Biological Processes. Effects of Hydrobionts on Surface Water Quality

Role of biological processes in forming of surface water chemical composition in particular influence of hydrobionts on pH value of water environment, concentration of dissolved oxygen and redox potential, nutrients concentrations and dynamics is discussed. Major attention is paid to the role of hydrobionts in forming of nutrients composition in surface water objects. It is shown that water plants are one of the most important sources of hydrocarbons, protein compounds, aminoacids and compounds of phenol origin as well as different classes and groups of organic substances inflow into the water. Results of studies of hydrobionts impact on metals migration in surface water, transformation of their co-existing forms and characteristics of their distribution among biotic and abiotic components of water ecosystems are considered.