INVESTIGADORES
PUNTIERI javier Guido
artículos
Título:
Interannual variations in primary and secondary growth of Nothofagus pumilio and their relationships with climate
Autor/es:
MAGNIN, AMARU; PUNTIERI, JAVIER; RICARDO VILLALBA
Revista:
TREES-STRUCTURE AND FUNCTION
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014 vol. 28
ISSN:
0931-1890
Resumen:
The relationships between apical (or primary)
and radial (or secondary) growth, and climatic influences
on both types of growth, were evaluated for Nothofagus
pumilio (Nothofagaceae), the dominant subalpine tree in
Patagonia. We measured the spacing and number of nodes
of annual shoots developed in the period 2001?2010 in 40
N. pumilio trees growing near the upper treeline in the
northern Patagonian Andes (41S). Variations in ring width
at the base of each trunk were also recorded. Interannual
variations in primary and secondary growth were significantly
related to each other, and to several climate variables.
Mean temperatures in winter and early spring (June?
October) prior to the period of shoot extension were positively
associated with both primary and secondary growth.
In addition, total summer precipitation (December?March)
was positively related to shoot extension, whereas mean
summer temperature during the previous growth season (January?March) was directly related to radial growth.
These climatic influences on N. pumilio growth may play a
major role in regulating the expressions of preformation
and neoformation.