Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation
Marine diazotrophs convert dinitrogen (N2) gas into bioavailable nitrogen (N), supporting life in the global ocean. In 2012, the first version of the global oceanic diazotroph database (version 1) was published. Here, we present an updated version of the database (version 2), significantly increasin...
Published in: | Earth System Science Data |
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ODU Digital Commons
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Online Access: | https://digitalcommons.odu.edu/oeas_fac_pubs/489 https://doi.org/10.5194/essd-15-3673-2023 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1500/viewcontent/Mulholland_2023_GlobalOceanicDiazotrophDatabaseOCR.pdf |
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1500 2023-12-10T09:51:51+01:00 Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation Shao, Zhibo Xu, Yangchun Wang, Hua Luo, Weicheng Wang, Lice Huang, Yuhong Agawin, Nona Sheila R. Ahmed, Ayaz Benavides, Mar Bentzon-Tilia, Mikkel Berman-Frank, Ilana Berthelot, Hugo Biegala, Isabelle C. Bif, Mariana B. Bode, Antonio Bonnet, Sophie Bronk, Deborah A. Brown, Mark V. Campbell, Lisa Luo, Ya-Wei 2023-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/489 https://doi.org/10.5194/essd-15-3673-2023 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1500/viewcontent/Mulholland_2023_GlobalOceanicDiazotrophDatabaseOCR.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/489 doi:10.5194/essd-15-3673-2023 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1500/viewcontent/Mulholland_2023_GlobalOceanicDiazotrophDatabaseOCR.pdf © The Authors 2023. This work is distributed under the Commons Attribution 4.0 International (CC BY 4.0) License . OES Faculty Publications Dinotrogen Fixation Diazotrophs N2 Global oceanic diazotrophic database New measurements South Pacific Ocean Uncertainty N2 fixation rates Climate Environmental Chemistry Oceanography article 2023 ftolddominionuni https://doi.org/10.5194/essd-15-3673-2023 2023-11-13T19:09:43Z Marine diazotrophs convert dinitrogen (N2) gas into bioavailable nitrogen (N), supporting life in the global ocean. In 2012, the first version of the global oceanic diazotroph database (version 1) was published. Here, we present an updated version of the database (version 2), significantly increasing the number of in situ diazotrophic measurements from 13 565 to 55 286. Data points for N2 fixation rates, diazotrophic cell abundance, and nifH gene copy abundance have increased by 184 %, 86 %, and 809 %, respectively. Version 2 includes two new data sheets for the nifH gene copy abundance of non-cyanobacterial diazotrophs and cell-specific N2 fixation rates. The measurements of N2 fixation rates approximately follow a log-normal distribution in both version 1 and version 2. However, version 2 considerably extends both the left and right tails of the distribution. Consequently, when estimating global oceanic N2 fixation rates using the geometric means of different ocean basins, version 1 and version 2 yield similar rates (43–57 versus 45–63 Tg N yr−1; ranges based on one geometric standard error). In contrast, when using arithmetic means, version 2 suggests a significantly higher rate of 223±30 Tg N yr−1 (mean ± standard error; same hereafter) compared to version 1 (74±7 Tg N yr−1). Specifically, substantial rate increases are estimated for the South Pacific Ocean (88±23 versus 20±2 Tg N yr−1), primarily driven by measurements in the southwestern subtropics, and for the North Atlantic Ocean (40±9 versus 10±2 Tg N yr−1). Moreover, version 2 estimates the N2 fixation rate in the Indian Ocean to be 35±14 Tg N yr−1, which could not be estimated using version 1 due to limited data availability. Furthermore, a comparison of N2 fixation rates obtained through different measurement methods at the same months, locations, and depths reveals that the conventional 15N2 bubble method yields lower rates in 69 % cases compared to the new 15N2 dissolution method. This updated version of the database can facilitate future studies ... Article in Journal/Newspaper North Atlantic Old Dominion University: ODU Digital Commons Pacific Indian Earth System Science Data 15 8 3673 3709 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Dinotrogen Fixation Diazotrophs N2 Global oceanic diazotrophic database New measurements South Pacific Ocean Uncertainty N2 fixation rates Climate Environmental Chemistry Oceanography |
spellingShingle |
Dinotrogen Fixation Diazotrophs N2 Global oceanic diazotrophic database New measurements South Pacific Ocean Uncertainty N2 fixation rates Climate Environmental Chemistry Oceanography Shao, Zhibo Xu, Yangchun Wang, Hua Luo, Weicheng Wang, Lice Huang, Yuhong Agawin, Nona Sheila R. Ahmed, Ayaz Benavides, Mar Bentzon-Tilia, Mikkel Berman-Frank, Ilana Berthelot, Hugo Biegala, Isabelle C. Bif, Mariana B. Bode, Antonio Bonnet, Sophie Bronk, Deborah A. Brown, Mark V. Campbell, Lisa Luo, Ya-Wei Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation |
topic_facet |
Dinotrogen Fixation Diazotrophs N2 Global oceanic diazotrophic database New measurements South Pacific Ocean Uncertainty N2 fixation rates Climate Environmental Chemistry Oceanography |
description |
Marine diazotrophs convert dinitrogen (N2) gas into bioavailable nitrogen (N), supporting life in the global ocean. In 2012, the first version of the global oceanic diazotroph database (version 1) was published. Here, we present an updated version of the database (version 2), significantly increasing the number of in situ diazotrophic measurements from 13 565 to 55 286. Data points for N2 fixation rates, diazotrophic cell abundance, and nifH gene copy abundance have increased by 184 %, 86 %, and 809 %, respectively. Version 2 includes two new data sheets for the nifH gene copy abundance of non-cyanobacterial diazotrophs and cell-specific N2 fixation rates. The measurements of N2 fixation rates approximately follow a log-normal distribution in both version 1 and version 2. However, version 2 considerably extends both the left and right tails of the distribution. Consequently, when estimating global oceanic N2 fixation rates using the geometric means of different ocean basins, version 1 and version 2 yield similar rates (43–57 versus 45–63 Tg N yr−1; ranges based on one geometric standard error). In contrast, when using arithmetic means, version 2 suggests a significantly higher rate of 223±30 Tg N yr−1 (mean ± standard error; same hereafter) compared to version 1 (74±7 Tg N yr−1). Specifically, substantial rate increases are estimated for the South Pacific Ocean (88±23 versus 20±2 Tg N yr−1), primarily driven by measurements in the southwestern subtropics, and for the North Atlantic Ocean (40±9 versus 10±2 Tg N yr−1). Moreover, version 2 estimates the N2 fixation rate in the Indian Ocean to be 35±14 Tg N yr−1, which could not be estimated using version 1 due to limited data availability. Furthermore, a comparison of N2 fixation rates obtained through different measurement methods at the same months, locations, and depths reveals that the conventional 15N2 bubble method yields lower rates in 69 % cases compared to the new 15N2 dissolution method. This updated version of the database can facilitate future studies ... |
format |
Article in Journal/Newspaper |
author |
Shao, Zhibo Xu, Yangchun Wang, Hua Luo, Weicheng Wang, Lice Huang, Yuhong Agawin, Nona Sheila R. Ahmed, Ayaz Benavides, Mar Bentzon-Tilia, Mikkel Berman-Frank, Ilana Berthelot, Hugo Biegala, Isabelle C. Bif, Mariana B. Bode, Antonio Bonnet, Sophie Bronk, Deborah A. Brown, Mark V. Campbell, Lisa Luo, Ya-Wei |
author_facet |
Shao, Zhibo Xu, Yangchun Wang, Hua Luo, Weicheng Wang, Lice Huang, Yuhong Agawin, Nona Sheila R. Ahmed, Ayaz Benavides, Mar Bentzon-Tilia, Mikkel Berman-Frank, Ilana Berthelot, Hugo Biegala, Isabelle C. Bif, Mariana B. Bode, Antonio Bonnet, Sophie Bronk, Deborah A. Brown, Mark V. Campbell, Lisa Luo, Ya-Wei |
author_sort |
Shao, Zhibo |
title |
Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation |
title_short |
Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation |
title_full |
Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation |
title_fullStr |
Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation |
title_full_unstemmed |
Global Oceanic Diazotroph Database Version 2 and Elevated Estimate of Global N 2 Fixation |
title_sort |
global oceanic diazotroph database version 2 and elevated estimate of global n 2 fixation |
publisher |
ODU Digital Commons |
publishDate |
2023 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/489 https://doi.org/10.5194/essd-15-3673-2023 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1500/viewcontent/Mulholland_2023_GlobalOceanicDiazotrophDatabaseOCR.pdf |
geographic |
Pacific Indian |
geographic_facet |
Pacific Indian |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/489 doi:10.5194/essd-15-3673-2023 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1500/viewcontent/Mulholland_2023_GlobalOceanicDiazotrophDatabaseOCR.pdf |
op_rights |
© The Authors 2023. This work is distributed under the Commons Attribution 4.0 International (CC BY 4.0) License . |
op_doi |
https://doi.org/10.5194/essd-15-3673-2023 |
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