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

PhenoCaB : a new phenological model based on carbon balance in boreal conifers

Cartenì Fabrizio, Balducci Lorena, Dupont Alain, Salucci Emiliano, Néron Valérie, Mazzoleni Stefano et Deslauriers Annie. (2023). PhenoCaB : a new phenological model based on carbon balance in boreal conifers. New Phytologist,

[thumbnail of New Phytologist - 2023 - Carten - PhenoCaB  a new phenological model based on carbon balance in boreal conifers.pdf]
Prévisualisation
PDF - Version publiée
Disponible sous licence Creative Commons (CC-BY 2.5).

1MB

URL officielle: http://dx.doi.org/doi:10.1111/nph.18974

Résumé

Traditional phenological models use chilling and thermal forcing (temperature sum or degree-days) to predict budbreak. Because of the heightening impact of climate and other related biotic or abiotic stressors, a model with greater biological support is needed to better predict budbreak.

Here, we present an original mechanistic model based on the physiological processes taking place before and during budbreak of conifers. As a general principle, we assume that phenology is driven by the carbon status of the plant, which is closely related to environmental variables and the annual cycle of dormancy-activity. The carbon balance of a branch was modelled from autumn to winter with cold acclimation and dormancy and from winter to spring when deacclimation and growth resumption occur.

After being calibrated in a field experiment, the model was validated across a large area (> 34 000 km 2 ), covering multiple conifers stands in Québec (Canada) and across heated plots for the SPRUCE experiment in Minnesota (USA). The model accurately predicted the observed dates of budbreak in both Québec (±3.98 d) and Minnesota (±7.98 d).

The site-independent calibration provides interesting insights on the physiological mechanisms underlying the dynamics of dormancy break and the resumption of vegetative growth in spring.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0028-646X
Version évaluée par les pairs:Oui
Date:2023
Identifiant unique:10.1111/nph.18974
Sujets:Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
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:balsam fir, black spruce, bud phenology, defoliation, mechanistic model, spruce budworm
Déposé le:07 juin 2023 18:34
Dernière modification:07 juin 2023 18:34
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