prilagođeno pretraživanje po punom tekstu

ŠUMARSKI LIST 11-12/2006 str. 18     <-- 18 -->        PDF

J. Vukelić, D. Baričević, Z. List, M. Šango: PRILOG FITOCENOLOŠKIM ISTRAŽIVANJIMA ŠUMA ... Šumarski list br. 11–12, CXXX (2006), 479-492
such as river islands and pebbly and sandy shoals have decreased by as much
as 92 % (Schneider-Jackoby 2006).

Another important factor in the analysis of the condition and changes in
the forests of the study area is the type of management, or more accurately,
the regeneration method applied on the stands of common alder. Stands over
80 years old are cut in a single treatment and the site is cleared and regenerated
with seedlings of common alder in the same year. Although such an approach
is highly efficient, cheap and good from a silvicultural standpoint, it does
not take sufficient account of the ecological, vegetational and other specific
features and differences. This results in the uniformity of the stands and sites
and a decrease or disappearance of some species – primarily hydrophytes
and hygrophytes. Moreover, the natural onset, participation and growth of other
species, such as the narrow-leaved ash and even pedunculate oak, are
slowed down. Changes caused by the construction of roads and the adjacent
canals, as well as a direct human impact, constitute another important factor.

Key words: Common alder, Carici elongatae-Alnetum glutinosae, Pruno-
Fraxinetum, Podravina, a change in the floral composition