Somogyi Múzeumok Közleményei 17/B. - Természettudományi tanulmányok (2006)

Kevey Balázs: A somogyi Dráva-ártér gyertyános-tölgyesei - Oak-hornbeam forests of the floodplains of the Drava river in Somogy, SW. Hungary

102 KEVEY BALÁZS WEBER, H. E. - MORAVEC, J. - THEURILLAT, J. P. 2000: International Code of Phytosociological Nomenclature. 3rd edition. -Journal of Vegetation Science 11: 739-768. ZÓLYOMI В. 1936: Tízezer év története virágporszemekben. -Term. tud. Közi. 68: 504-516. ZÓLYOMI B. 1952: Magyarország növénytakarójának fejlődéstörténete az utolsó jégkorszaktól. - MTA Biol. Oszt. Közlem. 1: 491-530. ZÓLYOMI B. 1981: Magyarország természetes növénytakarója. -In: Növényföldrajz, társulástan és ökológia (szerk.: HORTOBÁGYI T. - SIMON T.). - Tankönyvkiadó, Budapest, mellékelt vegetációtérkép. Oak-hornbeam forests of the floodplains of the Drava river in Somogy, SW. Hungary BALÁZS KEVEY In this paper, the phytosociological characteristics of the oak-hornbeam forests occurring along the Somogy county, SW Hungary section of the Dráva river are analyzed using 50 vegetation records. According to the results, this association {Circaeo-Carpinetum) as interpreted by BORHIDI (2003) should be divided into four separate associations based on their habitat characteristics. The species compositions of the oak-hornbeam forests growing on gravelly fluvial soils, on sand, on loamy soils developed on loess, and on mesophilic floodplains are different. Since the most widespread type of the oak-hornbeam forests is the one growing on the floodplains, and thus resembling the hardwood gallery forests, I propose the original name of Circaeo-Carpinetum BORHIDI 2003 be applied only to this association. Due to the occurrence of some submediterranean species, the stands of Circaeo-Carpinetum-occurring on the Somogy county section of the Drava river floodplains are somewhat similar to the oak-hornbeam forests growing on sand (Fraxino pannonicae-Carpinetum) in the neighbouring Inner Somogy region. However, these plants play a subordinate role in the association. As a consequence, these stands are closest phytosociologically to the oak-hornbeam forests of the Sava plains and the Drava plain in Baranya county, and extend as far as Gyékényes along the river's floodplain.