SciELO - Scientific Electronic Library Online

 
vol.37 número3Enfermedades bacterianas de eucaliptos: Estado actual del conocimientoAntecedentes históricos sobre el Complejo Forestal y Maderero Panguipulli, provincia de Valdivia, Centro-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

ROZAS, Vicente; LE QUESNE, Carlos  y  ROJAS-BADILLA, Moisés. Climatic factors controlling radial growth and formation of wood density fluctuations in Austrocedrus chilensis in Valdivia, Chile. Bosque (Valdivia) [online]. 2016, vol.37, n.3, pp.461-471. ISSN 0717-9200.  http://dx.doi.org/10.4067/S0717-92002016000300003.

Tree-ring widths and intrannual wood density fluctuations (IADFs) are sound proxies of the environmental factors that control the growth of forest tree species. In this work we evaluated the impact of climate on radial growth and IADFs formation in an Austrocedrus chilensis plantation in Valdivia, Chile. We calculated mean tree-ring chronology and the annual distribution of IADFs frequency from 20 trees, and we studied their relationships with local precipitation, temperature, and large-scale El Niño-Southern Oscillation (ENSO) and Antarctic Oscillation (AO) climatic teleconnections in the period 1975-2010. We used correlation and multiple linear regression analyses to assess the climate-growth relationships and t test for means comparison to check for differences between years with and without IADFs. We observed an inverse relationship of growth with previous summer precipitation and maximum temperature during the growing period, which suggests physiological stress for trees caused by water surplus and warm summer conditions. Years with maximum IADFs frequency were those coinciding with El Niño events, which caused dry and warm summer conditions in the study area, followed by rainy conditions in September. We did not find statistically significant relationships with AO. The interaction between local climatic conditions and ENSO variation controlled IADFs formation in the wood of A. chilensis in Valdivia.

Palabras clave : Valdivian climate; wood anatomy; dendrochronology; ENSO; rainfall.

        · 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