@article{fdi:010072545,
  title = {{B}iological in situ nitrogen fixation by an {A}cacia species reaches optimal rates on extremely contrasted soils},
  author = {{V}incent, {B}. and {J}ourand, {P}hilippe and {J}uillot, {F}. and {D}ucousso, {M}. and {G}aliana, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}cacia spirorbis subsp. spirorbis {L}abill. is a legume tree that grows on calcareous, metalliferous and siliceous soils and is endemic to {N}ew {C}aledonia. {T}he present study assesses the nitrogen-fixing potential of {A}. spirorbis in its contrasted natural environments. {S}oil samples, the leaves of {A}. spirorbis and of co-occurring non-{N}2-fixing reference plant species were collected from nine study sites across {N}ew {C}aledonia. {S}oil properties were analyzed by {ICP}-{AES}. {N}itrogen ({N}) content and natural 15{N} abundance (δ15{N}) were measured in {A}. spirorbis and in reference plants. {T}he percentage of {N} derived from the atmosphere (%{N}dfa) fixed by {A}. spirorbis was also assessed and correlated with soil parameters. {R}emarkably, mean {N} contents in {A}. spirorbis showed no significant differences whatever the soil categories (20.2 ± 3.5 g kg−1) whereas major differences were found in {N} contents in the reference plants. {T}he average δ15{N} value of {A}. spirorbis was close to zero (+0.29‰), while that of the reference species ranged from −4.83 to +7.05‰. {I}n eight of the nine sites studied, {A}. spirorbis %{N}dfa was above 70%, regardless of the soil category. {U}nlike in the reference species, no statistical correlations were found between {A}. spirorbis {N} content and δ15{N} abundance and soil parameters. {D}espite the difficulty of using the δ15{N} abundance method in such contrasted environments, the resulting data show that {A}. spirorbis has the highest {N}2-fixing potential yet recorded in the genus {A}cacia and its nitrogen fixation is effective almost throughout its natural range.},
  keywords = {{NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{E}uropean {J}ournal of {S}oil {B}iology},
  volume = {86},
  numero = {},
  pages = {52--62},
  ISSN = {1164-5563},
  year = {2018},
  DOI = {10.1016/j.ejsobi.2018.03.003},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072545},
}