Ostracod-Diatomaceae paleoecologic and isotopic inference model for the fossil freshwater and brackish lakes
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The Central and South-Eastern European freshwater systems of the Neogene are characterized by outstanding endemism. The roots of that biodiversity are firmly planted on the geological origins of the Balcan Peninsula and Central Europe, being products of continental plate tectonics and the evolution of the large marine basins (Paratethys, Tethys), followed by a major Alpine phase in Miocene. The ostracods, small crustaceans with calcified carapace, and Diatomacea, algae with siliceous test, are the most often and abundant mikrofossils in the Paratethys limnic deposits, but their usage in paleolimnological research and for biostratigraphic purpose requires a taxonomic investigation and re-examination of the original material by new microscopical methods. As the isotopes composition of the diatom and ostracod tests is a function of the lake water isotopic composition, they are used as proxies for lake isotopic evolution and for quantification of the paleoecological data. Because measured data can be influenced by a vital effect, the project will compare the data of two fossil groups.