Diatom-based ionic concentration and salinity models from the south Bolivian Altiplano (15-23 degrees S)

The relationship between surface sediment diatom assemblages and measured limnological variables in fifty eight lake samples from the south Bolivian Altiplano was examined by constructing a diatom-water chemistry dataset. Analysis of this dataset by canonical correspondence analysis revealed that sa...

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Veröffentlicht in:Journal of paleolimnology 2001, Vol.25 (3), p.279-295
Hauptverfasser: Sylvestre, F., Servant-Vildary, S, Roux, M
Format: Artikel
Sprache:eng
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Zusammenfassung:The relationship between surface sediment diatom assemblages and measured limnological variables in fifty eight lake samples from the south Bolivian Altiplano was examined by constructing a diatom-water chemistry dataset. Analysis of this dataset by canonical correspondence analysis revealed that salinity and ionic concentration accounted for a significant amount of the variation in the distribution of the diatom assemblages. Two methods `weighted-averaging regression and calibration', and `by-class mean percentage table' were used to established a transfer function for future reconstruction of past lake water salinity and ionic concentration in the southern Bolivian Altiplano. Weighted-averaging regression and calibration with inverse deshrinking provided a better model for the water chemistry reconstructions in this region.
ISSN:0921-2728
1573-0417
DOI:10.1023/A:1011157611619