Découvrir la revue Citer cet article Lafortune, M., Filion, L. & Hétu, B. (1997) Géographie physique et Quaternaire, 1997, vol. 51, no 1, p. 1-15, 8 ABSTRACT Dynamics of a forest edge on an active scree slope occurring in a cold temperate climate environment (Gaspé Peninsula, Québec). The development of the forest vegetation on a scree slope located in the valley of Rivière à Pierre, Gaspé Peninsula, was reconstructed over the last two centuries. It was established from dendroecological data that the forest limit was lower than its present position around 1850 and that the forest cover expanded until the middle of the 20th century, in spite of evidence for slope instability at the end of the 19th century. After 1950, the forest edge retreated to its present position. Annual sedimentation rates were calculated by using dendrogeomorphological methods. They were lowest (< 0.1 cm/year) during the second half of the 19th century, and increased to 0.5 cm/year during the 20th century, and up to 1.0 cm/year after 1975. Increased slope activity was likely associated with a higher frequency of frost-coated clast flows. ZUSAMMENFASSUNG
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