@article{fdi:010081453,
  title = {{C}ontribution of meandering rivers to natural carbon fluxes : evidence from the {U}cayali {R}iver, {P}eruvian {A}mazonia},
  author = {{W}alcker, {R}. and {C}orenblit, {D}. and {J}ulien, {F}. and {M}artinez, {J}ean-{M}ichel and {S}teiger, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{B}etter understanding the fate of the atmospheric carbon ({C}) captured by plant photosynthesis is essential to improve natural {C} flux modelling. {S}oils are considered as the major terrestrial bioreactor and repository of plant {C}, whereas channel networks of floodplain rivers collect and transport, throughout the aquatic continuum, a significant part of plant primary production until its export through outgassing or sequestration in marine sediments. {H}ere, we show that river meandering in forested floodplains is a crucial and widely overlooked {E}arth surface process promoting {C} fluxes from the atmosphere to the aquatic continuum, via the floodplain vegetation. {O}ver a recent period of 35 years (1984-2019), we quantified those {C} fluxes in one of the most active meandering rivers on {E}arth, the {U}cayali {R}iver, {P}eru, {S}outh {A}merica. {W}e used map time series combined with above-ground forest {C} data to derive the amount of {C} that is annually captured by the growing floodplain vegetation within the active meander belt, as well as exported to the aquatic continuum by lateral channel erosion. {W}e found that the annual building and erosion of forested floodplain areas was nearly balanced over time with 19.0 +/- 7.7x10(3) ha(-1) yr(-1) and 19.8 +/- 6.7x10(3) ha(-1) yr(-1), respectively. {W}hile growing forests within the active meander belt annually captured 0.01 +/- 0.05x10(6) {M}g {C} yr(-1), lateral channel erosion provided the nearly 100-fold amount of {C} to the river channel and its stream flow, i.e. 0.9 +/- 0.4x10(6) {M}g {C} yr(-1). {O}ur findings revealed that the migration of the {U}cayali {R}iver channel provided nearly 10-times more lignified {C} per unit area to the aquatic continuum(44.7 +/- 21.4{M}g {C} ha(-1) yr(-1)) than non-meandering central {A}mazonian floodplains do. {T}ogether, these findings point to the importance of quantifying the overall contribution of meandering rivers to natural {C} fluxes worldwide.},
  keywords = {{A}mazon ; {C}arbon ; {F}loodplain ; {F}orest age ; {M}eandering river ; {R}emote sensing ; {PEROU} ; {AMAZONIE} ; {UCAYALI} {COURS} {D}'{EAU}},
  booktitle = {},
  journal = {{S}cience of the {T}otal {E}nvironment},
  volume = {776},
  numero = {},
  pages = {146056 [10 ]},
  ISSN = {0048-9697},
  year = {2021},
  DOI = {10.1016/j.scitotenv.2021.146056},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081453},
}