Sylvigenèse de la hêtraie-sapinière dans le contexte vosgien

Abstract : Forest dynamics were analyzed in the Upper Vosges mountains of north-eastern France in two reserve areas, Frankenthal-Missheimle (FM) and Grand Ventron (GV), located in the Ballons des Vosges Natural Regional Park (Parc Naturel Régional des Ballons des Vosges). The main aim of the study was to interpret how the different species populations in mixed-beech woodlands in the Vosges grow and interact over the long term, and to determine the disturbance history. The study combined vegetation description, dendrological and structural data, architectural descriptions, soil analysis, dendrochronolgy and seed bank studies. Historical information was also taken into consideration. Observations were correlated to the sylvigenetic processes of a primary forest of the Carpates. It appeared the forest mosaics of these communities were very stable in regards of the harsh environmental conditions near the timberline. Forests presented an architecture highly influenced by slope orientation. Furthermore, seed bank study and dendrological approach. The seed bank and dendrochronological study displayed information of human perturbations: forest canopy often opened in the beginning of the 19th century has highly influenced forest architecture and seed bank composition. However, the mixed beech-fir species were slowly integrated in the seed-bank, to the detriment of lightdemanding species, belonging to past forest perturbations. That substitution attempted that forest evolved to a more naturalness forest. Consequently, these forests can be regarded as reference study area, in order of naturalness and development of beech-fir forest which were growing near the timberland.
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Déborah Closset-Kopp. Sylvigenèse de la hêtraie-sapinière dans le contexte vosgien. Sciences agricoles. Université Paul Verlaine - Metz, 2004. Français. ⟨NNT : 2004METZ024S⟩. ⟨tel-01750089⟩

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