@article{PAR00012459,
  title = {{C}omposition and distribution of dissolved carbohydrates in the {B}eaufort {S}ea {M}ackenzie margin ({A}rctic {O}cean)},
  author = {{P}anagiotopoulos, {C}. and {S}emp{\'e}r{\'e}, {R}ichard and {J}acq, {V}. and {C}harri{\`e}re, {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he carbohydrate composition ({TDCHO}) of dissolved organic matter ({DOM}) was studied in the {M}ackenzie margin (southeast {B}eaufort {S}ea) in summer 2009 as a part of the {MALINA} project. {S}ampling was performed in the shelf (bottom depth <= 100 m), slope (100 m < bottom depth <= 1000 m), and basin (bottom depth > 1000 m) areas of the {M}ackenzie margin. {O}ur results showed that sugar concentrations did not follow dissolved organic carbon ({DOC}) patterns, which decreased from shelf to basin stations (from 115 to 65 mu {M}), but instead remained rather constant (965-900 n{M}), indicating an accumulation of carbohydrates in surface waters (0-80 m). {TDCHO} concentrations exhibited their highest values (>1000 n{M}) and higher relative abundance to {DOC} in the central sector of the studied area, especially in the zone between 130 and 135 degrees {W} indicating differences in their distribution in the broader area and possible various sources. {TDCHO} represented 6 +/- 2% and 8 +/- 3% of {DOC} ({TDCHO}-{C}/{DOC}) for the shelf and basin stations, respectively. {S}emi-labile {DOC} estimated values accounted for 10-40% and 20-50% of {DOC} in the slope and basin areas and agreed well with the above {TDCHO}/{DOC} values suggesting a gradient of carbohydrate freshness from inshore to offshore stations. {T}he high fucose + rhamnose relative abundances ({F}uc. + {R}ha. 15-18%) and high {C}/{N} ratios (19-13) recorded in the surface waters of the shelf area are indicative of soil-derived matter delivered by the {M}ackenzie {R}iver, possibly with contributions from mainly gymnosperm terrestrial plants. {T}he high abundance of glucose (up to 50%) suggests that the carbohydrate component of the {DOM} in the {M}ackenzie margin appears to have a more pronounced marine autochthonous origin with an important contribution of terrestrial sources, especially for the shelf stations. {O}verall, these results suggest a largely uniform distribution of {TDCHO} carbohydrates within the area with occasional patches of lower concentrations.},
  keywords = {{D}issolved organic carbon ({DOC}) ; {D}issolved carbohydrates ({TDCHO}) ; {M}ackenzie {R}iver margin ; {D}istribution and origins of carbohydrates ; {B}eaufort {S}ea ; {ARCTIQUE} ; {BEAUFORT} {MER}},
  booktitle = {},
  journal = {{M}arine {C}hemistry},
  volume = {166},
  numero = {},
  pages = {92--102},
  ISSN = {0304-4203},
  year = {2014},
  DOI = {10.1016/j.marchem.2014.09.004},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00012459},
}