Reference : RELATIVE IMPORTANCE OF FACTORS CONTROLLING THE LEACHING AND UPTAKE OF INORGANIC-IONS IN ...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/28931
RELATIVE IMPORTANCE OF FACTORS CONTROLLING THE LEACHING AND UPTAKE OF INORGANIC-IONS IN THE CANOPY OF A SPRUCE FOREST
English
Hambuckers, Alain mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Taxonomie végétale et biologie de la conservation >]
Remacle, Jean mailto [Université de Liège - ULg > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences) >]
1993
Biogeochemistry
Springer Science & Business Media B.V.
23
2
99-117
Yes (verified by ORBi)
International
0168-2563
Dordrecht
The Netherlands
[en] Sequential sampling of precipitation under mature spruce trees and time-series analysis of the data were performed in order to assess, in natural conditions, the relative importance of different factors that could influence the leaching and uptake of inorganic ions in the canopy. Eleven rain events were analyzed in order to estimate how external factors, rain intensity, H+, and ionic concentration of the incident rain influence the ionic throughfall concentrations and the net throughfall fluxes. The results led to the conclusion that leaching or uptake mostly occur by diffusion. The influence of the open rain acidity was not conclusive; however, it was shown that the tested external factors only controlled a few percent of the variation of the data. By contrast, the autocorrelation of the data always explained a large portion of the variance. lt could result from the gradual changes in the course time of internal factors related to the exchange system including waxes, cuticles, apoplast and xylem sap. These constituents were known to control the exchange at the canopy surface and to be sensitive to the plant physiology and environmental conditions.
Researchers ; Professionals
http://hdl.handle.net/2268/28931

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