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dc.contributor.authorShao, Zhiboen_UK
dc.contributor.authorXu, Yangchunen_UK
dc.contributor.authorWang, Huaen_UK
dc.contributor.authorLuo, Weichengen_UK
dc.contributor.authorWang, Liceen_UK
dc.contributor.authorHuang, Yuhongen_UK
dc.contributor.authorAgawin, Nona Sheila Ren_UK
dc.contributor.authorAhmed, Ayazen_UK
dc.contributor.authorBenavides, Maren_UK
dc.contributor.authorBentzon-Tilia, Mikkelen_UK
dc.contributor.authorBerman-Frank, Ilanaen_UK
dc.contributor.authorBerthelot, Hugoen_UK
dc.contributor.authorBiegala, Isabelle Cen_UK
dc.contributor.authorBif, Mariana Ben_UK
dc.contributor.authorMesser, Lauren Fen_UK
dc.description.abstractMarine 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 in marine ecology and biogeochemistry. The database is stored at the Figshare repository (; Shao et al., 2022).en_UK
dc.publisherCopernicus Publicationsen_UK
dc.relationShao Z, Xu Y, Wang H, Luo W, Wang L, Huang Y, Agawin NSR, Ahmed A, Benavides M, Bentzon-Tilia M, Berman-Frank I, Berthelot H, Biegala IC, Bif MB & Messer LF (2023) Global oceanic diazotroph database version 2 and elevated estimate of global oceanic N 2 fixation. <i>Earth System Science Data</i>, 15 (8), pp. 3673-3709.
dc.rights© Author(s) 2023. This work is distributed under the Creative Commons Attribution 4.0 License.en_UK
dc.titleGlobal oceanic diazotroph database version 2 and elevated estimate of global oceanic N 2 fixationen_UK
dc.typeJournal Articleen_UK
dc.citation.jtitleEarth System Science Dataen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.funderAustralian Research Councilen_UK
dc.description.notesAdditional Authors: Antonio Bode, Sophie Bonnet, Deborah A. Bronk, Mark V. Brown, Lisa Campbell, Douglas G. Capone, Edward J. Carpenter, Nicolas Cassar, Bonnie X. Chang, Dreux Chappell, Yuh-ling Lee Chen, Matthew J. Church, Francisco M. Cornejo-Castillo, Amália Maria Sacilotto Detoni, Scott C. Doney, Cecile Dupouy, Marta Estrada, Camila Fernandez, Bieito Fernández-Castro, Debany Fonseca-Batista, Rachel A. Foster, Ken Furuya, Nicole Garcia, Kanji Goto, Jesús Gago, Mary R. Gradoville, M. Robert Hamersley, Britt A. Henke, Cora Hörstmann, Amal Jayakumar, Zhibing Jiang, Shuh-Ji Kao, David M. Karl, Leila R. Kittu, Angela N. Knapp, Sanjeev Kumar, Julie LaRoche, Hongbin Liu, Jiaxing Liu, Caroline Lory, Carolin R. Löscher, Emilio Marañón, Matthew M. Mills, Wiebke Mohr, Pia H. Moisander, Claire Mahaffey, Robert Moore, Beatriz Mouriño-Carballido, Margaret R. Mulholland, Shin-ichiro Nakaoka, Joseph A. Needoba, Eric J. Raes, Eyal Rahav, Teodoro Ramírez-Cárdenas, Christian Furbo Reeder, Lasse Riemann, Virginie Riou, Julie C. Robidart, Vedula V. S. S. Sarma, Takuya Sato, Himanshu Saxena, Corday Selden, Justin R. Seymour, Dalin Shi, Takuhei Shiozaki, Arvind Singh, Rachel E. Sipler, Jun Sun, Koji Suzuki, Kazutaka Takahashi, Yehui Tan, Weiyi Tang, Jean-Éric Tremblay, Kendra Turk-Kubo, Zuozhu Wen, Angelicque E. White, Samuel T. Wilson, Takashi Yoshida, Jonathan P. Zehr, Run Zhang, Yao Zhang, and Ya-Wei Luoen_UK
dc.contributor.affiliationXiamen Universityen_UK
dc.contributor.affiliationXiamen Universityen_UK
dc.contributor.affiliationXiamen Universityen_UK
dc.contributor.affiliationXiamen Universityen_UK
dc.contributor.affiliationXiamen Universityen_UK
dc.contributor.affiliationXiamen Universityen_UK
dc.contributor.affiliationUniversity of the Balearic Islandsen_UK
dc.contributor.affiliationKuwait Institute for Scientific Research (KISR)en_UK
dc.contributor.affiliationAix-Marseille Universityen_UK
dc.contributor.affiliationTechnical University of Denmarken_UK
dc.contributor.affiliationUniversity of Haifaen_UK
dc.contributor.affiliationAix-Marseille Universityen_UK
dc.contributor.affiliationMonterey Bay Aquarium Research Institute (MBARI)en_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorShao, Zhibo|en_UK
local.rioxx.authorXu, Yangchun|en_UK
local.rioxx.authorWang, Hua|en_UK
local.rioxx.authorLuo, Weicheng|en_UK
local.rioxx.authorWang, Lice|en_UK
local.rioxx.authorHuang, Yuhong|en_UK
local.rioxx.authorAgawin, Nona Sheila R|en_UK
local.rioxx.authorAhmed, Ayaz|en_UK
local.rioxx.authorBenavides, Mar|en_UK
local.rioxx.authorBentzon-Tilia, Mikkel|en_UK
local.rioxx.authorBerman-Frank, Ilana|en_UK
local.rioxx.authorBerthelot, Hugo|en_UK
local.rioxx.authorBiegala, Isabelle C|en_UK
local.rioxx.authorBif, Mariana B|en_UK
local.rioxx.authorMesser, Lauren F|0000-0002-8335-2807en_UK
local.rioxx.projectProject ID unknown|Australian Research Council|
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