COMPARISON OF DRY DEPOSITION AND CANOPY EXCHANGE OF BASE CATIONS IN TEMPERATE HARDWOOD FORESTS IN FLANDERS AND CHILE ESTUDIO COMPARATIVO DE LA DEPOSITACION SECA E INTERCAMBIO EN EL DOSEL DE LOS CATIONES DE BASE EN BOSQUES TEMPLADOS DE FLANDERS Y CHILE

Bulk precipitation, throughfall and stemflow of base cations Na+, K+, Mg2+ and Ca2+ were measured in two deciduous beech forests, located in regions with different air pollution characteristics and strongly differing in soil acidity and soil base saturation. The contribution of dry deposition and canopy leaching to net throughfall flux was estimated using Na+ as a tracer ion. The input of base cations via bulk precipitation was not significantly different between Nothofagus obliqua (Mirb.) Bl. in southern Chile and Fagus sylvatica L. in Flanders. However, net throughfall input of Ca2+ and Mg2+... Mehr ...

Verfasser: Jeroen Staelens
An De Schrijver
Carlos Oyarzún
Noël Lust
Dokumenttyp: Artikel
Erscheinungsdatum: 2003
Reihe/Periodikum: Gayana: Botanica, Vol 60, Iss 1, Pp 9-16 (2003)
Verlag/Hrsg.: Universidad de Concepción
Schlagwörter: Cationes de base / depositación atmosférica / dosel / Fagaceae / precipitación directa / Atmospheric deposition / base cations / forest canopy / throughfall / Botany / QK1-989
Sprache: Englisch
Spanish
Permalink: https://search.fid-benelux.de/Record/base-26694237
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : https://doaj.org/article/c3ff22dbfc714ffc8968e7acc1867da3

Bulk precipitation, throughfall and stemflow of base cations Na+, K+, Mg2+ and Ca2+ were measured in two deciduous beech forests, located in regions with different air pollution characteristics and strongly differing in soil acidity and soil base saturation. The contribution of dry deposition and canopy leaching to net throughfall flux was estimated using Na+ as a tracer ion. The input of base cations via bulk precipitation was not significantly different between Nothofagus obliqua (Mirb.) Bl. in southern Chile and Fagus sylvatica L. in Flanders. However, net throughfall input of Ca2+ and Mg2+ to the forest floor was significantly higher in Chile than in Flanders. Potassium fluxes were similar in both studied stands. Dry deposition of Ca2+ was higher in Chile, in absolute value as well as in relative contribution to net throughfall flux. A strong difference between the two Fagaceae-dominated forests was found for magnesium. In Chile, canopy leaching of Mg2+ (8.9 kg ha-1 y-1) was the major input source to the forest floor, while Mg2+ canopy leaching was close to zero in Flanders. As the availability of base cations in the soil solution determines the possibility of trees to exchange cations, we hypothesize that the lower Mg2+ canopy leaching in Flanders is mainly due to magnesium deficiency in the Flemish forest soil Se midieron las concentraciones de los cationes de base Na+, K+, Mg2+ y Ca2+ en la precipitación incidente, precipitación directa y escurrimiento fustal en dos bosques deciduos, localizados en regiones con diferente contaminación atmosférica, acidez del suelo y saturación de bases. La contribución de la depositación seca y el lavado del dosel en la precipitación efectiva se estimó utilizando el Na+ como un ion trazador. El ingreso de cationes de base vía precipitación incidente no fue significativamente diferente entre Nothofagus obliqua (Mirb.) Bl. en el sur de Chile y Fagus sylvatica L. en Flanders. Sin embargo, las entradas netas de Ca2+ y Mg2+ hacia el suelo del bosque fue significativamente ...