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,
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 |
Éditer le document (administrateurs uniquement)