Impact du changement climatique sur le hêtre et l'épicéa, le long d'un gradient altitudinal

Abstract : This study aims to investigate the effect of climate change on beech (Fagus sylvatica) and spruce (Picea abies), two key species of forest economics Switzerland. To simulate climate changes in real time and under natural conditions for the species, an altitudinal gradient was used in the Swiss Jura. The site is located over 1340m altitude and the last site near the shores of Lake Geneva to 340m. Seedlings from Col du Marchairuz (1340m) have been transplanted along the altitudinal gradient. Measures gas exchange, water potential and fluorescence were performed at court four measurement campaigns. For these parameters, no effect altitude has been shown for the same species. However at the same altitude, the two species respond differently, and the last two are not the same adaptability. For both sites high altitudes, the performance of spruce do not seem to be altered, nor beech. However, for the last two sites beech appears to have superior performance to that of spruce. These results let us assume that the two species do not have the same powers to tackle climate change adaptations, spruce seems to have more difficulty than beech against global warming.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2012_BERTHELON_CLAIRE.pdf
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Claire Berthelon. Impact du changement climatique sur le hêtre et l'épicéa, le long d'un gradient altitudinal. Sciences de l'environnement. 2012. ⟨hal-01869759⟩

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