INGEOSUR   20376
INSTITUTO GEOLOGICO DEL SUR
Unidad Ejecutora - UE
artículos
Título:
Postglacial vegetation and climate changes inferred from a peat pollen record in the Río Pipo valley, southern Tierra del Fuego
Autor/es:
ANA MARÍA BORROMEI; FEDERICO PONCE; ANDREA CORONATO; MUSOTTO,LORENA LAURA; XABIER PONTEVEDRA-POMBAL
Revista:
APA Publicación Electrónica
Editorial:
Asociación Paleontológica Argentina
Referencias:
Lugar: Buenos Aires; Año: 2016 vol. 16 p. 168 - 183
Resumen:
The pollen analysis from Cañadón del Toro peat bog (54° 49? 36? S; 68° 27? 36? W), located in an interior valley of the FuegianAndes, provides information about vegetation and climate changes during the last 13,500 years. The results indicate the postglacial development of steppe-like vegetation under drier and colder conditions than today, followed by the expansion of Nothofagus into the valley after 10,350 cal. yr BP. At this time, the predominance of a forest-steppe ecotone suggests warm conditions and an increase in moisture availability. By about 6,700 cal. yr BP, the closed-canopy Nothofagus forest spread under cold and wet conditions. The mire environment also reflects the increasing trend of effective moisture changing from an initial minerotrophic Cyperaceae fen to an ombrotrophic Sphagnum bog development.