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Regeneration of burned stands of pubescent oak (Quercus pubescens Willd.) and holm oak (Quercus ilex L.) in the Zadar area

ŽELJKO ŠPANJOL ; Department of Ecology and Silviculture, Faculty of Forestry, University of Zagreb, Svetošimunska 25, HR-10000 Zagreb, Croatia
DAMIR BARČIĆ ; Department of Ecology and Silviculture, Faculty of Forestry, University of Zagreb, Svetošimunska 25, HR-10000 Zagreb, Croatia
ROMAN ROSAVEC ; Department of Ecology and Silviculture, Faculty of Forestry, University of Zagreb, Svetošimunska 25, HR-10000 Zagreb, Croatia
NERA MARKOVIĆ ; Department of Ecology and Silviculture, Faculty of Forestry, University of Zagreb, Svetošimunska 25, HR-10000 Zagreb, Croatia
MISLAV MARŠIĆ ; Forest office Zadar, »Hrvatske šume« d.o.o., V. Maštrovića 14, HR-23000 Zadar, Croatia
IVO GALIĆ ; 3Department of Mining Engineering and Geotechnics, Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia

Sažetak

Background and Purpose: Pubescent oak (Quercus pubescensWilld.)
and holm oak (Quercus ilex L.) are climatozonal species in the area of
Zadar, where the communities formed by these two species have an ecological- protective role. The aim of this research is to address the problem of the disturbed stability of these stands and the possibility of their post-fire regeneration.

Materials and Methods: Research was undertaken in burned and unburned areas of the Zadar Forest Office. This included pubescent oak coppices, scrub, thickets, maquis and garrigue. The relevés were made according to the plant sociology method (Braun-Blanquet 1964, Dierschke 1994). Pedological research involved taking composite samples of the humus-accumulative horizon. Chemical soil analyses were performed according to the standard methods.

Results: The number of pubescent oak individuals was about 2.5 times higher in burned areas compared to unburned ones. This was in contrast to holm oak, which showed poorer occurrence in burned areas in relation to unburned ones. The average number of all trees and shrubs in degraded forms of pubescent oak was 11.567 per hectare, whereas in degraded forms of holm oak forest this number was more than twice as high and amounted to 2.550 individuals per hectare.

Conclusions: Forest fires are an important cause of soil degradation.
Burned areas are subject to erosion, the disappearance of or a decrease in soil biological activity, and extreme ecological effects. In order to mitigate the problem, certain prescribed post-fire recovery methods should be urgently applied.

Ključne riječi

succession; forest fire; climatozonal vegetation; karst

Hrčak ID:

47945

URI

https://hrcak.srce.hr/47945

Datum izdavanja:

31.12.2009.

Posjeta: 1.796 *