Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/9877
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Within-individual variation of trunk and branch xylem density in tropical trees
Authors: Sarmiento, Carolina
Patino, Sandra
Paine, C E Timothy
Beauchene, Jacques
Thibaut, Anne
Baraloto, Christopher
Contact Email: c.e.t.paine@stir.ac.uk
Keywords: branch xylem density
French Guiana
functional trait
tropical trees
trunk xylem density
wood economics
Issue Date: Jan-2011
Publisher: Botanical Society of America
Citation: Sarmiento C, Patino S, Paine CET, Beauchene J, Thibaut A & Baraloto C (2011) Within-individual variation of trunk and branch xylem density in tropical trees, American Journal of Botany, 98 (1), pp. 140-149.
Abstract: Premise of the study: Wood density correlates with mechanical and physiological strategies of trees and is important for estimating global carbon stocks. Nonetheless, the relationship between branch and trunk xylem density has been poorly explored in neotropical trees. Here, we examine this relationship in trees from French Guiana and its variation among different families and sites, to improve the understanding of wood density in neotropical forests. Methods: Trunk and branch xylem densities were measured for 1909 trees in seven sites across French Guiana. A major-axis fit was performed to explore their general allometric relationship and its variation among different families and sites. Key results: Trunk xylem and branch xylem densities were significantly positively correlated, and their relationship explained 47% of the total variance. Trunk xylem was on average 9% denser than branch xylem. Family-level differences and interactions between family and site accounted for more than 40% of the total variance, whereas differences among sites explained little variation. Conclusions: Variation in xylem density within individual trees can be substantial, and the relationship between branch xylem and trunk xylem densities varies considerably among families and sites. As such, whole-tree biomass estimates based on non- destructive branch sampling should correct for both taxonomic and environmental factors. Furthermore, detailed estimates of the vertical distribution of wood density within individual trees are needed to determine the extent to which relying solely upon measures of trunk wood density may cause carbon stocks in tropical forests to be overestimated.
Type: Journal Article
URI: http://hdl.handle.net/1893/9877
DOI Link: http://dx.doi.org/10.3732/ajb.1000034
Rights: Publisher policy allows this work to be made available in this repository. Published in American Journal of Botany, January 2011 vol. 98 no. 1, pp.140-149 by Botanical Society of America, Inc. The original publication is available at http://www.amjbot.org/content/98/1/140
Affiliation: UMR "Ecologie des Forêts de Guyane", French Guiana
UMR "Ecologie des Forêts de Guyane", French Guiana
Biological and Environmental Sciences
UMR "Ecologie des Forêts de Guyane", French Guiana
UMR "Ecologie des Forêts de Guyane", French Guiana
UMR "Ecologie des Forêts de Guyane", French Guiana



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