Autor(en): Watzl H.
In the Alps you can see often mixed forest stands consisting of Pinus mugo and other trees below the timer line. These forests show different periods of coexistence due to successional processes, site factors and site dynamics.
It was analyzed if there is permanent coexistence of P. mugo, a pioneer species, and Fagus sylvatica, a dominant broad leaf species in central Europe, and which factors allow for it. Data was collected in a forest stand, consisting of the main tree species P. mugo and F. sylvatica, in a watershed in the national park Gesäuse. Site factors, species composition, tree features and stand structure were analyzed on 21 10x10m plots. By means of tree cores conclusions about the age of the stand and its development as well as release events were drawn. Avalanche simulation, created with ArcGIS and ELBA, give information about the potential interference of plots by avalanche release and the resulting creation of diverse site factors.
The results show that repeated release events can set the system back and limit the distribution of F. sylvatica. Although regeneration of F. sylvatica can establish successfully in the area it has not occupied all niches yet due to seed limitation. Indications were found that a differentiation of niches accounts for coexistence as well.
Berichte und Veröffentlichung
Watzl H. (2011): Coexistence of Pinus mugo and Fagus sylvatica in the National Park Gesäuse. Diplomarbeit an der Univ. für Bodenkultur in Wien, 146 S