Accumulation of Heavy Metals by Plants of South Dagestan under the Conditions of Natural Geochemical Anomaly
I.V. DROZDOVA, N. V. ALEXEEVA-POPOVA, I. B. KALIMOVA
V. L. Komarov Botanical Institute, RAS, 196376, Saint-Petersburg, prof. Popova str., 2
Keywords: heavy metals, macroelements, natural geochemical anomaly, accumulation of heavy metals by plants, species of the family Brassicaceae
Abstract
The comparative study of the concentrations of chemical elements (Cu, Zn, Fe, Mn, Ni, Co, Cr, Cd, Pb, Ca, Mg, K) in plants and soils of South Dagestan was conducted in two districts distinguished by different level of heavy metals in rock formations. It was established that plants and soils in the area of natural geochemical anomaly (southern schistic region of Inner Dagestan mountain province) were characterized by higher content of the most part of the studied elements, except Ca and Cr, as compared to those in the reference area (northern limestone region of Inner Dagestan mountain province). High content of Cu, Zn, Fe, Mn, Ni, Co in plants and soils - the most important components of any ecosystem - allowed us to consider the south schistic region of Dagestan as a biogeochemical province with high concentration of the above mentioned heavy metals.
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