CONICET | Buscador de Institutos y Recursos Humanos

We present data from (palaeo-)palynological/(palaeo-)ecological investigations in northwestern Argentina, resulting from various international researchprojects, which target at:1) The consolidation of modern pollen rain data for northwestern Argentina(Atlas PALNOA), including the documentation and detailed description of thepalynological and ecological characteristics of the predominant vegetationalzones.2) The development of a pollen-vegetation dispersion model which covers the principal phytogeographical provinces (High-Andean, Puna, Prepuna, Yungas,Chaco), basing on soil surface samples within latitudinal and altitudinal transects. The data permits the separation of representative regional, local and extralocal pollen spectra, featuring the interpretative value of ecological indicator species. The evidence of human impact is apparent in all samples, in correspondence with the extent of landscape denaturalization.3) Palaeoecological and archaeobotanical records derived from lake sedimentand peat-drillings and from archaeological investigations show repeated climate regime shifts throughout the Holocene. High-resolution information is especially available for the mid- and late-Holocene, giving evidence of the interaction of human colonisation strategies with climate variability. Recent research focuses on ecological and palaeoecological investigations of high-Andean cushion peatlands, which show astonishing accumulation rates and have the quality to be very sensitive towards environmental changes.Therefore, their peat layers offer a valuable climate archive. The investigations include pollen, plant macrofossil and diatom analyses, which are to further enrich the knowledge about Andean (palaeo-)ecosystems.

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