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Le mélange des espèces réduit la sensibilité à la sécheresse du pin sylvestre (Pinus sylvestris L.) et du chêne (Quercus robur L., Quercus petraea (Matt.) Liebl.) - L'approvisionnement en eau et la fertilité du site modifient l'effet de mélange

By M. Steckel, Macarena Del Río, M. Heym, J. Aldea, K. Bielak, G. Brazaitis, J. Cerny, L. Coll, Catherine Collet, M. Ehbrecht, A. Jansons, A. Nothdurft, M. Pach, M. Pardos, Quentin Ponette, D.O.J. Reventlow, R. Sitko, M. Svoboda, Patrick Vallet, B. Wolff and Hans Pretzsch

Abstract

International audienceTree species mixing has been widely promoted as a promising silvicultural tool for reducing drought stress. However, so far only a limited number of species combinations have been studied in detail, revealing inconsistent results. In this study, we analysed the effect of mixing Scots pine and oak (pedunculate oak and sessile oak) trees on their drought response along a comprehensive ecological gradient across Europe. The objective was to improve our knowledge of general drought response patterns of two fundamental European tree species in mixed versus monospecific stands. We focused on three null hypotheses: (HI ) tree drought response does not differ between Scots pine and oak, (HII ) tree drought response of Scots pine and oak is not affected by stand composition (mixture versus monoculture) and (HIII ) tree drought response of Scots pine and oak in mixtures and monocultures is not modified by tree size or site conditions. To test the hypotheses, we analysed increment cores of Scots pine and oak, sampled in mixed and monospecific stands, covering a wide range of site conditions

Topics: [SDE]Environmental Sciences
Publisher: 'Elsevier BV'
Year: 2020
DOI identifier: 10.1016/j.foreco.2020.117908
OAI identifier: oai:HAL:hal-02610246v1
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