SciELO - Scientific Electronic Library Online

 
vol.32 número2Los bosques de la isla Robinson Crusoe, Chile: hotspot de endemismo en peligroDiagrama de manejo de densidad y su aplicación a raleo en bosques de segundo crecimiento de Drimys winteri en el sur de Chile índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google

Compartir


Bosque (Valdivia)

versión On-line ISSN 0717-9200

Resumen

MOYA, Jorge  y  LARA, Antonio. Tree rings Chronologies of queñoa (Polylepis tarapacana) for the last 500 years in the Altiplano of Arica and Parinacota Region, Chile. Bosque (Valdivia) [online]. 2011, vol.32, n.2, pp.165-173. ISSN 0717-9200.  http://dx.doi.org/10.4067/S0717-92002011000200007.

The need to cover the dendrochronological research gaps in the Sub Tropical regions of South America motivated the search for new geographical areas and new species to investigate climatic variability. Polylepis tarapacana grows above 4,200 m a.s.l. in South America (16º- 23º S), permitting the expansion of dendrochronological studies in subtropical areas. Samples from living and dead trees were collected in January 2003, near Nasahuento village (17º 32´S, 69º 35´ W) at 4,313 m a.s.l. and Guallatire volcano (18º 48´ S, 69º 08´ W) at 4,750 m a.s.l. These samples rendered the first two tree-ring chronologies of P. tarapacana in Chile. Nasahuento and Guallatire chronologies date back 242 and 536 years, respectively. Both were compared with instrumental records of precipitation and temperature. Statistics obtained from these analyses showed that both sites are adequate to be used for dendroclimatic purposes. Correlation functions showed that growth is mainly regulated by precipitation, correlating positively with the previous summer and negatively with the current one. January shows the most significant coefficients for both years. On the other hand, temperature is negatively correlated with the previous summer and positively correlated with the current season, evidencing a relationship between tree growth and water availability. Tree-ring chronologies developed in this study provide high-resolution climate sensitive records that are valuable for future climate reconstructions.

Palabras clave : Polylepis tarapacana; dendrochronology; climatic variability.

        · resumen en Español     · texto en Español     · Español ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons