Bosque (Valdivia)  vol.33 no.3; Resumen: S0717-92002012000300006
Revistas Electrónicas UACh
Web Sistema de Bibliotecas UACh
Formulario de Contacto Revistas Electrónicas UACh (OFF)
Revistas Electrónicas UACh - Bosque (Valdivia)
 
vol.33 no.3Recuperación del balance de carbono y el rol de los residuos leñosos de gran tamaño en ecosistemas forestales post-cosecha del sur de Siberia¿Los castores mejoran la calidad del hábitat para el pájaro carpintero magallánico?  Indice de autoresIndice de materiabúsqueda de artículos
Inicio revistalista alfabética de revistas  
-

Bosque (Valdivia)
ISSN 0717-9200 versión on-line

 
  Como citar este artículo
  Agregar a favoritos
  Enviar a e-mail


Resumen

IVANCICH, Horacio S, MARTINEZ PASTUR, Guillermo J, ROIG, Fidel A et al. Cambios en los patrones de crecimiento de los bosques del límite superior altitudinal de Tierra del Fuego en relación al cambio climático. Bosque (Valdivia), 2012, vol.33, no.3, p.267-270. ISSN 0717-9200.

Nothofagus pumilio occupy the mountain slopes reaching to the upper altitudinal limit of the forests. This extremely stressful environment represents the optimum conditions to study changes in growth patterns due to climate variations. Our goal was to analyze recent changes in stem height growth in forests located in the upper altitudinal tree-line along Tierra del Fuego (Argentina), and establish possible linkages to changes observed in surface temperature during the last decades. Nine locations were sampled, and four plots were measured in each location. Forest structure was characterized, and stem analyses were performed to assess height growth patterns. ANOVAs and classification analyses were conducted using location and time as main variables. Tree-growth height increased with time, e.g. 1.0 cm.year-1 during 1870-1959, 2.7 cm year-1 during 1960-1979, and 5.0 cm year-1 during 1980-2010. These differences were significant between periods and locations, and can be related to its geographical situation. Increment in stem height growth seems to be related with the worldwide surface air temperature. A decline in stem height growth registered during the last two decades can also be related with the regional decrease in the mean air temperature. The analysis of stem height growth is a useful tool to evaluate the incidence of climate change over trees growing under extreme environmental conditions.

Palabras Clave: tree-line; Nothofagus; height growth; climate change; forest structure.

        · resumen en español     · texto en inglés     · pdf en inglés


© 2019 • Facultad de Ciencias Forestales, Universidad Austral de Chile
Teléfono/Fax: 56 63 221998 • Casilla 567 • Campus Isla Teja S/N • Valdivia • Chile
E-mail: