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High-resolution proxies for wood density variations in Terminalia superba

Maaike De Ridder UGent, Jan Van den Bulcke UGent, Dries Vansteenkiste UGent, Denis Van Loo UGent, Manuel Dierick UGent, Bert Masschaele UGent, Yoni De Witte UGent, David Mannes, Eberhard Lehmann and Hans Beeckman, et al. (2011) ANNALS OF BOTANY. 107(2). p.293-302
abstract
Background and Aims Density is a crucial variable in forest and wood science and is evaluated by a multitude of methods. Direct gravimetric methods are mostly destructive and time-consuming. Therefore, faster and semi- to non-destructive indirect methods have been developed. Methods Profiles of wood density variations with a resolution of approx. 50 mu m were derived from one-dimensional resistance drillings, two-dimensional neutron scans, and three-dimensional neutron and X-ray scans. All methods were applied on Terminalia superba Engl. & Diels, an African pioneer species which sometimes exhibits a brown heart (limba noir). Key Results The use of X-ray tomography combined with a reference material permitted direct estimates of wood density. These X-ray-derived densities overestimated gravimetrically determined densities non-significantly and showed high correlation (linear regression, R-2 = 0.995). When comparing X-ray densities with the attenuation coefficients of neutron scans and the amplitude of drilling resistance, a significant linear relation was found with the neutron attenuation coefficient (R-2 = 0.986) yet a weak relation with drilling resistance (R-2 = 0.243). When density patterns are compared, all three methods are capable of revealing the same trends. Differences are mainly due to the orientation of tree rings and the different characteristics of the indirect methods. Conclusions High-resolution X-ray computed tomography is a promising technique for research on wood cores and will be explored further on other temperate and tropical species. Further study on limba noir is necessary to reveal the causes of density variations and to determine how resistance drillings can be further refined.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
RING WIDTH, QUANTIFICATION, TOMOGRAPHY, STANDING TREES, NEUTRON RADIOGRAPHY, X-RAY DENSITOMETRY, COEFFICIENTS, PROFILES, High-resolution X-ray tomography, neutron imaging, drilling resistance, Terminalia superba, wood density
journal title
ANNALS OF BOTANY
Ann. Bot.
volume
107
issue
2
pages
293 - 302
Web of Science type
Article
Web of Science id
000286672500010
JCR category
PLANT SCIENCES
JCR impact factor
4.03 (2011)
JCR rank
19/189 (2011)
JCR quartile
1 (2011)
ISSN
0305-7364
DOI
10.1093/aob/mcq224
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1073823
handle
http://hdl.handle.net/1854/LU-1073823
date created
2010-11-16 11:50:27
date last changed
2011-06-17 11:22:34
@article{1073823,
  abstract     = {Background and Aims Density is a crucial variable in forest and wood science and is evaluated by a multitude of methods. Direct gravimetric methods are mostly destructive and time-consuming. Therefore, faster and semi- to non-destructive indirect methods have been developed. Methods Profiles of wood density variations with a resolution of approx. 50 mu m were derived from one-dimensional resistance drillings, two-dimensional neutron scans, and three-dimensional neutron and X-ray scans. All methods were applied on Terminalia superba Engl. \& Diels, an African pioneer species which sometimes exhibits a brown heart (limba noir). Key Results The use of X-ray tomography combined with a reference material permitted direct estimates of wood density. These X-ray-derived densities overestimated gravimetrically determined densities non-significantly and showed high correlation (linear regression, R-2 = 0.995). When comparing X-ray densities with the attenuation coefficients of neutron scans and the amplitude of drilling resistance, a significant linear relation was found with the neutron attenuation coefficient (R-2 = 0.986) yet a weak relation with drilling resistance (R-2 = 0.243). When density patterns are compared, all three methods are capable of revealing the same trends. Differences are mainly due to the orientation of tree rings and the different characteristics of the indirect methods. Conclusions High-resolution X-ray computed tomography is a promising technique for research on wood cores and will be explored further on other temperate and tropical species. Further study on limba noir is necessary to reveal the causes of density variations and to determine how resistance drillings can be further refined.},
  author       = {De Ridder, Maaike and Van den Bulcke, Jan and Vansteenkiste, Dries and Van Loo, Denis and Dierick, Manuel and Masschaele, Bert and De Witte, Yoni and Mannes, David and Lehmann, Eberhard and Beeckman, Hans and Van Hoorebeke, Luc and Van Acker, Joris},
  issn         = {0305-7364},
  journal      = {ANNALS OF BOTANY},
  keyword      = {RING WIDTH,QUANTIFICATION,TOMOGRAPHY,STANDING TREES,NEUTRON RADIOGRAPHY,X-RAY DENSITOMETRY,COEFFICIENTS,PROFILES,High-resolution X-ray tomography,neutron imaging,drilling resistance,Terminalia superba,wood density},
  language     = {eng},
  number       = {2},
  pages        = {293--302},
  title        = {High-resolution proxies for wood density variations in Terminalia superba},
  url          = {http://dx.doi.org/10.1093/aob/mcq224},
  volume       = {107},
  year         = {2011},
}

Chicago
De Ridder, Maaike, Jan Van den Bulcke, Dries Vansteenkiste, Denis Van Loo, Manuel Dierick, Bert Masschaele, Yoni De Witte, et al. 2011. “High-resolution Proxies for Wood Density Variations in Terminalia Superba.” Annals of Botany 107 (2): 293–302.
APA
De Ridder, Maaike, Van den Bulcke, J., Vansteenkiste, D., Van Loo, D., Dierick, M., Masschaele, B., De Witte, Y., et al. (2011). High-resolution proxies for wood density variations in Terminalia superba. ANNALS OF BOTANY, 107(2), 293–302.
Vancouver
1.
De Ridder M, Van den Bulcke J, Vansteenkiste D, Van Loo D, Dierick M, Masschaele B, et al. High-resolution proxies for wood density variations in Terminalia superba. ANNALS OF BOTANY. 2011;107(2):293–302.
MLA
De Ridder, Maaike, Jan Van den Bulcke, Dries Vansteenkiste, et al. “High-resolution Proxies for Wood Density Variations in Terminalia Superba.” ANNALS OF BOTANY 107.2 (2011): 293–302. Print.