On the Ratio of Biological and Aquatic Migration of Chemical Elements in the Continental Biosphere Sector

Abstract

The intensity of biological and aquatic migration of chemical elements within continental sector of the biosphere was quantified. Ratio of the amount of continental runoff of element i to the mass of this element, which during the year is involved on land in the biotic cycle, ($\beta_{i}$) characterizes relation of aquatic and biological migration and is as a quantitative measure of the biotic cycle openness degree. The $\beta_{i}$ values were determined for various chemical elements. It was established that high degree of the biotic cycle closeness is appropriate for elements that both perform and do not perform certain physiological functions in organisms. It was shown that a relatively low selectivity of biological consumption by plants is observed for most chemical elements. Clearly expressed selective concentration is inherent to P, Mn, Rb, Co, K, Cu, Ba, Zn. Discrimination is peculiar to F, Cl, Br, I, Li, Na, U, Se, Sb.