HORIZONTAL AND VERTICAL SPATIAL DISTRIBUTION AND LOSS OF GRASSLAND IN BOSNIA AND HERZEGOVINA

Two databases related to grassland in Bosnia and Herzegovina (B&H) have been used in this research—the Copernicus Grassland (GRA) and CORINE Land Cover (CLC). The data have been processed by using GIS tools, and the spatial distribution of grass vegetation in relation to three biogeographical and four elevation zones has been determined. By using the Copernicus Water and Wetness (WaW) database, an insight into the coverage of grass vegetation in wetlands has been obtained. In addition, the analysis of changes in databases determined the total amount and location of the largest grassland losses. Based on GRA database, B&H is one of the richest countries, with 22.4% of its territory covered by grassland. According to the CLC database, pastures occupy 6.3% and natural grasslands 5.6% of the territory of B&H. However, grassland is exposed to various anthropogenic and natural processes that affect its distribution, quality, functions, etc. The CLC database has been processed by extracting the grasslands (pastures and natural grasslands) and calculating their spatial coverage and changes which happened during the three six-year periods from 2000 to 2018. The trend of decreasing pasture areas and increasing natural grasslands has been noticed. The pastures are most endangered by the processes of conversion to other types of agricultural land, while natural grassland increased spatial coverage during the period 2012–2018 mostly due to the revitalization and grazing of burned areas in the region of Herzegovina. Grasslands have been particularly targeted for afforestation and cropland conversion at present

Estimation of antioxidative potential of thyme (Thymus alpestris L.)

Family Lamiaceae (labia) includes a large number of cosmopolitan speciesincluding Thymus alpestris (Thyme) characterized by the presence of essential oilsand phenolic compounds. It represents a perennial semi-shrubby plant. Theantioxidant potential of thyme is due to the presence of polyphenolic acids andflavonoids. The topic of this paper is the extraction of thyme (Thymus alpestris)with 40% ethanol and 50% ethanol, using Soxhlet method (circulatoryextraction), after which, the content of phenolics and flavonoids was determinedin order to confirm the antioxidant potential of this plant species. The resultsshow that 40% ethanol extract has the highest content of phenolics andflavonoids and the highest antioxidant potential, resultingly

GROUNDWATER VULNERABILITY IN KARST OF JAHORINA

Analysis has studied northern part of Jahorina, Ravna Mountain, whose karst plateau presents wateraggregation surface for Paljanska Miljacka and Bistrica flows, which are used as water supply forSarajevo and Pale. This paper presented hydrogeological and hydrological characteristics of the areaand applied analyzes of other physical-geographic characteristics which are an essential indicator of thequality of groundwater. Applying various methods, we have obtained maps that shows different waysof groundwater pollution in karst. We analyzed spatial relationships and connections with individualsocio-geographical components. Thought correlation methods we obtained results which providedconclusions for possible measures against pollution of groundwater in karst and karst in general