Modélisation de la croissance saisonnière du chêne et du hêtre

Abstract : In the current context of climate change, understanding which the climate, phenology and intrinsic factors controlling the seasonal stem growth is a key issue for forest managers. The analysis of intra- and inter-annual stem increments measured with micro-dendrometers of 17 consecutive years through a modeling approach helped to interpret these different factors influencing stem increment of oak and beech. The Gompertz equation was used to adjust the increments measured at 3 sites-treatments (thinning beech, thinning oak and control oak), and the parameters of the equation were interpreted. At the interannual scale, photosynthesis of current or previous years, water deficit or starting day of water deficit, the LAI, rainfall and temperature influence the growth throughout the year or at a particular stage (for example the initiation of growth). At the intra-annual scale, temperature, soil water deficit and rain fully explain the momentum of growth. The water balance seems to drive the growth episodes bringing a critical issue of climate in the future for forest productivity.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2014_GROSDIDIER_MARIE.pdf
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Marie Grosdidier. Modélisation de la croissance saisonnière du chêne et du hêtre. Sciences de l'environnement. 2014. ⟨hal-01881176⟩

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