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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ulrich, Bernhard |
| Copyright Year | 1999 |
| Abstract | In Waldökosystemen besteht eine nach Raum- und Zeitskala differenzierte Hierarchie der Prozesse, auf die sich die Hierarchitätstheorie anwenden läßt. Diese liefert Aussagen über Selbstorganisation, Stabilitätsbedingungen und des Verhalten gegenüber Störungen. Die Art des Prozeßablaufs, ob ungestört oder gestört, ist anhand von Mustern erkennbar; dies wird am Beispiel von Wachstumsmustern im Wurzel-, Stamm- und Kronenbereich demonstriert. Die Kronenverlichtung zeigt, daß Störungen das Niveau des Gesamtbaums erreicht haben; ihre Erhebung sollte als Indikator für eine Destabilisierung langfristig fortgeführt werden. Ein Muster für die Speicher- und Pufferfunktion des Bodens hinsichtlich Nährstoffe und Säurebelastung ist die Basensättigung. Sie ist auf mehr als der Hälfte der Waldböden Deutschlands bis in große Tiefe zu nieder; hieraus wie auch aus den überhöhten Stickstoffeinträgen ergeben sich Risiken für die Entwicklung der Bestände und ihre Verjüngung. Maßnahmen zur Stabilisierung der Waldökosysteme werden angeführt.Forest ecosystems are characterized by a hierarchy of their processes, differentiated according to a space and time scale. Thus, the hierarchy theory can be applied, which allows conclusions about self-organization, stability conditions, and the reaction to disturbances. Process patterns allow to judge whether a process is undisturbed or disturbed. This is demonstrated by growth patterns in the root, stem and canopy domain. Defoliation indicates that disturbances have reached the level of the whole tree. The monitoring of defoliation should be continued as an indicator for destabilization. Base saturation is a pattern for the storage and buffer function of the soil in respect to nutrients and acid load. On more than half of the forest soils in Germany base saturation is too low even at greater soil depth. This, together with elevated nitrogen deposition, is taken as criterion for risks in respect to stand development and regeneration. Measures for the stabilization of forest ecosystems are mentioned. |
| Starting Page | 118 |
| Ending Page | 126 |
| Page Count | 9 |
| File Format | |
| ISSN | 00158003 |
| Journal | Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch |
| Volume Number | 118 |
| Issue Number | 1-6 |
| e-ISSN | 14390337 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 1999-01-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | ecosystem processes spatial and temporal scale process pattern stability and destabilization Forestry Plant Sciences Plant Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Forestry |
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