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TEMPORAL VARIATION OF THE RING WIDTH–WOOD DENSITY RELATIONSHIP IN NORWAY SPRUCE GROWN UNDER TWO LEVELS OF ANTHROPOGENIC DISTURBANCE

TEMPORAL VARIATION OF THE RING WIDTH–WOOD DENSITY RELATIONSHIP IN NORWAY SPRUCE GROWN UNDER TWO... The ring width–wood density relationship (RW–WDR) is somewhat controversial. Most of the literature reports negative, but weak relationships, while others found no significant relationships at all. This study analyses the RW–WDR using a dataset of twenty even-aged Norway spruce trees grown at two different levels of air pollution in the Eastern Ore Mountains, Germany. Ring width, latewood proportion and wood density were measured in each tree ring. The year-to-year (temporal) variability of the RW–WDR was calculated by sequentially taking the rings grown in the same calendar year in trees within a site. In addition, RW–WDR was also calculated across tree rings (pith to bark) of given trees. During the observed period, the temporal RW–WDR fluctuated between negative and positive correlations with certain climatic patterns, as well as forest operations, playing a prominent role. It was shown that increased late-season rainfall favoured a more positive relationship. The temporal RW–WDR illustrated, for given trees of a site, that smaller rings formed in certain years might be related to higher wood density while other years may result to lower wood density. This finding is useful for an improved understanding regarding the effect of ring width on wood density. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png IAWA Journal Brill

TEMPORAL VARIATION OF THE RING WIDTH–WOOD DENSITY RELATIONSHIP IN NORWAY SPRUCE GROWN UNDER TWO LEVELS OF ANTHROPOGENIC DISTURBANCE

IAWA Journal , Volume 24 (1): 9 – Jan 1, 2003

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0928-1541
eISSN
2294-1932
DOI
10.1163/22941932-90000320
Publisher site
See Article on Publisher Site

Abstract

The ring width–wood density relationship (RW–WDR) is somewhat controversial. Most of the literature reports negative, but weak relationships, while others found no significant relationships at all. This study analyses the RW–WDR using a dataset of twenty even-aged Norway spruce trees grown at two different levels of air pollution in the Eastern Ore Mountains, Germany. Ring width, latewood proportion and wood density were measured in each tree ring. The year-to-year (temporal) variability of the RW–WDR was calculated by sequentially taking the rings grown in the same calendar year in trees within a site. In addition, RW–WDR was also calculated across tree rings (pith to bark) of given trees. During the observed period, the temporal RW–WDR fluctuated between negative and positive correlations with certain climatic patterns, as well as forest operations, playing a prominent role. It was shown that increased late-season rainfall favoured a more positive relationship. The temporal RW–WDR illustrated, for given trees of a site, that smaller rings formed in certain years might be related to higher wood density while other years may result to lower wood density. This finding is useful for an improved understanding regarding the effect of ring width on wood density.

Journal

IAWA JournalBrill

Published: Jan 1, 2003

Keywords: Wood quality; wood density; ring width; latewood proportion; climate; precipitation; X-ray densitometry; air pollution

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