engleski

Environmental history and vegetation dynamics in the area of Central Croatia

In the sediment of the Blatuša peatland (central Croatia) qualitative and quantitative analyses of pollen and non-pollen palynomorphs, together with charcoal particles were performed. Based on the accumulated palynological taxa, the following zones were identified: Pinus - Fagus - (Ulmus) (Zone 1, depth 210 - 175 cm), Fagus - Alnus (Zone 2, depth 175 - 85 cm), Poaceae - Fagus - (Quercus) (Zone 3a, depth 85 - 45 cm) and Poaceae - Carpinus (Quercus - Fagus) (Zone 3b, depth 45 - 5 cm). According to the results of 14C AMS dating, deepest section of the core belongs to the late Subboreal period. The composition of the local palynological taxa and the ecologically indicative non-pollen palynomorphs indicates the dynamics of the hydrological regime as well as the trophic conditions on the habitat, with occasional domination of species from the family Cyperaceae, ferns Polypodiales or peat moss - Sphagnum. Based on accumulated non-pollen palynomorphs four zones were identified: HdV-179 - Spirogyra (EINPP1, depth 210 - 165 cm), Glomus - Spirogyra (EINPP2, depth 165 - 100 cm), Byssothecium circinans (EINPP3, depth 100 - 25 cm) and Assulina (EINPP4, depth 25-5cm). During the Zone 1 and 3b, the researched area was a mosaic of wetland vegetation and wet meadows, with partially developed peatland vegetation. Zone 2 is characterized by the relative local domination of the ferns, and Zone 3a by the relative dominance of the peat moss. The shares of arboreal pollen, anthropogenic indicators, charcoal particles and palynological richness point to the different intensity of anthropogenic pressure, which is mostly pronounced in the period from the developed Middle Ages to the present. Charcoal particles are evidence of regional and local fires as essential factors in succession processes. The quantity and quality of the analysed palynomorphs enable us to apply the results of the reconstruction of Holocene postglacial vegetation changes for the same period for a narrower area of this site located at the southern border of the southern part of Central Europe.

charcoal ; fire ; non-pollen palynomorphs ; pollen ; succession ; southern part of Central Europe

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