Ecological Status of Xerothermic Oak Ecosystems – Sci “Zapadna Stara Planina i Predbalkan”

Sofi a University “St. Kliment Ohridski”, Faculty of Biology, Department of Ecology and Environmental Protection, BG – 1164 Sofia, Bulgaria


GEORGIEVA, N. and M. LYUBENOVA, 2014. Ecological status of xerothermic oak ecosystems – SCI “Zapadna Stara planina i Predbalkan”. Bulg. J. Agric. Sci., Supplement 1: 105–109


The publication presents investigation on ecological status of xerothermic oak ecosystems in SCI “Zapadna Stara Planina i Predbalkan” (BG0001040). The reproductive capacity of tree layer and health status of forest communities are evaluated. The indicators, set out in forest monitoring, are assessed such as: defoliation and discoloration of the crown, damage coeffi cient of forest ecosystems, chemical analysis of soil, mulch and litter-fall (as a nutrient reserve for plant communities) and intensity of biological cycle. The investigated xerothermic oak ecosystems still are in a good ecological status according to the obtained data and calculated indices. Nevertheless a couple of negative trends are obtained: low average age of seedlings, low survival rate, turfi ng in herbaceous layer and increasing number of dried trees number.

Key words: ecological status, oak ecosystems, protected zone
Abbreviations: SCI – site of community importance, IAS – integral assessment scale, DBH – diameter of breast height, H – height


See the article as a PDF.