Publications des scientifiques de l'IRD

Carrière S. D., Martin-StPaul N. K., Cakpo C. B., Patris Nicolas, Gillon M., Chalikakis K., Doussan C., Olioso A., Babic M., Jouineau A., Simioni G., Davi H. (2020). The role of deep vadose zone water in tree transpiration during drought periods in karst settings - Insights from isotopic tracing and leaf water potential. Science of the Total Environment, 699, p. art. 134332 [10 p.]. ISSN 0048-9697.

Titre du document
The role of deep vadose zone water in tree transpiration during drought periods in karst settings - Insights from isotopic tracing and leaf water potential
Année de publication
2020
Type de document
Article référencé dans le Web of Science WOS:000500583400072
Auteurs
Carrière S. D., Martin-StPaul N. K., Cakpo C. B., Patris Nicolas, Gillon M., Chalikakis K., Doussan C., Olioso A., Babic M., Jouineau A., Simioni G., Davi H.
Source
Science of the Total Environment, 2020, 699, p. art. 134332 [10 p.] ISSN 0048-9697
Karst environments are unusual because their dry, stony and shallow soils seem to be unfavorable to vegetation, and yet they are often covered with forests. How can trees survive in these environments? Where do they find the water that allows them to survive? This study uses midday and predawn water potentials and xylem water isotopes of branches to assess tree water status and the origin of transpired water. Monitoring was conducted during the summers of 2014 and 2015 in two dissimilar plots of Mediterranean forest located in karst environments. The results show that the three monitored tree species (Abies alba Mill, Fagus sylvatica L, and Quercus ilex L.) use deep water resources present in the karst vadose zone (unsaturated zone) more intensively during drier years. Quercus ilex, a species well- adapted to water stress, which grows at the drier site, uses the deep water resource very early in the summer season. Conversely, the two other species exploit the deep water resource only during severe drought. These results open up new perspectives to a better understanding of ecohydrological equilibrium and to improved water balance modeling in karst forest settings.
Plan de classement
Hydrologie [062] ; Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
ZONE MEDITERRANEENNE
Localisation
Fonds IRD [F B010077399]
Identifiant IRD
fdi:010077399
Contact