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

Greater tree species diversity and lower intraspecific competition attenuate impacts from temperature increases and insect epidemics in boreal forests of western Quebec, Canada

Chavardès Raphaël D., Balducci Lorena, Bergeron Yves, Grondin Pierre, Poirier Véronique, Morin Hubert et Gennaretti Fabio. (2023). Greater tree species diversity and lower intraspecific competition attenuate impacts from temperature increases and insect epidemics in boreal forests of western Quebec, Canada. Canadian Journal of Forest Research, 53, (1), p. 48-59.

[thumbnail of Chavardes_etal_2023_CanJForRes.pdf]
Prévisualisation
PDF - Version publiée
Disponible sous licence Creative Commons Attribution (CC-BY 2.5).

2MB

URL officielle: http://dx.doi.org/doi:10.1139/cjfr-2022-0114

Résumé

We investigated how the surrounding environment influences the growth of dominant trees and their responses to temperature and insect epidemics in boreal forests of eastern Canada. We focused on 82 black spruce and jack pine focal trees in stands spanning a double gradient of species diversity and soil texture within a 36 km2 area of western Quebec. For these trees, we compared their diameter at breast height, growth rates, temperature–growth relations, and growth during insect defoliator epidemics. We used linear models to study how surrounding tree attributes and soil properties affected the growth of focal trees. Models showed that tree growth responses and responses to temperature and insect epidemics were generally negative with higher intraspecific competition and positive with greater tree species diversity. Growth of both species benefitted from lower soil sand content. Our research offers novel insights on the potential role of the surrounding environment, notably tree competition and species diversity, in mitigating the vulnerability of eastern Canada's boreal trees to anthropogenic climate change and insect epidemics.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0045-5067
Volume:53
Numéro:1
Pages:p. 48-59
Version évaluée par les pairs:Oui
Date:2023
Identifiant unique:10.1139/cjfr-2022-0114
Sujets:Sciences naturelles et génie > Sciences appliquées > Climatologie et météorologie
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:basal area increments, forest tent caterpillar, growing season length, eastern spruce budworm, summer heat stress
Déposé le:05 juill. 2023 12:33
Dernière modification:15 août 2023 16:08
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