@article{fdi:010072839,
  title = {{D}istribution and rates of nitrogen fixation in the western tropical {S}outh {P}acific {O}cean constrained by nitrogen isotope budgets},
  author = {{K}napp, {A}. {N}. and {M}c{C}abe, {K}. {M}. and {G}rosso, {O}. and {L}eblond, {N}. and {M}outin, {T}. and {B}onnet, {S}ophie},
  editor = {},
  language = {{ENG}},
  abstract = {{C}onstraining the rates and spatial distribution of dinitrogen ({N}-2) fixation fluxes to the ocean informs our understanding of the environmental sensitivities of {N}-2 fixation as well as the timescale over which the fluxes of nitrogen ({N}) to and from the ocean may respond to each other. {H}ere we quantify rates of {N}-2 fixation as well as its contribution to export production along a zonal transect in the western tropical {S}outh {P}acific ({WTSP}) {O}cean using {N} isotope ("delta {N}-15") budgets. {C}omparing measurements of water column nitrate + nitrite delta {N}-15 with the delta {N}-15 of sinking particulate {N} at a western, central, and eastern station, these delta {N}-15 budgets indicate high, modest, and low rates of {N}-2 fixation at the respective stations. {T}he results also imply that {N}-2 fixation supports exceptionally high, i.e. >= 50 %, of export production at the western and central stations, which are also proximal to the largest iron sources. {T}hese geochemically based rates of {N}-2 fixation are equal to or greater than those previously reported in the tropical {N}orth {A}tlantic, indicating that the {WTSP} {O}cean has the capacity to support globally significant rates of {N}-2 fixation, which may compensate for {N} removal in the oxygen-deficient zones of the eastern tropical {P}acific.},
  keywords = {{PACIFIQUE} {SUD}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {15},
  numero = {9},
  pages = {2619--2628},
  ISSN = {1726-4170},
  year = {2018},
  DOI = {10.5194/bg-15-2619-2018},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072839},
}