Application of the magic model to the Norway spruce stand at Solling, Germany

Abstract magic (Model of Acidification of Groundwaters In Catchments) is a long-term process-oriented model for soil and water acidification. The model consists of a set of chemical equilibria between soil and soil solution and an accounting of annual fluxes and pools of major anions and cations in the ecosystem. magic was applied to the dataset from the 105-year-old Norway spruce stand at Solling, central Germany. The primary aim was to evaluate the relative roles of forest management and acid deposition on soil acidification as expressed by the pool of exchangeable base cations (base saturation). Future scenarios of management and deposition reduction were investigated, and the model indicated that with a 75% reduction in deposition, soils would recover with respect to present day values if the forest is left, or removed and converted to grassland, but would continue to acidify if the forest was removed and replanted.

[1]  H. G. Miller.  Dynamics of nutrient cycling in plantation ecosystems , 1984 .

[2]  B. Cosby,et al.  Changes in acidification of lochs in Galloway, southwestern Scotland, 1979–1988: The MAGIC model used to evaluate the role of afforestation, calculate critical loads, and predict fish status , 1994 .

[3]  J. Miller,et al.  Effect of Nitrogen Supply on Net Primary Production in Corsican Pine , 1976 .

[4]  W. Bouten.  Soil water dynamics of the Solling spruce stand, calculated with the forhyd simulation package , 1995 .

[5]  H. G. Miller.  Forest Fertilization: Some Guiding Concepts , 1981 .

[6]  R. Wright,et al.  Regional Acidification Models , 1989, Springer Berlin Heidelberg.

[7]  Alan Jenkins,et al.  Modelling Surface Water Acidification Using One and Two Soil Layers and Simple Flow Routing , 1989 .

[8]  Aaldrik Tiktak,et al.  Review of sixteen forest-soil-atmosphere models , 1995 .

[9]  G. Hornberger,et al.  Modeling the Effects of Acid Deposition: Assessment of a Lumped Parameter Model of Soil Water and Streamwater Chemistry , 1985 .

[10]  R. Skeffington,et al.  Nutrition of Plantation Forests. , 1984 .

[11]  G. Hornberger,et al.  Modeling the Effects of Acid Deposition: Control of Long‐Term Sulfate Dynamics by Soil Sulfate Adsorption , 1986 .

[12]  B. Cosby,et al.  Modelling stream acidification in afforested catchments: Long-term reconstructions at two sites in central Scotland , 1990 .

[13]  A. Tiktak,et al.  The Solling Norway Spruce site , 1995 .

[14]  J. Mulder,et al.  Modelling Al-solubility controls in an acid forest soil, Solling, Germany. , 1995 .

[15]  Harald Sverdrup,et al.  Application of the safe model to the Solling spruce site , 1995 .

[16]  George M. Hornberger,et al.  Modeling the Effects of Acid Deposition: Estimation of Long‐Term Water Quality Responses in a Small Forested Catchment , 1985 .