Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

Wood quality of black spruce and balsam fir trees defoliated by spruce budworm : a case study in the boreal forest of Quebec, Canada

Paixao Carlos Eduardo, Krause Cornelia, Morin Hubert et Achim Alexis. (2019). Wood quality of black spruce and balsam fir trees defoliated by spruce budworm : a case study in the boreal forest of Quebec, Canada. Forest Ecology and Management, 437, p. 201-210.

Le texte intégral n'est pas disponible pour ce document.

URL officielle:


Spruce budworm (SBW – Choristoneura fumiferana Clem.) is one of the most damaging defoliating insects in the coniferous forests of eastern North America. In Canada, the widely distributed balsam fir (Abies balsamea L. (Mill)) and black spruce (Picea mariana B.S.P. (Mill)) are its most important hosts. Defoliation by SBW reduces growth in the host trees and can lead to host mortality. Although SBW impacts on growth are well documented, much less is known about changes in wood properties resulting from defoliation. To address this knowledge gap, we sampled 36 SBW-infested stands located in the boreal forest of Quebec (Canada) to determine whether defoliation modifies the wood quality of affected trees. The selected stands had been subjected to one to four years of SBW defoliation. For both species, we assessed ring growth, wood density, and the anatomical characteristics of stem wood formed during the outbreak years. We determined that rings formed during the SBW outbreak had a significant and progressive loss of biomass production with a longer duration of defoliation. SBW significantly reduced latewood density in the second and third year of defoliation for black spruce and the third and fourth year for balsam fir. Average ring density was reduced only in black spruce and only after four years of defoliation. The observed changes in growth and density were associated with changes in anatomical features. While the cellular characteristics of the earlywood remained fairly constant, significant reductions occurred in latewood cell-wall thickness after three years of defoliation. Our study shows that not only do SBW outbreaks reduce annual radial growth, but the cellular characteristics in latewood cells are also modified momentarily. Thus, SBW outbreaks affect wood density and quality in both black spruce and balsam fir.

Type de document:Article publié dans une revue avec comité d'évaluation
Pages:p. 201-210
Version évaluée par les pairs:Oui
Identifiant unique:10.1016/j.foreco.2019.01.032
Sujets:Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Départements et modules > Département des sciences fondamentales
Mots-clés:spruce budworm outbreak, wood quality, picea mariana, abies balsamea, growth reduction, wood density, lumen area, cell-wall thickness, earlywood, latewood
Déposé le:31 mai 2023 13:08
Dernière modification:31 mai 2023 13:08
Afficher les statistiques de telechargements

Éditer le document (administrateurs uniquement)

Creative Commons LicenseSauf indication contraire, les documents archivés dans Constellation sont rendus disponibles selon les termes de la licence Creative Commons "Paternité, pas d'utilisation commerciale, pas de modification" 2.5 Canada.

Bibliothèque Paul-Émile-Boulet, UQAC
555, boulevard de l'Université
Chicoutimi (Québec)  CANADA G7H 2B1
418 545-5011, poste 5630