The Influence of Abiotic Factors on the Reconstruction of the Biocoenosis areas Polluted with Organic and Inorganic Compounds from the Lower Sector of the Jiu River

Abstract

It is well-known that an environmental condition allows us to understand the distribution of microorganisms in nature and establish methods to fight against and eliminate undesirable microorganisms. Our studies illustrate the toxic effects of metals on living organisms and above all effective technologies for reducing concentrations of metals in the waste water by classical and modern systems. The concentrations of Pb2+, Cd2+, Cu2+, Zn2+, Mn2+ and Fe2+ from the water of the lakes in the lower sector of the Jiu were found below the limit of detection admissible by international standards. Pb2+ and Cd2+ are not considered to be essential for life, but these metals are concentrated in the populations of Viviparus acerosus and Radix balthica from the aquatic environment. The process of accumulation of metallic ions in populations of microorganisms and gastropods strongly depends on their concentration in water and sediments as a living environment. Patterns of accumulation and HM transfer in biocoenosis are used for the characterization of the risks of environmental pollution in the aquatic ecosystems from Romania. The presented data are the result of the convention between the Institute of Biology Bucharest and the Oltenia Museum of Craiova.