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The tectonics of Sredna Gora Mts includes three structural complexes: Precambrian, Caledonian-Herzinian and Alpine, in which several structural levels and sub-levels are distinguished. They form the main structures of the Sredna Gora Mts: Ihtimanski anticlinorium, Srednogorie horst-anticlinorium, Bailovo-Panagyuriski synclinorium (Panagyurishte Str...
Citations
In times of widespread environmental pollution with heavy metals of anthropogenic origin and the increasing dynamics of this process, it is justified to collect as much data as possible on the concentration of metals in terrestial mammals from unpolluted areas. The purpose of this research was to present the concentration of essential (chromium, copper, iron, manganese, molybdenum, and zinc), probably essential (nickel, vanadium) and non-esential element (cadmium, lead, silver, strontium, and tin) in the liver, kidneys, muscles and brain of red fox (Vulpes vulpes) inhabiting north-western Poland. We revealed that the concentration of all metals, apart from Ni, was different between studied tissues. Sn and Mo have the highest affinity to the liver, whereas Ag, Sr, Cr had higher concentrations in the brain than in other organs. Various positive relationship between the concentrations of metals were observed in the tissues. Moreover, we noted negative correlations between Ag and Sn in the kidneys and brain, and between Cu and Ag in the liver. In our study the red fox was used as biomonitor for the assessment of exposure of carnivores to metals, in the generally unpolluted areas of Central Europe. Data presented in the report may be used as comparative values in similar ecotoxicological studies.
The present paper is focused on the soil characteristics of the Sarnena Sredna
Gora Mts. In the lower altitude zone, with warmer and drier climate, deciduous
(mostly oak) vegetation and heterogeneous rock composition, mainly Cinnamon
forest soils are developed. The taller, relatively wetter and colder altitude zone, with
beech forests and non-carbonate rocks, is dominated by Brown forest soils. In the
highest parts of Sarnena Sredna Gora Mts, with well-developed grasslands, there are
Mountain meadow soils. In the lower parts of the relief, made up of upper
Cretaceous volcanics and pyroclastites, there is a localized development of
Smolnitsa, and in the valleys of the rivers and depressions with low alluvial-proluvial
deposits - Alluvial and Alluvial-meadow soils
