Diameter growth: Can live trees decrease?

Growth refers to an increase in dimensions with time and is implicit in the expected continual increase in tree dimensions. Tree diameters, however, could decrease during the growing season due to water depletion. Annual negative growth measurements are usually attributed to human error and not to o...

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Autores principales: Martínez Pastur, Guillermo, Lencinas, María Vanessa, Cellini, Juan Manuel, Mundo, Ignacio Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Ciencias Agrarias
Trees
Diameter
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82982
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82982
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Trees
Diameter
spellingShingle Ciencias Agrarias
Trees
Diameter
Martínez Pastur, Guillermo
Lencinas, María Vanessa
Cellini, Juan Manuel
Mundo, Ignacio Alberto
Diameter growth: Can live trees decrease?
topic_facet Ciencias Agrarias
Trees
Diameter
description Growth refers to an increase in dimensions with time and is implicit in the expected continual increase in tree dimensions. Tree diameters, however, could decrease during the growing season due to water depletion. Annual negative growth measurements are usually attributed to human error and not to other physiological or physical processes. Although seasonal and diurnal fluctuations of diameter have been well documented, perennial decrement of diameter has not been the focus of physiological research. The aim of this work was to analyse the potential causes of decrease in annual diameter growth related to tree mortality due to self-thinning in Nothofagus pumilio forests and to quantify the variations in water depletion of the tree trunks. Some trees did present negative annual diameter increments associated with a water content decrease in the trunks (77 per cent in live trees compared with 56 per cent in recently dead individuals), which produced a contraction (more than 8 per cent of the initial diameter) in the wood and the bark. Trees could survive during 2-5 growth seasons with continual decreases in their diameters (14 per cent, standard error 5 per cent of the trees in the studied stand) until the water content reached a limit where mortality resulted. Therefore, the occurrence of data showing a diameter decrease in successive forest inventories may be due to physiological and physical processes in the natural dynamics of the stand, and not exclusively be explained away as the results of human measurement errors.
format Articulo
Articulo
author Martínez Pastur, Guillermo
Lencinas, María Vanessa
Cellini, Juan Manuel
Mundo, Ignacio Alberto
author_facet Martínez Pastur, Guillermo
Lencinas, María Vanessa
Cellini, Juan Manuel
Mundo, Ignacio Alberto
author_sort Martínez Pastur, Guillermo
title Diameter growth: Can live trees decrease?
title_short Diameter growth: Can live trees decrease?
title_full Diameter growth: Can live trees decrease?
title_fullStr Diameter growth: Can live trees decrease?
title_full_unstemmed Diameter growth: Can live trees decrease?
title_sort diameter growth: can live trees decrease?
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/82982
work_keys_str_mv AT martinezpasturguillermo diametergrowthcanlivetreesdecrease
AT lencinasmariavanessa diametergrowthcanlivetreesdecrease
AT cellinijuanmanuel diametergrowthcanlivetreesdecrease
AT mundoignacioalberto diametergrowthcanlivetreesdecrease
bdutipo_str Repositorios
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