The water status of six woody species coexisting in the Sahel (Ferlo, Senegal)
Berger, A.; Grouzis, M.; Fournier, C.
Journal of Tropical Ecology 12(5): 607-627
ISSN/ISBN: 0266-4674 DOI: 10.1017/s0266467400009834
In the Sahel during recent decades, anthropogenic disturbance and periods of drought have caused changes in woody species frequency. The internal water status of six coexisting species was analysed to estimate the importance of water constraints in this process. Predawn and midday xylem pressure potential and stomatal conductance were monitored monthly for two years. The relations between xylem pressure potential and transpiration made it possible to determine the hydraulic conductivity of the soil-plant system. Two types of results were obtained. First, there was considerable diversity in water status of the different species.