N. GEORGIEVA, K. PACHEDJIEVA and M. LYUBENOVA
Sofia University “St. Kliment Ohridski”, Faculty of Biology, Department of Ecology and Environmental Protection, BG – 1164 Sofia, Bulgaria
Georgieva, N., K. Pachedjieva and M. Lyubenova, 2013. SCI “Zapadna Stara Planina and Predbalkan” – floristic studies on xerothermic oak forests. Bulg. J. Agric. Sci., Supplement 2, 19: 218–221
The main aim in the present study is to identify the floristic diversity of xerothermic oak forests with predomination of Quercus cerris L.and Quercus frainetto Ten.in SCI “Zapadna Stara planina i Predbalkan”. The inventory of the floristic complex resulted in more than 100 species of higher plants that belong to almost 80 genera and 40 families represented in the Bulgarian vascular flora. The biological spectrum made based on Raunkiaer’s life forms shows the predominance of hemicryptophytes and takes an intermediate position between the spectrums of the forests in the temperately warm and temperately cold zone. The phytogeographical spectrum shows the predominance of European-Asian and subMediterranean floral elements which are represented equally (about 20% each). They are followed be the European, European-Mediterranean and sub-Boreal floral elements (about 11% each). The anthropophytes are also discussed. The results of the present study will be a fundament of a further complex investigations of the xerothermic oak forests in the protected site and will be useful for the defining of succession processes in the discussed forests.