@article{fdi:010091142,
  title = {{F}ronts divide diazotroph communities in the {S}outhern {I}ndian {O}cean},
  author = {{C}howdhury, {S}. and {B}erthelot, {H}. and {B}audet, {C}. and {G}onzalez-{S}antana, {D}. and {R}eeder, {C}. {F}. and {L}'{H}elguen, {S}. and {M}aguer, {J}. {F}. and {L}oescher, {C}. {R}. and {S}ingh, {A}. and {B}lain, {S}. and {C}assar, {N}. and {B}onnet, {S}ophie and {P}lanquette, {H}. and {B}enavides, {M}ar},
  editor = {},
  language = {{ENG}},
  abstract = {{D}initrogen ({N}-2) fixation represents a key source of reactive nitrogen in marine ecosystems. {W}hile the process has been rather well-explored in low latitudes of the {A}tlantic and {P}acific {O}ceans, other higher latitude regions and particularly the {I}ndian {O}cean have been chronically overlooked. {H}ere, we characterize {N}-2 fixation and diazotroph community composition across nutrient and trace metals gradients spanning the multifrontal system separating the oligotrophic waters of the {I}ndian {O}cean subtropical gyre from the high nutrient low chlorophyll waters of the {S}outhern {O}cean. {W}e found a sharp contrasting distribution of diazotroph groups across the frontal system. {N}otably, cyanobacterial diazotrophs dominated north of fronts, driving high {N}-2 fixation rates (up to 13.96 nmol {N} l(-1) d(-1)) with notable peaks near the {S}outh {A}frican coast. {S}outh of the fronts non-cyanobacterial diazotrophs prevailed without significant {N}-2 fixation activity being detected. {O}ur results provide new crucial insights into high latitude diazotrophy in the {I}ndian {O}cean, which should contribute to improved climate model parameterization and enhanced constraints on global net primary productivity projections.},
  keywords = {fronts ; {HNLC} ; {N}-2 fixation ; noncyanobacterial diazotrophs ; subtropical ; gyre ; trace metals ; {OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{FEMS} {M}icrobiology {E}cology},
  volume = {100},
  numero = {8},
  pages = {fiae095 [13 p.]},
  ISSN = {0168-6496},
  year = {2024},
  DOI = {10.1093/femsec/fiae095},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091142},
}