The impact of oil pollution on freshwater molluscs

In modern society, one of the most important problems is water pollution related to spills of oil and oil products. It is important to devise new methods of assessing pollution of water bodies. The method of bioindication allows us to reveal the regularities of changes in communities of organisms exposed to anthropogenic impact, and allows to predict the state of the ecosystem under changing external factors. The migration of substances a huge role for living organisms, accumulate in itself the trace elements, involving them in the trophic cycle. Shellfish are highly sensitive to oil pollution and are a major factor in enhancing the self-purification of aquatic ecosystems. The paper presents the results of experimental researches on influence of oil pollution on the development of shellfish species Planorbarius corneus in experimental conditions. The study describes the behavior changes identified critical concentration of oil resulting in changes in the ontogeny of molluscs. It is established that the survival of shellfish in contaminated water with oil changes depending on the concentration of the depositing, as a protective stress-response can be considered tight closing of the valves of shells. The age resistance of mollusks to pollution and adaptation to adverse conditions. The obtained results allow to recommend the use of molluscs as indicators of ecological status of water bodies.