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Heavy mineral concentrations formed in fluvial deposits present the signature of the mineral provenance and of the hydraulic sorting during transport and accumulation. The sedimentary discharge of the Danube River has been preferentially deposited due to the mineral physico-chemical properties, such as size, morphology and density, as well as local hydrodynamic factors. Besides these natural aspects, the recent modifications of the Danube and its deltaic branches are associated with a significant remodelling of th...

Asellus aquaticus Linnaeus, 1758 is the widespread and common Palearctic freshwater isopod, feeding on detritus. This crustacean, probably, has its ancient evolutionary origins around Siberia and has spread from there to Western Europe and North America. Commonly associated with a temperate climate, it has been recorded as far south as the Mediterranean, and as far north as Scandinavia. The species is primarily associated with the b-mesosaprobic waters of the palearctic realm i.e., high concentrations of dissolved...