State, structure and regeneration processes of the selection forest after the windstorm in High Tatra National Park.
Titel:
State, structure and regeneration processes of the selection forest after the windstorm in High Tatra National Park.
Auteur:
Milan Saniga Jaroslav Vencurik Stanislav Kucbel Peter Jaloviar
Verschenen in:
Casopis Beskydy
Paginering:
Jaargang 2 (2009) nr. 1 pagina's 63-70
Jaar:
2009
Inhoud:
The wind gust velocity of the windstorm that has affected High Tatra in 2004 reached almost 200 km.h−1. This wind has uprooted more than 12 000 ha of the forest. In NP High Tatra the Department of Silviculture at the Forestry Faculty of TU Zvolen had established and observed a set of the permanent research plots (PRP), that were formed by the application of the selection cut during the long term period. The evaluation of the selection forest structure in the protection area Štrbské pleso is the object of this paper.In 1977 the permanent research plot of 0.5 ha with the transect of 10 × 70 m was established in the investigated stand. The measurements were conducted in years 1977, 1998 and 2008. All dendrometric characteristics of each tree i.e. tree height, crown base height, dbh and tree crown radius by using 4 vectors along with the position of each tree were measured on the transect. On the rest of the research plot only dbh of the trees was recorded. Besides this the regeneration processes on the transect were quantified and the individuals were classified into particular categories. The changes of the selection forest structure after the windstorm, the crown ratio of the trees of the selection forest as the stability indicator (Tab. 4) and regeneration processes are analyzed in this paper. The trees uprooted due to the windstorm were distributed almost evenly over all diameter classes up to 54 cm. The results of the research have confirmed, that the high crown ratio over 66% does not affect the maintenance of the tree or his uprooting, respectively, during such a wind velocity as was recorded in the High Tatra. It can be said, that the single tree selection forest has showed relatively high stability during the windstorm. This fact can be demonstrated also by the stand remnant, which can be considered sufficient for fulfilling the protection function of this stand for the future. The spruce regeneration processes are good after the windstorm and create a precondition for the next generation. No doubt, that this stand is able to fulfil the prescribed functions and at the moment no significant intervention of the forest manager is needed.