INVESTIGADORES
LUPO Liliana Concepcion
congresos y reuniones científicas
Título:
Holocene vegetational and climatic history inferred from palaeopalynological-palaeoecological studies in northwestern Argentina
Autor/es:
SCHITTEK, K., FLORES, F.F., MORALES, M.R., OXMAN, B., RUTHSATZ, B., SÁNCHEZ, A.C., SPERANZA, F., TORRES, G.R. Y LUPO, L.C.
Lugar:
Bonn, Alemania
Reunión:
Congreso; 12th International Palynological Congress IPC-XII 2008th International Organisation of Palaeobotany Conference IOPC-VIII; 2008
Institución organizadora:
International Organisation of Palaeobotany
Resumen:
We present data from (palaeo-)palynological/(palaeo-)ecological investigations
in northwestern Argentina, resulting from various international research
projects, which target at:
1) The consolidation of modern pollen rain data for northwestern Argentina
(Atlas PALNOA), including the documentation and detailed description of the
palynological and ecological characteristics of the predominant vegetational
zones.
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.