@article{fdi:010088576,
  title = {{P}lankton community structure in response to hydrothermal iron inputs along the {T}onga-{K}ermadec arc},
  author = {{M}{\'e}riguet, {Z}. and {V}ilain, {M}. and {B}audena, {A}. and {T}illiette, {C}. and {H}abasque, {J}{\'e}r{\'e}mie and {L}ebourges {D}haussy, {A}nne and {B}hairy, {N}. and {G}uieu, {C}. and {B}onnet, {S}ophie and {L}ombard, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {W}estern {T}ropical {S}outh {P}acific ({WTSP}) basin has been identified as a hotspot of atmospheric dinitrogen fixation due to the high dissolved iron ([{DF}e]) concentrations (up to 66 n{M}) in the photic layer linked with the release of shallow hydrothermal fluids along the {T}onga-{K}ermadec arc. {Y}et, the effect of such hydrothermal fluids in structuring the plankton community remains poorly studied. {D}uring the {TONGA} cruise ({N}ovember-{D}ecember 2019), we collected micro- (20-200 mu m) and meso-plankton (>200 mu m) samples in the photic layer (0-200 m) along a west to east zonal transect crossing the {T}onga volcanic arc, in particular two volcanoes associated with shallow hydrothermal vents (< 500 m) in the {L}au {B}asin, and both sides of the arc represented by {M}elanesian waters and the {S}outh {P}acific {G}yre. {S}amples were analyzed by quantitative imaging ({F}low{C}am and {Z}oo{S}can) and then coupled with acoustic observations, allowing us to study the potential transfer of phytoplankton blooms to higher planktonic trophic levels. {W}e show that micro- and meso-plankton exhibit high abundances and biomasses in the {L}au {B}asin and, to some extent, in {M}elanesian waters, suggesting that shallow hydrothermal inputs sustain the planktonic food web, creating productive waters in this otherwise oligotrophic region. {I}n terms of planktonic community structure, we identified major changes with high [{DF}e] inputs, promoting the development of a low diversity planktonic community dominated by diazotrophic cyanobacteria. {F}urthermore, in order to quantify the effect of the shallow hydrothermal vents on chlorophyll a concentrations, we used {L}agrangian dispersal models. {W}e show that chlorophyll a concentrations were significantly higher inside the {L}agrangian plume, which came into contact with the two hydrothermal sites, confirming the profound impact of shallow hydrothermal vents on plankton production.},
  keywords = {plankton imaging ; diazotrophic cyanobacteria ; iron fertilization ; nutrient limitation ; {WTSP} ; {PACIFIQUE} ; {TONGA} ; {KERMADEC}},
  booktitle = {},
  journal = {{F}rontiers in {M}arine {S}cience},
  volume = {10},
  numero = {},
  pages = {1232923 [19 ]},
  year = {2023},
  DOI = {10.3389/fmars.2023.1232923},
  URL = {https://www.documentation.ird.fr/hor/fdi:010088576},
}