My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in JEQ

  1. Vol. 30 No. 5, p. 1747-1756
     
    Received: May 4, 2000
    Published: Sept, 2001


    * Corresponding author(s): n.b.dise@open.ac.uk
 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/jeq2001.3051747x

Aluminum Output Fluxes from Forest Ecosystems in Europe

  1. N. B. Dise *a,
  2. E. Matznerb,
  3. M. Armbrusterb and
  4. J. MacDonalda
  1. a Dep. of Earth Sciences, The Open Univ., Milton Keynes, MK7 6AA, UK
    b Dep. of Soil Ecology, Bayreuth Institute for Terrestrial Ecosystem Research (BITÖK), Univ. of Bayreuth, D-95440 Bayreuth, Germany

Abstract

Data from 89 forested catchments and plots across Europe were used to define empirical relationships between aluminum leaching and input fluxes of major ions, output fluxes of major ions, ecosystem parameters such as soil pH, and combinations of these. Forests that release dissolved Al to seepage or surface waters are located primarily in areas receiving the highest loading of acid rain, and the output flux of Al shows the highest correlations to the throughfall flux of inorganic nitrogen, the output fluxes of NO 3, H+, and SO2− 4, and the mineral soil pH. If the speciation of Al is taken to be Al3+ (an overestimate), Al is released in a nearly 1:1 molar charge ratio with the sum of NO 3 and SO2− 4 in runoff or seepage water over a wide range of base-poor bedrock types and acid deposition across Europe. The empirical data point to a threshold range of N deposition of 80 to 150 mmolc N m−2 yr−1 and a (less clearly defined) range of S deposition of 100 to 200 mmolc SO2− 4 m−2 yr−1 above which Al released from forests exceeds 100 mmolc Al m−2 yr−1 Within this threshold range, the sites that release little or no dissolved Al are those that continue to assimilate input N and/or have high soil pH (>4.5).

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © 2001. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyPublished in J. Environ. Qual.30:1747–1756.