TY - JOUR

T1 - Global oceanic diazotroph database version 2 and elevated estimate of global oceanic N2 fixation

AU - Shao, Zhibo

AU - Xu, Yangchun

AU - Wang, Hua

AU - Luo, Weicheng

AU - Wang, Lice

AU - Huang, Yuhong

AU - Agawin, Nona Sheila R.

AU - Ahmed, Ayaz

AU - Benavides, Mar

AU - Bentzon-Tilia, Mikkel

AU - Berman-Frank, Ilana

AU - Berthelot, Hugo

AU - C. Biegala, Isabelle

AU - B. Bif, Mariana

AU - Bode, Antonio

AU - Bonnet, Sophie

AU - A. Bronk, Deborah

AU - Brown, Mark V.

AU - Campbell, Lisa

AU - G. Capone, Douglas

AU - J. Carpenter, Edward

AU - Cassar, Nicolas

AU - X. Chang, Bonnie

AU - Chappell, Dreux

AU - Lee Chen, Yuh-ling

AU - Church, Matthew J

AU - M. Cornejo-Castillo, Francisco

AU - Sacilotto Detoni, Amália Maria

AU - C. Doney, Scott

AU - Dupouy, Cécile

AU - Estrada, Marta

AU - Fernandez, Camilla

AU - Fernández-Castro, Bieito

AU - Fonseca-Batista, Debany

AU - Foster, Rachel Ann

AU - Furuya, Ken

AU - Garcia, Nicole

AU - Goto, Kanji

AU - Gago, Jesús

AU - R. Gradoville, Mary

AU - Hamersley, M. Robert

AU - A. Henke, Britt

AU - Hörstmann, Cora

AU - Jayakumar, Amal

AU - Jiang, Zhibing

AU - Kao, Shuh-Ji

AU - Karl, David M

AU - R. Kittu, Leila

AU - N. Knapp, Angela

AU - Kumar, Sanjeev

AU - LaRoche, Julie

AU - Liu, Hongbin

AU - Liu, Jiaxing

AU - Lory, Caroline

AU - Loscher, Carolin R.

AU - Marañón, Emilio

AU - F. Messer, Lauren

AU - M. Mills, Matthew

AU - Mohr, Wiebke

AU - Moisander, Pia H.

AU - Mahaffey, Claire

AU - Moore, Robert

AU - Mouriño-Carballido, Beatriz

AU - R. Mulholland, Margaret

AU - Nakaoka, Shin-ichiro

AU - A. Needoba, Joseph

AU - J. Raes, Eric

AU - Rahav, Eyal

AU - Ramírez-Cárdenas, Teodoro

AU - Reeder, Christian Furbo

AU - Riemann, Lasse

AU - Riou, Virginie

AU - Robidart, Julie C

AU - V. S. S. Sarma, Vedula

AU - Sato, Takuya

AU - Saxena, Himanshu

AU - Selden, Corday

AU - Seymour, Justin R.

AU - Shi, Dalin

AU - Shiozaki, Takuhei

AU - Singh, Arvind

AU - E. Sipler, Rachel

AU - Sun, Jun

AU - Suzuki, Koji

AU - Takahasi, Kazutaka

AU - Tan, Yehui

AU - Tang, Weiyi

AU - Tremblay, Jean-Éric

AU - Turk-Kubo, Kendra

AU - Wen, Zuozhu

AU - White, Angelicque E

AU - Wilson, Samuel T.

AU - Yoshida, Takashi

AU - Zehr, Jonathan P.

AU - Zhang, Run

AU - Zhang, Yao

AU - Luo, Ya-Wei

PY - 2023

Y1 - 2023

N2 - 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 in marine ecology and biogeochemistry. The database is stored at the Figshare repository (https://doi.org/10.6084/m9.figshare.21677687; Shao et al., 2022).

AB - 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 in marine ecology and biogeochemistry. The database is stored at the Figshare repository (https://doi.org/10.6084/m9.figshare.21677687; Shao et al., 2022).

U2 - 10.5194/essd-15-3673-2023

DO - 10.5194/essd-15-3673-2023

M3 - Journal article

VL - 15

SP - 3673

EP - 3709

JO - Earth System Science Data

JF - Earth System Science Data

SN - 1866-3508

IS - 8

ER -