Helfen Ellenberg-Zeigerwerte bei der Abschätzung des Nitrataustragsrisikos in Wäldern?

Weihenstephan

2005

S. 36-43

3 Abb., 3 Tab., 36 Lit. Ang.

Artikel aus einer ZeitschriftUnselbständiges Werk

200129127

The data of the nitrate inventory in Bavaria allowed to examine whether nitrate leaching of forest soils can be predicted by Ellenberg indicator values. Significant correlation between nitrate concentrations in the top- and the subsoil stressed the indicator potential of the ground vegetation. Significant relationships with modelled ammonium deposition and other deposition indicators reveal the causes of eutrophication of forests in the perspective of the ground vegetation. These relationships point once more to the agriculture as the most important source of nitrogen deposition in forests. Despite, the demonstrated indicator potential the explanation of the analysed regionalisation model could not be improved much by the inclusion of indicator value for nitrogen. Moreover, the limited basis of appropriate geodata hinders the use of ground vegetation within spatial modelling. Nevertheless, the observation of ground vegetation within the biogeochemical monitoring of forests is an important complementary tool. Comprehensive analyses of such approaches should be intensified. This would help to improve the understanding of consequences and dynamics within the process of nitrogen saturation.