Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/47186
Title: Differential growth responses to water balance of coexisting deciduous tree species are linked to wood density in a Bolivian tropical dry forest
Author: Mendivelso, H.A.
Camarero Martínez, Jesús Julio
Royo-Obregón, O.
Gutiérrez Merino, Emilia
Toledo, M.
Keywords: Dendrocronologia
Fenologia
Boscos
Bolívia
Climatologia
Dendrochronology
Phenology
Forests
Bolivia
Climatology
Issue Date: 7-Oct-2013
Publisher: Public Library of Science (PLoS)
Abstract: A seasonal period of water deficit characterizes tropical dry forests (TDFs). There, sympatric tree species exhibit a diversity of growth rates, functional traits, and responses to drought, suggesting that each species may possess different strategies to grow under different conditions of water availability. The evaluation of the long-term growth responses to changes in the soil water balance should provide an understanding of how and when coexisting tree species respond to water deficit in TDFs. Furthermore, such differential growth responses may be linked to functional traits related to water storage and conductance. We used dendrochronology and climate data to retrospectively assess how the radial growth of seven coexisting deciduous tree species responded to the seasonal soil water balance in a Bolivian TDF. Linear mixed-effects models were used to quantify the relationships between basal area increment and seasonal water balance. We related these relationships with wood density and sapwood production to assess if they affect the growth responses to climate. The growth of all species responded positively to water balance during the wet season, but such responses differed among species as a function of their wood density. For instance, species with a strong growth response to water availability averaged a low wood density which may facilitate the storage of water in the stem. By contrast, species with very dense wood were those whose growth was less sensitive to water availability. Coexisting tree species thus show differential growth responses to changes in soil water balance during the wet season. Our findings also provide a link between wood density, a trait related to the ability of trees to store water in the stem, and wood formation in response to water availability.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1371/journal.pone.0073855
It is part of: PLoS One, 2013, vol. 8, num. 10, p. e73855
Related resource: http://dx.doi.org/10.1371/journal.pone.0073855
URI: http://hdl.handle.net/2445/47186
ISSN: 1932-6203
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

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