DUPIRE, S.; CURT, Thomas; BIGOT, Sylvain; FRÉJAVILLE, Thibaut

doi:10.1007/s10342-019-01206-1

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DUPIRE, S.
Laboratoire des EcoSystèmes et des Sociétés en Montagne [UR LESSEM]

CURT, Thomas
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture [IRSTEA]

BIGOT, Sylvain
Institut des Géosciences de l’Environnement [IGE]

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European Journal of Forest Research. 2019-06-19, vol. 138, n° 5, p. 813-830

Springer Verlag

Résumé en anglais

Forest fires are expected to be more frequent and more intense with climate change, including in temperate and mountain forest ecosystems. In the Alps, forest vulnerability to fire resulting from interactions between climate, fuel types, vegetation structure, and tree resistance to fire is little understood. This paper aims at identifying trends in the vulnerability of Alpine forest ecosystems to fire at different scales (tree species, stand level and biogeographic level) and according to three different climatic conditions (cold season, average summer and extremely dry summer). To explore Alpine forest vulnerability to fire, we used surface fuel measurements , forest inventory and fire weather data to simulate fire behaviour and ultimately post-fire tree mortality across 4438 forest plots in the French Alps. The results showed that cold season fires (about 50% of the fires in the French Alps) have a limited impact except on low elevation forests of the Southern Alps (mainly Oak, Scots pine). In average summer conditions, mixed and broadleaved forests of low elevations suffer the highest mortality rates (up to 75% in coppices). Finally, summer fires occurring in extremely dry conditions promote high mortality across all forest communities. LowS. Dupire Univ.< Réduire

Mots clés en anglais

Alps

Mountain forest

Climate change

Vulnerability

Forest fire

Tree mortality

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Vulnerability of forest ecosystems to fire in the French Alps

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