@article{PAR00009127,
  title = {{T}he composition and flux of particulate and dissolved carbohydrates from the {R}hone {R}iver into the {M}editerranean {S}ea},
  author = {{P}anagiotopoulos, {C}. and {S}emp{\'e}r{\'e}, {R}ichard and {P}ara, {J}. and {R}aimbault, {P}. and {R}abouille, {C}. and {C}harriere, {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}arbohydrates are important components of the carbon cycle and may be used as indicators of the origin and the diagenetic status of marine and terrestrial organic matter. {N}evertheless, comprehensive studies of both particulate ({PCHO}) and dissolved ({DCHO}) carbohydrates in rivers are scarce, and the seasonal and interannual variability of these compounds in relationship to the bulk particulate ({POM}) and dissolved organic matter ({DOM}) is largely unknown. {F}or the period 2007-2009, we sampled once per month {POM} and {DOM} and measured the total suspended matter ({TSM}), {POM}, {DOM}, {PCHO}, and {DCHO} for the {R}hoone {R}iver, which flows into the {M}editerranean {S}ea. {U}sing these measurements, we estimated for the above parameters annual fluxes for the period 2007-2009. {T}he estimated carbohydrate fluxes averaged 0.064 +/- 0.026 x 10(10) moles {C}yr(-1) for {PCHO} and 0.042 +/- 0.008 x 10(10) moles {C}yr-1 {DCHO}, representing 6% and 7% of the annual flux of {POC} and {DOC}, respectively. {D}uring flood and low-water periods, {POM} variations were reflected into the {PCHO} pool, whereas this was not observed for {DOC} and {DCHO}, indicating a decoupling between particulate and dissolved organic matter. {O}ur results also showed that flood and low-water periods may be differentiated using the ratios {PCHO}/{DCHO} and {POC}/{DOC}, which had a significant relationship. {B}ased on the carbohydrate abundances in both the {PCHO} and {DCHO} pools, we conclude that this material mainly derives from allochthonous sources (vascular plants, bacteria and soils). {M}oreover, during flood events, an enrichment in mannose in {POM} was observed, probably reflecting an angiosperm source (leaves or grasses). {B}y expanding our re-sults to the northwestern {M}editerranean {S}ea ({G}ulf of {L}ions), we found that the total organic carbon ({TOC}) fluxes of the {R}hone {R}iver accounted for similar to 1% of the standing stock of seawater {TOC}. {C}onsidering that glucose is the most abundant carbohydrate in both particulate and dissolved organic matter pools (similar to 33 %), its annual flux in the northwestern {M}editerranean {S}ea was estimated to 3.8 x 10(8) moles glucose.},
  keywords = {{FRANCE} ; {MEDITERRANEE} ; {RHONE} {ALPES}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {9},
  numero = {5},
  pages = {1827--1844},
  ISSN = {1726-4170},
  year = {2012},
  DOI = {10.5194/bg-9-1827-2012},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00009127},
}