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.
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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 |
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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 |
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Dernière modification: | 15 août 2023 16:08 |
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