Multi-stemming and mechanics of trees and shrubs growing along avalanche paths

Mine François-Xavier, Stokes Alexia, Brancheriau Loïc. 2009. Multi-stemming and mechanics of trees and shrubs growing along avalanche paths. In : Proceedings of the Sixth Plant Biomechanics Conference, November 16th - 21th, Cayenne, French Guyana. Thibaut Bernard (ed.). UMR Ecofog. Kourou : ECOFOG, 456-462. Plant Biomechanics Conference. 6, Cayenne, Guyane française, 16 Novembre 2009/21 Novembre 2009.

Résumé : We measured dynamic modulus of elasticity (Ed) and bending strength (?) for several tree species growing in or around an avalanche path in the French Alps. Species were single- or multi-stemmed, the latter being more abundant at the centre or edges of the path. #Alnus viridis#, generally found at the centre of avalanche paths, had the lowest Ed and ?, and was strongly multi-stemmed, thus allowing this species to bend during an avalanche or to resprout if damaged. In several species where stem bases were procumbent after snow damage, Ed increased with height up the stem, conferring a mechanical advantage on these young stems which need to grow quickly upwards and dominate the canopy. Ed did not change along stems in #Corylus avellana#, a multi-stemmed shrub with stems often leaning on each other, thus providing mutual support, as also found in semi self-supporting plants.

Classification Agris : F50 - Anatomie et morphologie des plantes
K01 - Foresterie - Considérations générales
H50 - Troubles divers des plantes

Auteurs et affiliations

• Mine François-Xavier, ISARA (FRA)
• Stokes Alexia, INRA (FRA)
• Brancheriau Loïc, CIRAD-PERSYST-UPR Bois tropicaux (FRA) ORCID: 0000-0002-9580-7696

Source : Cirad - Agritrop (https://agritrop.cirad.fr/554452/)

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