Palynology of cushion bogs of the Cordillera Pelada, Province of Valdivia, Chile

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Description :
Available evidence indicates that plants survived the last glaciation north of the glacial border with the course of postglacial migration southward following the wastage of the glacier complex. Holocene climatic and vegetational changes in the Cordillera Pelada are interpreted in the context of regional reconstructions which show maximum warmth about 9 000 yr ago with a pronounced dry period lasting from 9 000 to 6 500 yr B.P. Maximum precipitation was later reached around 4 000 yr ago but has decreased overall since then. The regional decline of the endemic gymnosperm Fitzroya cupressoides, which today is extensively destroyed in the Cordillera Pelada, follows this decrease in precipitation. These climatic data suggest a net southward shift in the zone of westerly winds that bring rainfall to the region over the past 4 000 yr.

Type de document :
Article de périodique

Source :
Quaternary research New York, 1982, vol. 17, n°. 1, p. 71-92, Références bibliographiques : 41 réf.

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