Long-term patterns in soil acidification due to pollution in forests of the Eastern Sudetes Mountains |
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Authors: | Radim Hédl Petr Pet?íkKarel Boublík |
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Institution: | a Department of Vegetation Ecology, Institute of Botany, Academy of Sciences of the Czech Republic, Lidická 25/27, CZ-602 00 Brno, Czech Republic b Department of Geobotany, Institute of Botany, Academy of Sciences of the Czech Republic, Zámek 1, CZ-252 43 Pr?honice, Czech Republic c Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ-165 21 Praha 6 - Suchdol, Czech Republic |
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Abstract: | Soil acidification was assessed in the Eastern Sudetes Mountains (Czech Republic) between 1941 and 2003, i.e. before and after the period of major industrial pollution (1950s-1990s). The twenty sites included in our study were distributed along a gradient of altitude ranging 1000 m. Values of pH have decreased in 80-90% of the pairs of samples after the six decades, on average by 0.7 for pH-H2O and 0.6 for pH-KCl. Organic matter increased in the topsoil, probably reflecting a change in decomposition conditions. The most important finding is that the acidification varies along the joint gradient of altitude/tree layer composition, and displays a changing pattern in three soil horizons (A, B and C). Contrary to expectations, most acidified were soils in beech forests at lower elevations. |
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Keywords: | Long-term change Revisitation study Soil acidity Tree composition Altitudinal gradient |
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