TAILIEUCHUNG - Báo cáo khoa học: "The effect of light acclimation of single leaves on whole tree growth and competition – an application of the tree growth model ALMIS"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: The effect of light acclimation of single leaves on whole tree growth and competition – an application of the tree growth model ALMIS. | 599 Ann. For. Sci. 57 2000 599-609 INRA EDP Sciences Original article The effect of light acclimation of single leaves on whole tree growth and competition - an application of the tree growth model ALMIS Christiane Eschenbach Ecology Center of the University of Kiel Schauenburger Str. 112 D-24118 Kiel Germany Received 29 June 1999 accepted 15 February 2000 Abstract - Black alder Alnus glutinosa L. Gaertn. is a light-demanding fast growing tree species widespread but always restricted to wet habitats. Because no sun and shade leaves can be distinguished within the alder crown the question arises whether these specific photosynthetic characteristics may contribute to alder s low competitiveness. A functional-structural tree growth model ALMIS based on an object oriented approach was developed and parameterized using data from extensive investigations of an alder forest in Northern Germany. The basic model structure is described especially focusing on carbon dynamics. ALMIS was used to study the effects of light acclimation of single leaves on whole plant growth and competition. Different photosynthetic types were simulated to grow either in isolation or in competition which each other. When grown in isolation over an extended period a model tree with exclusively shade leaves accumulated less total biomass than one with exclusively sun leaves but a tree with the capacity to acclimate the leaves to the low light conditions in the inner crown grew the most. Inter-tree competition enhanced the advantage of leaf acclimation for whole plant growth. functional-structural growth model photosynthesis acclimation shade leaves Alnus glutinosa Résumé - Effets de l adaptation des feuilles à la lumière sur la croissance globale de l arbre et la competition - une application du modèle de croissance ALMIS. L Aulne noir Alnus glutinosa L. Gaertn. est une espèce à croissance rapide exigeante en lumière. Elle est répandue mais toujours localisée aux habitats humides. Comme il n est pas

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