Assessment Pollution of Lotic Aquatic Ecosystems of Dambovnic Catchement

This article presents an extensive investigation of physical-chemical parameters of water samples in the Dambovnic catchment, during 2007-2010. Parameters used to assess pollution levels in the Dambovnic river are: pH, dissolved oxygen, total and inorganic species of nitrogen and phosphorus and heavy metals (Cd, total Cr, total Mn). A serious problem of pollution in the river is the level of ammonia, corresponding to the last chemical quality class, degraded, in Dambovnic and Suseni lake area. It is interesting to study the mean concentrations of nitrogen compounds and phosphorus main level control sections of Dambovnic river, no possible differentiation graded sediment (in terms of their nutrient content). The largest transfer rates of cadmium are made between sediment and macroinvertebrates, followed by those between water and vegetation. In addition, manganese is the most mobilized from water by aquatic vegetation, but important factors of transfer were obtained from sediment and vegetation.