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Dynamique d’une forêt de montagne méditerranéenne dans un monde changeant

Abstract : European landscapes. Since the 19th century, land-use changes, notably in mountain areas, have led to the expansion of shrub and forest areas and the decrease of semi-natural open habitats and its diversity. Sustainable management of these former agricultural areas requires an historical understanding of the mechanisms influencing the expansion of forested areas to predict future vegetation pathways. This is why we focussed on the study of forest dynamics in the French Pre-Alps, most particularly in the Montagne du Malay (Var), where the military camp of Canjuers is located. Our approach combines analysis of i) local land-use history by means of textual archives; and ii) forest density, dynamics and diversity via dendrochronological analysis. We also analyse the potential role of domestic and wild ungulates to control forest expansion and to preserve grassland. Main results show that land-use played, and still plays, a major role on the dynamics, structure and diversity of present-day forested areas. Different former land-uses favoured local disappearance of certain species and/or overabundance of others thus leading to different forest composition. On the other hand, the timing and location of land abandonment led to different forest dynamics. Concerning management, present ungulate density in the study site does not allow controlling forest expansion. Other management practices should thus be considered
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  • HAL Id : tel-02822296, version 1
  • PRODINRA : 50207



Sandrine Chauchard. Dynamique d’une forêt de montagne méditerranéenne dans un monde changeant. Biodiversité et Ecologie. Université Montpellier 2 (Sciences et Techniques), 2007. Français. ⟨tel-02822296⟩



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