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A phytocoenological study of forests of Hungarian oak and Turkey oak (Quercetum frainetto-cerridis /Rudski 1949/ Trinajstić et al. 1996) on the Northwest border of arrival (Nature park Papuk, Croatia)

The paper presents phytocoenological research of forests of Hungarian and Turkey oak in the locality of Otmanov Vis within Papuk Nature Park. These specific and very interesting areas has not so far been included in research of a broader distribution range of the community of Hungarian and Turkey oak and represents a unique feature because of very rare soil type (eutric ranker on trachyandesite). Phytocoenological sampling based on the principles of the Zürich-Montpellier School was performed on five plots. Our own relevés were compared with those from a broader Kutjevo area, Bosnia and Herzegovina and northwestern Serbia. Statistical analysis was accomplished using Syn-tax 2000 software. According to the results, the studied stands belong to the association Quercetum frainetto-cerridis (Rudski 1949) Trinajstić et al. 1996, or more precisely to its subassociation ruscetosum Jovanović et Dunjić 1951. Syntaxonomically, they belong to the alliance Quercion frainetto, order Quercetalia pubescentis, and class Querco-Fagetea. In addition to the characteristic species of the association, the subassociation in the study area is well defined by the following differential species of the subassociation: Cornus mas, Helleborus odorus, Melica uniflora, Teucrium chamaedrys, Ruscus aculeatus, Physospermum cornubiense and Campanula persicifolia. In terms of synecology, it is characterized by its occurrence in the colline belt, at elevations from 260 to 400 m and inclinations from 5 - 40°. As Otmanov Vis is the only area in Croatia where this subassociation is occurs this work also presents the first description of this subassociation in Croatia. The site should be placed under special protection due to exceptional biological diversity and beauty of the landscape.

phytocoenological study, Quercetum frainetto-cerridis, Croatia, ruscetosum, first description

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