Research output

The response of soil solution chemistry in European forests to decreasing acid deposition

Research output: Contribution to journalA1: Web of Science-article


  • James Johnson
  • Elisabeth Graf Pannatier
  • Stefano Carnicelli
  • Guia Cecchini
  • Nicholas Clarke
  • Karin Hansen
  • Henning Meesenburg
  • Tiina M Nieminen
  • Gunilla Pihl Karlsson
  • Hugues Titeux
  • Elena Vanguelova
  • Lars Vesterdal
  • Peter Waldner
  • Mathieu Jonard

Departments, research groups and services

External Organisations

  • School of Agriculture and Food Science, University College Dublin, Belfield, Dublin, Ireland.
  • WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland.
  • Earth Sciences Department, University of Florence, Via La Pira 4, 50125, Firenze, Italy.
  • Norwegian Institute of Bioeconomy Research, P.O. Box 115, N-1431, Ås, Norway.
  • Swedish Environmental Protection Agency, SE-106 48, Stockholm, Sweden.
  • Northwest German Forest Research Institute, Grätzelstrasse 2, D-37079, Göttingen, Germany.
  • Natural Resources Institute Finland Luke, Latokartanonkaari 9, 00790, Helsinki, Finland.
  • IVL Swedish Environmental Research Institute, Box 530 21, SE-400 14, Göteborg, Sweden.
  • UCL-ELI Université Catholique de Louvain, Earth and Life Institute, Croix du Sud 2, L7.05.09, BE-1348, Louvain-la-Neuve, Belgium.
  • Centre for Ecosystem, Society and Biosecurity, Forest Research, Farnham, Surrey, GU10 4LH, UK.
  • Department of Geosciences and Natural Resource Management, University of Copenhagen, Rolighedsvej 23, DK-­‐1958 Frederiksberg C, Denmark
  • Research Institute for Nature and Forest (INBO), Havenlaan 881000, Brussels, Belgium.


Original languageEnglish
JournalGlobal Change Biology
Pages (from-to)3606-3619
Publication statusPublished - 3-Jul-2018


Acid deposition arising from sulphur (S) and nitrogen (N) emissions from fossil fuel combustion and agriculture has contributed to the acidification of terrestrial ecosystems in many regions globally. However, in Europe and North America, S deposition has greatly decreased in recent decades due to emissions controls. In this study we assessed the response of soil solution chemistry in mineral horizons of European forests to these changes. Trends in pH, acid neutralising capacity (ANC), major ions, total aluminium (Altot), and dissolved organic carbon (DOC) were determined for the period 1995-2012. Plots with at least 10 years of observations from the ICP Forests monitoring network were used. Trends were assessed for the upper mineral soil (10-20 cm, 104 plots) and subsoil (40-80 cm, 162 plots). There was a large decrease in the concentration of sulphate (SO42-)in soil solution; over a ten-year period (2000-2010), SO42- decreased by 52% at 10-20 cm and 40% at 40-80 cm. Nitrate was unchanged at 10-20 cm but decreased at 40-80 cm. The decrease in acid anions was accompanied by a large and significant decrease in the concentration of the nutrient base cations, calcium, magnesium and potassium (Bc = Ca2++ Mg2++ K+) and Altotover the entire dataset. The response of soil solution acidity was non-uniform. At 10-20 cm, ANC increased in acid-sensitive soils (base saturation ≤10%) indicating a recovery, but ANC decreased in soils with base saturation >10%. At 40-80 cm ANC remained unchanged in acid-sensitive soils (base saturation ≤20%, pHCaCl2 ≤4.5) and decreased in better-buffered soils (base saturation >20%, pHCaCl2 >4.5). In addition, the molar ratio of Bc to Altoteither did not change or decreased. The results suggest a long-time lag between emission abatement and changes in soil solution acidity and underline the importance of long-term monitoring in evaluating ecosystem response to decreases in deposition. This article is protected by copyright. All rights reserved.

EWI Biomedical sciences

  • B003-ecology - forest soils, soil solution, pH, aluminium, nitrate

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Free keywords

  • ICP Forests, Level II, monitoring
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