Rubrics: ECOLOGY
Abstract and keywords
Abstract (English):
Mercury and lead are not essential elements and have a high degree of toxicity to all groups of living organisms, including hydrobionts. In turn, the accumulation of dangerous chemical elements in the primary trophic units of marine ecosystems is also reflected in the high level of accumulation and toxication of fish-valuable objects of fishing. As part of the study of the ecological state of the biota of the Volga-Caspian basin, there is a need to study the concentrations of heavy metals such as mercury and lead. The aim of the work is to study the content of mercury and lead in some invertebrate species of the Caspian Sea. The main source of mercury and lead in the body of the studied species is the water of the north-western part of the Caspian Sea. Among the studied taxonomic groups of organisms, mercury accumulators were all species of mollusks, as well as Balanus improvises and Rhithropanopeus harrisii. The lead concentrating organisms were Cerastoderma lamarcki and Mytilaster lineatus, Rhithropanopeus harrisii, and Balanus improvises.

heavy metals, accumulation, hydrobionts, invertebrates of the Caspian Sea

1. Gordeev V.V. River flow into the ocean and the features of its geochemistry. - Moscow: Nauka, 1983. - 160 p.

2. Zubkova V.M. Content and migration of heavy metals in the components of the ecosystem of the Volgograd reservoir / V.M. Zubkova, V.P. Bolotov, N.Yu. Belozubova //Agricultural science. - 2015. - No. 1. - pp. 14-16.

3. Kiryanov S.V. Influence of the Volga runoff on the state of pollution of the Northern Caspian Sea / S.V. Kiryanov, N.A. Afanasyeva // Meteorology and hydrology. - 1992. - No. 6. - pp. 114-117.

4. Lisitsyn A.P. Marginal filter of oceans // Oceanology. - 1994. - Vol. 34. - No. 5. - C. 735-747. [

5. Romankevich E.A. Geochemical condition of the seas of Russia and human health/ E.A. Romankevich, N.And. Aibulatov // Bulletin of the Department of earth Sciences RAS. – 2004. – No. 1. – P. 1-16.

6. Ostrovskaya E.V. Pollutants in the waters of the Volga-Caspian basin. / E.V. Ostrovskaya, V.F. Brekhovskikh, V.Z. Volkova – Astrakhan: Sorokin, Roman Vasilyevich, 2017. – P. 236-251.

7. Ostrovskaya E.V. Heavy metals in the Volga Delta-Northern Caspian system / E.V. Ostrovskaya, V.F. Brekhovskikh, Z.V. Volkov and others // South of Russia: ecology, development. - 2008. - No. 4. - pp. 133-139.

8. Chaplygin V.A. The content of some trace elements in the hydrobionts of the Caspian Sea / V.A. Chaplygin, A.S. Tanasova, T.S. Yershova, V.F. Zaitsev // South of Russia: ecology, development. – 2017. – 12(3). – Pp. 138-145. 10.18470/1992-1098-2017-3-138-145.

9. Chaplygin V.A. Transformation of metals in the system: soil food chains of sturgeon of the Caspian Sea / V.A. Chaplygin, T.S. Yershova, V.F. Zaitsev // South of Russia: ecology, development. – 2019. – 14(3). – Pp. 138-143.