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Report - ICP Forests

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68 3. Intensive Monitoring<br />

Hall, J., Reynolds, B., Aherne, J. and Hornung, M. (2010): The importance of selecting<br />

appropriate criteria for calculating acidity critical loads for terrestrial ecosystems using<br />

the simple mass balance equation. Water, Air, and Soil Pollution: Focus 1, 29 - 41.<br />

Koch, A.S. and Matzner, E. (1993): Heterogeneity of soil and soil solution chemistry under<br />

Norway spruce (Picea abies Karst.) and European beech (Fagus silvatica L.) as<br />

influenced by distance from the stem basis. Plant and Soil 151, 227 - 237.<br />

Løkke, H., Bak, J., Falkengren-Grerup, U., Finlay, R.D., Ilvesniemi, H., Nygaard, P.H. and<br />

Starr, M. (1996): Critical loads of acidic deposition for forest soils: Is the current<br />

approach adequate? Ambio 25, 510 - 516.<br />

Lorenz, M., Nagel, H.-D., Granke, O. and Kraft, P. (2008): Critical loads and their exceedances<br />

at intensive forest monitoring sites in Europe. Environmental Pollution 155, 426 - 435.<br />

Spranger, T., Smith, R., Fowler, D., Mills, G., Posch, M., Schütze, G., Hettelingh, J.-P. and<br />

Slootweg, J. (2004): Manual on methodologies and criteria for medelling and mapping<br />

critical loads and levels and air pollution effects, risks and trends.<br />

Sverdrup, H. and Warfvinge, P. (1993): Effect of soil acidification on growth of trees and plants<br />

as expressed by the (Ca+Mg+K)/Al ratio.

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