Identifying ontogenetic, environmental and individual components of forest tree growth

Chaubert-Pereira Florence, Caraglio Yves, Lavergne Christian, Guédon Yann. 2009. Identifying ontogenetic, environmental and individual components of forest tree growth. Annals of Botany, 104 (5) : 883-896.

Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Background and Aims: This study aimed to identify and characterize the ontogenetic, environmental and individual components of forest tree growth. In the proposed approach, the tree growth data typically correspond to the retrospective measurement of annual shoot characteristics (e.g. length) along the trunk. Methods: Dedicated statistical models (semi-Markov switching linear mixed models) were applied to data sets of Corsican pine and sessile oak. In the semi-Markov switching linear mixed models estimated from these data sets, the underlying semi-Markov chain represents both the succession of growth phases and their lengths, while the linear mixed models represent both the influence of climatic factors and the inter-individual heterogeneity within each growth phase. Key Results: On the basis of these integrative statistical models, it is shown that growth phases are not only defined by average growth level but also by growth fluctuation amplitudes in response to climatic factors and inter-individual heterogeneity and that the individual tree status within the population may change between phases. Species plasticity affected the response to climatic factors while tree origin, sampling strategy and silvicultural interventions impacted inter-individual heterogeneity. Conclusions: The transposition of the proposed integrative statistical modelling approach to cambial growth in relation to climatic factors and the study of the relationship between apical growth and cambial growth constitute the next steps in this research.

Mots-clés Agrovoc : arbre forestier, Pinus nigra, Quercus petraea

Mots-clés géographiques Agrovoc : Centre (France)

Classification Agris : U10 - Informatique, mathématiques et statistiques
F62 - Physiologie végétale - Croissance et développement
P40 - Météorologie et climatologie
K01 - Foresterie - Considérations générales

Champ stratégique Cirad : Axe 6 (2005-2013) - Agriculture, environnement, nature et sociétés

Auteurs et affiliations

• Chaubert-Pereira Florence, UM2 (FRA)
• Caraglio Yves, CIRAD-BIOS-UMR AMAP (FRA)
• Lavergne Christian, UM2 (FRA)
• Guédon Yann, CIRAD-BIOS-UMR DAP (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/551784/)

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