DIGITALNA ARHIVA ŠUMARSKOG LISTA
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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 |