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Influence de la disponibilité en lumière et de la taille sur les attributs fonctionnels et le bilan de carbone de l'arbre

Abstract : At the individual tree scale, species shade tolerance abilities are govemed by the sum of numerous traits, which, in tum, define tree carbon balance. ln this study, contrasting scales of processes (leaf physiology, crown morphology and biomass partitioning) as weIl as the individual integrated functioning (light interception efficiency, above- and below-ground gas exchanges) were studied on sugar maple (Acer saccharum Marsh., a shade tolerant species) and yellow birch (Betula allghaniensis _ritt., a mid shade tolerant species). Results showed the additional importance of individual size, alone or in interaction with light availability, in the variation of seedling performance. Thus, species shade tolerance may not be constant during whole tree life span and may be highly dependent on the size reached by an individual under any given light environment.
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https://hal.univ-lorraine.fr/tel-01748115
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Sylvain Delagrange. Influence de la disponibilité en lumière et de la taille sur les attributs fonctionnels et le bilan de carbone de l'arbre. Sylviculture, foresterie. Université Henri Poincaré - Nancy 1, 2004. Français. ⟨NNT : 2004NAN10111⟩. ⟨tel-01748115⟩

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