Bio-indication des contraintes hydriques stationnelles par la végétation forestière

Abstract : The determination and cartography of water stress exerted by the soil and climate on forest stands are high stakes in the context of global change. In situ measurement of soil water conditions is complex and localized. Therefore, forest vegetation could be a good indicator of the spatial and temporal drought's variations. Furthermore, the bio-indication is simple and inexpensive in comparison with the information provided. To validate and assess the estimation of water stress by the bio-indication, the study is based on unique data set collected in the Harth's forest (Alsace, France) and a soil water balance calculations including tree ecophysiological regulations. The results showed correct predictions of water stress to the community scale by the PLS (Partial Last Square) regression (r² = 0,67). The indicator system (Ellenberg and Landolt) or predictions to the species scale are less relevant for the prediction of water stress for the forest stand. To conclude, the bio-indication of water stress is complex and requires testing other methods and a study site with a wider range of drought's levels.
Document type :
Master thesis
File URL :
http://docnum.univ-lorraine.fr/prive/SCDSCI_M_2011_GOBIN_REMY.pdf
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https://hal.univ-lorraine.fr/hal-01789166
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Submitted on : Wednesday, May 9, 2018 - 5:48:09 PM
Last modification on : Tuesday, July 23, 2019 - 4:00:13 PM

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  • HAL Id : hal-01789166, version 1

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Rémy Gobin. Bio-indication des contraintes hydriques stationnelles par la végétation forestière. Sciences de l'environnement. 2011. ⟨hal-01789166⟩

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