test_moissonnage_selune
type: Agent

Vulnerability of silver fir (Abies alba Mill.) to drought in Mediterranean mountains according to soil properties
type: Distribution
access URL: https://theses.hal.science/tel-00927093
format: HTML
issued: 2026-05-07T13:23:59.585645
modified: 2026-05-07T13:23:59.555190

Vulnerability of silver fir (Abies alba Mill.) to drought in Mediterranean mountains according to soil properties
type: Dataset
contact point: Organization
  fn: CCSD
keyword: infrarouge-thermique
keyword: fonctionnement-hydrique
keyword: reserve-hydrique-du-sol
keyword: sdvsalife-sciences-q-bioagricultural-sciences
keyword: secheresse
keyword: soil-water
keyword: modeling
keyword: modelisation
keyword: theses
keyword: infoeu-reposemanticsdoctoralthesis
keyword: silver-fir
keyword: sapin-pectine
keyword: teledetection
keyword: remote-sensing
keyword: thermal-infrared
keyword: running-water
keyword: dry
landing page: https://theses.hal.science/tel-00927093
description: Many reports of deaths of silver fir (Abies alba Mill.) are mentioned at the southern limit of its limit of distribution in Provence and appear to be related to the successive droughts of the last decade and to the distribution of soil water properties. The aim of the study is then to better assess the impact of water stress on ecophysiological functioning of this species and to characterize and map the areas more vulnerable to drought. On the Mont Ventoux, an experiment was set up to monitor for 3 years ecophysiological parameters involved in the water behaviour of silver fir on plots where soil properties were characterized. On this type of karstic mountain, soils depth is highly variable and, at forest stand scale, mortality rates and intensities of water stress were higher on soils with greater water reserve. In addition, a post-effect of the drought of 2009 was observed by reducing transpiration of the following year. A mechanistic modelling approach was then adopted by integrating new formalisms of root dynamics to take into account this post-effect. It was evaluated on various parameters involved in the water and carbon cycles of trees and the model was validated on the dynamics of transpiration and on annual rings width increment of tree trunks.Indices based on measured surface temperature were used to assess the possibility of detecting water stress in forests. At tree scale, there is a residual variability due to climatic factors and to the small size of the measurement surface in the relationship between transpiration and surface temperature. At the mountainside scale, surface temperature indices allowed identifying the spatial distribution of the duration and intensity of water stress according to the typology of soil done. Remote sensing in the thermal infrared could then be a useful tool for forest management.
identifier: NNT: 2012AVIG0646
issued: 2026-05-07T13:23:59.576154
language: fr
modified: 2026-05-07T13:23:59.576159