@article{fdi:010063597,
  title = {{H}olocene paleolimnological reconstruction of a high altitude {C}olombian tropical lake},
  author = {{C}ardozo, {A}. {Y}. {V}. and {G}omes, {D}. {F}. and da {S}ilva, {E}. {M}. and {D}uque, {S}. {R}. {E}. and {R}angel, {J}. {O}. {C}. and {S}ifeddine, {A}bdelfettah and {T}urcq, {B}runo and {A}lbuquerque, {A}. {L}. {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}quatic environments in the high-{A}ndean may be quite vulnerable to climatic conditions and hydrological processes (precipitation/evaporation) that have the potential to alter water levels and chemistry. {T}his study reconstructs the paleohydrological history of {L}ake {T}ota, {C}olombia, to provide a record of environmental changes in the eastern flank of the {C}olombian {A}ndes during the late {H}olocene. {A} 54 cm core was collected at the margin of the lake at a depth of 1.5 m, and the paleohydrological reconstructions were based on changes in diatom assemblages, granulometry, and bulk organic geochemical parameters. {T}he core was subdivided into 5 biozones by assessing the significance of the variance among the {CONISS} clusters. {B}iozone {T}5 (base, 4000 calibrated years {BP}) was dominated by the planktonic diatom {D}iscostella stelligera and was deposited in a period of high-water level. {S}edimentation during this period was rich in carbon due to phytoplanktonic production; the granulometry data suggests that the lake was under high to moderate hydrological dynamic conditions, indicating active deposition at the river delta front. {B}iozone {T}4, beginning at 3600 cal. yrs {BP}, was dominated by three species {D}. stelligera, {C}occoneis placentula var. lineata and {F}ragilaria sensu lato, and this association could indicate that the lake was under the influence of large fluctuations in water level. {T}his interpretation is supported by granulometry and geochemical data, particularly by the low levels of total organic carbon ({TOC}). {I}n biozone {T}3, corresponding to 3000 cal. yrs {BP}, we found a lowering of the water level, suggested by low levels of {TOC}. {P}oor granulometric sorting and higher carbon/nitrogen ({C}/{N}) ratios suggest a macrophyte influence on the sedimentation, avoiding direct deltaic influence. {I}n this biozone the benthic diatom {F}. sensu lato group was dominant. {I}n biozone 12, starting 2400 cal. yrs {BP}, the proxies indicate that the lake experienced increasing water levels and that stronger circulation patterns occurred in the water column than in the preceding periods, as inferred by the presence of {A}ulacoseira granulata a ticoplanktonic species. {T}he sediment in this biozone is well sorted and finer, indicating a greater depth. {B}iozone {T}1 at the top of the core and since 2000 cal. yrs {BP} to the present, evidence for a recent reduction in water level of {L}ake {T}ota can be deduced by the presence of {A}chnanthidium minutissimum var. minutissimum.},
  keywords = {{P}aleohydrology ; {L}ate {H}olocene ; {D}iatoms ; {S}edimentary ; {O}rganic ; geochemistry ; {L}ake {T}ota ; {COLOMBIE} ; {ANDES} ; {ZONE} {TROPICALE}},
  booktitle = {{C}ontinental and coastal marine records of centennial to millennial changes in {S}outh {A}merican climate since the last glacial maximum},
  journal = {{P}alaeogeography {P}alaeoclimatology {P}alaeoecology},
  volume = {415},
  numero = {no sp{\'e}cial},
  pages = {127--136},
  ISSN = {0031-0182},
  year = {2014},
  DOI = {10.1016/j.palaeo.2014.03.013},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063597},
}