@article{fdi:010057015,
  title = {{P}aleohydrological changes in an {A}mazonian floodplain lake : {S}anta {N}inha {L}ake},
  author = {{M}oreira, {L}. {S}. and {M}oreira {T}urcq, {P}atricia and {T}urcq, {B}runo and {C}aquineau, {S}andrine and {C}ordeiro, {R}. {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{H}olocene environments have been reconstructed by sedimentological, mineralogical and organic geochemical analysis of a 270-cm core from {S}anta {N}inha {L}ake, a floodplain lake in lower {A}mazonia. {D}ated by fourteen {AMS}-radiocarbon dates, the sediment core has a basal age of 5,600 cal years {BP} and different sedimentary units were identified. {T}hese units document various hydrologic phases in the evolution of this lake. {R}educed {A}mazon {R}iver influence, with reduced high-water levels of the river, characterized the period between 5,600 and 5,100 cal years {BP}. {C}omparison with other {A}mazonian and {A}ndean paleoclimate studies point to a dryer climate during this phase. {A}fter 5,100 cal years {BP} coarse sediments and quartz increase which suggest a higher inflow of the {A}mazon {R}iver. {B}etween 5,000 and 2,300 cal years {BP} the coarse sediments and quartz remain high but the organic carbon showed the lowest values. {T}he riverine inflow caused dilution of the organic material produced in the lake and consequently low rates of carbon flux in these phases were recorded. {T}hese results show that the hydrodynamics of the {A}mazon {R}iver strongly influence the behavior, productivity and consequently the sedimentation process in the floodplain lakes.},
  keywords = {{P}aleohydrology ; {O}rganic matter ; {P}aleoenvironment ; {A}mazon {B}asin ; {F}loodplain lakes},
  booktitle = {},
  journal = {{J}ournal of {P}aleolimnology},
  volume = {48},
  numero = {2},
  pages = {339--350},
  ISSN = {0921-2728},
  year = {2012},
  DOI = {10.1007/s10933-012-9601-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057015},
}