Sigma-Soziologie von Weidfeldern im Schwarzwald: Methodik, Interpretation und Bedeutung für den Naturschutz
[Synsociological Relevées of Grazing Land Complexes in the Black Forest: Methods, Interpretation and Importance for Nature Preservation]
Synsociological Relevées of Grazing Land Complexes in the Black Forest: Methods, Interpretation and Importance for Nature Preservation. - A Sigma table of grazing land complexes indicates five types: 1. Molinia caerulea-Nardus stricta-community-Sigmetum in the upper northern Black Forest; 2. Sarothamno-Nardeto-Sigmetum, formation of the lower part of northern Black Forest; 3. Sarothamno-Nardeto-Sigmetum, typical formation (lower part in the midst of the Black Forest); 4. Festuco-Genisteto-Sigmetum, mainly in the southern Black Forest; 5. Leontodonto helvetici-Nardeto-Sigmetum, upper southern Black Forest. The methodical problems concerning the selection of relevée areas and table work have been discussed. Besides associations e. g. fragments and there above forms created by men were also included to show the typical patch pattern of a certain landscape. The significance for nature preservation and its scientific fundamentals is based upon the possibility to describe ecosystems by means of Sigma relevées and to deduce a criterion list for valuation from the Sigma table. It would be a future aim to describe all existing preserves by means of Sigma relevées, and to select new preserves, and to decide upon the urgency of its selection by applying synsociological means.