@inproceedings{fdi:39883,
  title = {{C}omparison of in-bottle measurements using 15{N} and 14{C}},
  author = {{L}e {B}outeiller, {A}ubert},
  editor = {},
  language = {{ENG}},
  abstract = {{F}ield date reported in the literature are used for making a direct comparison between primary production estimated by the 14{C} method and nitrogen uptake measured by the 15{N} method (nitrate, ammonium and at times, urea). {C}/{N} uptake ratio values vary widely, from less than 1 to more than 20 (at/at), without any evident relationship with environmental properties or experimental procedure. {T}he mean uptake ratio calculated on the whole data set is found to be equal to 6.7 ( n = 99). {T}he question arises whether such as {C}/{N} ratio may be considered as the assimilation ratio. {F}or comparison purposes, the constituent ratio of phytoplankton assessed by the slopes of the regression lines relating carbon and nitrogen in particles has also been studied from the literature. {T}his {C}/{N} ratio ranges between 5 and 7.5 (at/at) in the ocean, whatever the region, the season, or the phytoplankton present, suggesting that in the field the phytoplankton constituent ratio is probably never very different from the mean ratio found in phytoplankton by {R}edfield. {D}ifferent possible sources of uncertainty are discussed to explain discrepancies between {C}/{N} uptake values and composition ratios. ({D}'apr{\`e}s r{\'e}sum{\'e} d'auteur)},
  keywords = {{PHYTOPLANCTON} ; {PRODUCTION} {PRIMAIRE} ; {MESURE} ; {METHODE} ; {C} 14 ; {TRACEUR} {RADIOACTIF} ; {C}/{N} ; {PACIFIQUE} {EQUATORIAL}},
  volume = {197},
  numero = {},
  pages = {121--131},
  booktitle = {{M}easurement of primary production from the molecular to the global scale : proceedings},
  year = {1993},
  URL = {https://www.documentation.ird.fr/hor/fdi:39883},
}