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| Content Provider | Springer Nature Link |
|---|---|
| Author | Mende, Werner Albrecht, Karl Friedrich |
| Copyright Year | 2001 |
| Abstract | Das Wachstum der mittleren Bestandeshöhe von Fichten (Picea abies) wird mit Hilfe des Evolon-Modells für verschiedene Standortklassen beschrieben. Die Daten sind den Wachstumstafeln vonA. v. Guttenberg (1915) entnommen. Im Ergebnis einer Parameteroptimierung wird für die Anfangsphase des Wachstumsprozesses parabolisches Wachstum (κ=0,41) und für die sich anschließende Sättigungsphase hyperbolische Annäherung (λ=1,67) an den Sättigungswert erhalten. Die Werte für die beiden skaleninvarianten Evolon-Modellparameter κ und λ können folgendermaßen interpretiert werden: Zu Anfang ist der Wachstumsprozeß hauptsächlich von innen heraus entsprechend der artspezifischen Erbinformation programmiert. Dieser Teil des Wachstumsprozesses wird durch den Parameter κ beschrieben. In der späteren Sättigungsphase werden ökologische Grenzen wirksam. In dieser Phase vollzieht der Baum einen individuellen Anpassungsprozeß an seine den speziellen Standortbedingungen entsprechenden Wachstumsgrenzen. Dieser Sättigungsprozeß wird durch den Parameter λ beschrieben. Drei Parameter des Evolon-Modells erweisen sich als nahezu unabhängig von der Standortklasse. Nur für die beiden Baumhöhen repräsentierenden Parameter ergibt sich eine deutliche Abhängigkeit vom Standort. Die Beschreibung der Daten durch das Evolon-Modell ist deutlich besser als die Beschreibung mit dem häufig benutzten Richards-Modell. Gleichzeitig liefert das Evolon-Modell realitätsnähere Prognosen.The growth of the mean stand height of spruces (Picea abies) for different site classes is described using the Evolon model. The data are taken from growth tables established byA. v. Guttenberg (1915). As a result of a parameter optimisation we obtain parabolic growth (κ=0.41) for the initial growth phase and hyperbolic asymtotic approximation (λ=1.67) to the saturation value during the later saturation phase. The values for the scale-independent parameters κ and λ of the Evolon model can be interpreted as follows: The initial growth process is mainly determined by the genetic information of the given species. This growth phase is described by the parameter κ. In the later saturation phase, however, ecological limitations come into effect. During this phase the tree undergoes an adaptation process to its individual growth limit caused by the site conditions. This saturation process is described by the parameter λ. Three parameters of the Evolon-model do not show a clear dependence on the site conditions. Only two parameters, which represent tree heights, depend clearly on the site conditions. The description of the data by the Evolon-model is remarkably better than the description by the commonly used Richards model. Simultaneously the Evolon model provides more realistic growth predictions than the Richards-model does. |
| Starting Page | 53 |
| Ending Page | 67 |
| Page Count | 15 |
| File Format | |
| ISSN | 00158003 |
| Journal | Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch |
| Volume Number | 120 |
| Issue Number | 1-6 |
| e-ISSN | 14390337 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2001-01-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Growth modelling Evolon-model Richards-model forest stand height growth Norway spruce Forestry Plant Sciences Plant Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Forestry |
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