%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Chowdhury, S.
%A Raes, E.
%A Horstmann, C.
%A Ahmed, A.
%A Ridame, C.
%A Metzl, N.
%A Bhavya, P. S.
%A Sato, T.
%A Shiozaki, T.
%A Bonnet, Sophie
%A Loscher, C. R.
%A Singh, A.
%A Benavides, Mar
%T Diazotrophy in the Indian Ocean : current understanding and future perspectives
%D 2023
%L fdi:010090207
%G ENG
%J Limnology and Oceanography Letters
%K OCEAN INDIEN
%M ISI:001060102900001
%P [16 ]
%R 10.1002/lol2.10343
%U https://www.documentation.ird.fr/hor/fdi:010090207
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2023-10/010090207.pdf
%V [Early access]
%W Horizon (IRD)
%X Dinitrogen (N-2) fixation provides the major source of reactive nitrogen in the open ocean, sustaining biological productivity. The Indian Ocean (IO) covers 22% of the ocean surface, while it only represents 1% of the global diazotroph database. Hence, constraining the sources of nitrogen in the IO is crucial. Here, we compile three decades of N-2 fixation and diazotroph DNA data in the IO. Our analysis reveals basin-scale yearly rates between similar to 7 and 13 Tg N yr(-1). These rates are in the range of previous modeling-based estimates but may represent a lower bound estimate due to the lack of data in this basin. Diazotroph variability among sub-basins may suggest endemicity but needs to be taken with caution due to biased sampling toward certain seasons and uneven spatial coverage. We provide recommendations for a more accurate representation of the IO in the global nitrogen budget and our knowledge of diazotroph biogeography.
%$ 034 ; 084