@article{fdi:010066041,
  title = {{I}-n-{A}tei palaeolake documents past environmental changes in central {S}ahara at the time of the "{G}reen {S}ahara" : charcoal, carbon isotope and diatom records},
  author = {{L}ecuyer, {C}. and {L}ezine, {A}nne-{M}arie and {F}ourel, {F}. and {G}asse, {F}. and {S}ylvestre, {F}lorence and {P}ailles, {C}. and {G}renier, {C}. and {T}ravi, {Y}. and {B}arral, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{D}uring the '{G}reen {S}ahara event', water bodies developed throughout the {S}ahara and {S}ahel, reflecting the enhanced influence of the {A}tlantic monsoon rainfall. {M}ajor lakes then dried out between 6.5 and 3.5 ka. {T}his study investigates land cover change and lacustrine environment during the {H}olocene at {I}-n-{A}tei, {S}outhern {A}lgeria, a desert region lying in the hyperarid core of the {S}ahara. {T}his site is remarkable by its extent (up to 80 km(2)) and by the exceptional preservation and thickness of the lacustrine deposits (7.2 m). {I}-n-{A}tei was a lake from 11 to 7.4 ka, then it dried out and left place to a swampy environment. {C}harcoal concentrations show that the surroundings of the lake were vegetated throughout the wet period with two short phases of possible vegetation deterioration associated with a lowering of the lake level at 93 and 82 ka, coeval with well-known dry events in the tropics. {T}he stable carbon isotope record reflects the penetration of {C}4 herbaceous populations in replacement of the original 0, typical of the regional vegetation at the time of the maximum lake expansion. {T}he delta {C}-13 of charcoals increase non-linearly with the {C}-14-based ages from -24.5 parts per thousand to -13.0 parts per thousand. ({V}-{PDB}). {A}ssuming that these extreme values sample both {C}3 and {C}4 plant end-members, mass balance calculations suggest that {C}3 were replaced by {C}4 plants according to an exponential decay law with a half-life (t(1/2)) of 850 +/- 110 years. {T}he replacement of {C}3 by {C}4 plants occurred in two main steps: a mixed {C}3-{C}4 vegetation of "wooded grassland" type was present from 10 ka to 8.4 ka while a {C}4 exclusive vegetation developed after 8.4 ka. {A}fter the end of the lacustrine phase a catastrophic event (flooding?) provoked the lifting of most of the lacustrine deposits and their re-deposition above the lacustrine sequence.},
  keywords = {{S}ahara ; {H}olocene ; {C}limate ; {L}ake ; {C}harcoal ; {C}arbon isotope ; {ALGERIE} ; {SAHARA} ; {HOGGAR}},
  booktitle = {},
  journal = {{P}alaeogeography {P}alaeoclimatology {P}alaeoecology},
  volume = {441},
  numero = {4},
  pages = {834--844},
  ISSN = {0031-0182},
  year = {2016},
  DOI = {10.1016/j.palaeo.2015.10.032},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066041},
}