@article{fdi:010065429,
  title = {{T}he hydrological and environmental evolution of shallow {L}ake {M}elincue, central {A}rgentinean {P}ampas, during the last millennium},
  author = {{G}uerra, {L}. and {P}iovano, {E}. {L}. and {C}ordoba, {F}. {E}. and {S}ylvestre, {F}lorence and {D}amatto, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{L}ake {M}elincue, located in the central {P}ampean {P}lains of {A}rgentina, is a shallow (similar to 4 m), subsaline lake ({TDS} >2000 ppm), highly sensitive to hydrological changes. {T}he modern shallow lake system is composed of: (a) a supralittoral area, which includes a narrow mudflat, a vegetated mudflat and wetlands subenvironments; and (b) the main water body, comprising lacustrine marginal and inner areas. {T}he development and extension of these subenvironments are strongly conditioned upon lake surface fluctuations. {P}ast environmental changes were reconstructed through sedimentological, physical and geochemical proxy analyses of two short sedimentary cores (similar to 127 cm). {W}ell-constrained {P}b-210 ages profiles were modeled and radiocarbon chronologies were determined, covering a period from similar to {AD} 800 to the present. {T}he analyzed sedimentary cores from {L}ake {M}elincue allowed for the reconstruction of past hydrological scenarios and associated environmental variability, ranging from extremely low lake levels during dry phases to pronounced highstands at wet periods. {T}he paleohydrological reconstruction revealed very shallow conditions in the period between {AD} 806 and {AD} 1880, which was registered by massive deposits with low organic matter. {R}elatively wetter phases disrupting this dry period were represented by organic matter increases. {A} major wet phase was registered by {AD} 1454, after the end of the {M}edieval {C}limate {A}nomaly. {A} subsequent abrupt shift from this wet phase to drier conditions could be matching the transition between the end of the {M}edieval {C}limatic {A}nomaly and the beginning of the {L}ittle {I}ce {A}ge. {T}he occurrence of sedimentary hiatuses between {AD} 1492 and {AD} 1880 in {M}elincue sequence could correspond to intensive droughts during the {L}ittle {I}ce {A}ge. {A}fter {AD} 1880, banded and laminated, autochthonous, organic matter-rich sediments registered an important lacustrine transgression and the onset of a permanent shallow lake, corresponding to the beginning of the current warm period. {T}he uppermost recent fine-grained, low salinity, organic sediments represent a lake transgression occurred in the 1970s, coeval with a general increase in precipitation across southeastern {S}outh {A}merica. {T}his transgression is registered regionally in other {P}ampean lakes and in the 20th century instrumental records of {L}ake {M}elincue. {T}his paleoenvironmental reconstruction provides a new high-resolution record that registers striking hydroclimatic changes occurred at a regional scale across the {P}ampean {P}lains during the last millennium and it contributes to understand the past climatic history in southeastern {S}outh {A}merica.},
  keywords = {{P}ampean {P}lains ; {H}ydroclimatic changes ; {P}aleoenvironmental reconstruction ; {C}losed basin ; {P}aleolimnological record ; {L}ast millennium ; {ARGENTINE} ; {MELINCUE} {LAC}},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {529},
  numero = {{SI}},
  pages = {570--583},
  ISSN = {0022-1694},
  year = {2015},
  DOI = {10.1016/j.jhydrol.2015.01.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065429},
}