@article{fdi:010079139,
  title = {{S}table carbon isotopes delta {C}-13 as a proxy for characterizing carbon sources and processes in a small tropical headwater catchment : {N}simi, {C}ameroon},
  author = {{N}dondo, {G}. {R}. {N}. and {P}robst, {J}. {L}. and {N}djama, {J}. and {N}goupayou, {J}. {R}. {N}. and {B}oeglin, {J}. {L}. and {T}akem, {G}. {E}. and {B}runet, {F}. and {M}ortatti, {J}. and {G}authier-{L}afaye, {F}. and {B}raun, {J}ean-{J}acques and {E}kodeck, {G}. {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}tream carbon fluxes are one of the major components in the global {C} cycle, yet the discrimination of the various sources of stream carbon remains to a large extent unclear and less is known about the biogeochemical transformations that accompany the transfer of {C} from soils to streams. {H}ere, we used patterns in stream water and groundwater delta {C}-13 values in a small forested tropical headwater catchment to investigate the source and contribution from the soil carbon pools to stream organic and inorganic carbon behavior over seasonal scales. {S}tream organic carbon ({DOC} and {POC}) comes mainly from the upper rich soil organic carbon horizons and derived from total organic carbon ({TOC}) of biogenic source. {T}he isotopic compositions delta {C}-13({TOC}), delta {C}-13({DOC}) and delta {C}-13({POC}) of these carbon species were very close (-30 parts per thousand to -26 parts per thousand) and typical of the forested {C}3 vegetation. {T}he relationship observed between {DOC} and log p{CO}(2) and delta {C}-13({DIC}) indicated that besides the considerable {CO}2 evasion that occurs as {DIC} is transported from soils to streams, there were also other processes affecting the stream {DIC} pool. {I}n-stream mineralization of {DOC} and mixing of atmospheric carbon had a significant influence on the delta {C}-13({DIC}) values. {T}hese processes which varied seasonally with hydrological changes represent the main control on {DOC} and {DIC} cycling in the wet tropical milieu. {T}he rapid turnover of carbon on hillside soils, the transformation of {TOC} to {DOC} in wetland soils and further mineralization of stream {DOC} to {DIC} favor the evasion of {C}, making the zone a source of carbon to the atmosphere.},
  keywords = {{D}issolved inorganic carbon ({DIC}) ; delta {C}-13 carbon isotope composition ; {D}issolved organic carbon ({DOC}) ; {S}oil organic carbon mineralization ; {P}artial pressure of {CO}2(p{CO}(2)) ; {C}arbon sources ; {CAMEROUN} ; {NSIMI}},
  booktitle = {},
  journal = {{A}quatic {G}eochemistry},
  volume = {27},
  numero = {1},
  pages = {1--30},
  ISSN = {1380-6165},
  year = {2021},
  DOI = {10.1007/s10498-020-09386-8},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079139},
}