INVESTIGADORES
PONCE juan federico
artículos
Título:
POSTGLACIAL VEGETATION AND CLIMATE CHANGES INFERRED 2 FROM A PEAT POLLEN RECORD IN THE RÍO PIPO VALLEY, SOUTHERN 3 TIERRA DEL FUEGO
Autor/es:
BORROMEI, A. M.; MUSOTTO, L.; CORONATO, A.; PONCE, J.F.; PONTEVEDRA POMBAL, X.
Revista:
PUBLICACION ESPECIAL - ASOCIACION PALEONTOLOGICA ARGENTINA
Editorial:
ASOCIACIÓN PALEONTOLÓGICA ARGENTINA
Referencias:
Año: 2016
ISSN:
0328-347X
Resumen:
The pollen analysis from Cañadón del Toro peat bog (54° 49´ 36´´S; 68° 27´25 36´´W), located in an interior valley of Fuegian Andes, 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 6700 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.
