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This study assesses surface water quality along the Sf. Gheorghe Branch of the Danube Delta (km 85-km 15) and adjacent control sectors, in order to assess the influence of both natural processes and anthropogenic pressures on aquatic environmental conditions. In situ measurements were performed at 97 stations during the June and September 2025 campaigns using a YSI EXO2 multiparameter probe. The monitored indicators were temperature, pH, dissolved oxygen, conductivity, total dissolved solids, salinity, turbidity, ...

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...