Journal
COMPTES RENDUS BIOLOGIES
Volume 337, Issue 6, Pages 391-398Publisher
ACAD SCIENCES
DOI: 10.1016/j.crvi.2014.05.002
Keywords
Tree growth and annual rings; Wood density; Computed tomography scanning; Three-dimensional approach and directional variation; Graphical and quantitative analyses
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada through a Discovery Grant [138514-10]
- Canadian Wood Fibre Centre through research fund
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Tree growth, as measured via the width of annual rings, is used for environmental impact assessment and climate back-forecasting. This fascinating natural process has been studied at various scales in the stem (from cell and fiber within a growth ring, to ring and entire stem) in one, two, and three dimensions. A new approach is presented to study tree growth in 3D from stem sections, at a scale sufficiently small to allow the delineation of reliable limits for annual rings and large enough to capture directional variation in growth rates. The technology applied is computed tomography scanning, which provides - for one stem section - millions of data (indirect measures of wood density) that can be mapped, together with a companion measure of dispersion and growth ring limits in filigree. Graphical and quantitative analyses are reported for white spruce trees with circular vs non-circular growth. Implications for dendroclimatological research are discussed. (C) 2014 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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