed/32581316 https://doi.org/10.1038/s41396-020-0703-6 |
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North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISME J |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490393/ http://www.ncbi.nlm.nih.gov/pubmed/32581316 http://dx.doi.org/10.1038/s41396-020-0703-6 |
op_rights |
© The Author(s), under exclusive licence to International Society for Microbial Ecology 2020 |
op_doi |
https://doi.org/10.1038/s41396-020-0703-6 |
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The ISME Journal |
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14 |
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10 |
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2514 |
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2526 |
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1766128830960893952 |