@article{fdi:010072466,
  title = {{D}ynamics of floodplain lakes in the {U}pper {A}mazon {B}asin during the late {H}olocene},
  author = {{Q}uintana-{C}obo, {I}. and {M}oreira {T}urcq, {P}atricia and {C}ordeiro, {R}. {C}. and {A}niceto, {K}. and {C}rave, {A}. and {F}raizy, {P}ascal and {M}oreira, {L}. {S}. and {C}ontrera, {J}mdd and {T}urcq, {B}runo},
  editor = {},
  language = {{ENG}},
  abstract = {{T}o better understand the impact of channel migration processes and climate change on the depositional dynamics of floodplain lakes of the upper {A}mazon {B}asin during the late {H}olocene, we collected three sediment cores from floodplain lakes of the {U}cayali {R}iver and one from the {M}aranon {R}iver. {T}he cores were dated with {C}-14, radiographed and described. {B}ulk density, grain size analysis and total organic carbon ({TOC}) were determined. {T}he results show that sedimentation in {U}cayali floodplain lakes was marked by variations during the late {H}olocene, with periods of intense hydrodynamic energy and abrupt accumulations, a gap in the record between about 2870 and 690 cal yr {BP}, and periods of more lacustrine conditions. {T}hese changes in sedimentation were associated with variations in the river's influence related to changes in its meandering course (2870 cal yr {BP}) and a period of severe flooding between 3550 and 3000 cal yr {BP}. {L}ake {L}agarto on the {M}aranon {R}iver floodplain exhibits a different sedimentary environment of low hydrodynamics with palm trees and macrophytes. {A}pparently, the lake has not experienced intense migration processes during the last 600 cal yr {BP} (base of the core). {N}evertheless, the river sediment flux to the lake was important from 600 to 500 cal yr {BP}, although it decreased thereafter until the present. {T}his decrease in the mineral accumulation rate indicates a decrease in river discharge since 500 cal yr {BP}, which coincides with precipitation records from the central {A}ndes. {I}n the upper part of the three {U}cayali floodplain cores, a 30- to 250-cm-thick layer of reworked sediments has been deposited since 1950 {AD} (post-bomb). {I}n {L}ake {C}armen, this layer is associated with invasion of the lake by the levee of a migrating meander of the {U}cayali. {I}n {L}akes {H}ubos and {L}a {M}oringa, however, the river is still far away and the deposition must be interpreted as the result of extreme flooding. {T}he beginning of the {U}cayali meander migration is dated back to 2000 {AD}, suggesting that these extreme floods could be very recent and linked to hydrologic extremes registered instrumentally in the {A}mazon {B}asin.},
  keywords = {{U}pper {A}mazon {B}asin ; {L}ate {H}olocene ; {A}brupt accumulation events ; {L}ake sedimentation ; {PEROU} ; {ANDES} ; {AMAZONE} {BASSIN}},
  booktitle = {},
  journal = {{C}omptes {R}endus {G}eoscience},
  volume = {350},
  numero = {1-2},
  pages = {55--64},
  ISSN = {1631-0713},
  year = {2018},
  DOI = {10.1016/j.crte.2017.10.004},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072466},
}