Experimental Estimation of the Possibility to use Submersed Macrophytes for Biotesting of Bottom Sediments of the Yenisei River
T. A. ZOTINA, E. A. TROFIMOVA, A. Ya. BOLSUNOVSKY, O. V. ANISHENKO
Institute of Biophysics SB RAS, 660036, Krasnoyarsk, Akademgorodok
Keywords: bottom sediments, Elodea canadensis, Myriophyllum spicatum, bottom sediments, toxicity, artificial radionuclides, heavy metals, nutrients
Abstract
Laboratory testing of bottom sediments (BS) of the Yenisei River with different concentrations of artificial radionuclides, heavy metals and nutrients (N, P), carried out using aquatic plants Elodea сanаdensis and Myriophyllum spicatum , revealed higher sensitivity of root growth endpoints to BS quality as compared to shoot growth endpoints. We obtained the following data: shoot length (9 %) < root length (11 %) < root number (15 %) for M. spicatum and shoot length (22 %) < root length (42 %) < root number (44 %) for E. canadensis . Endpoints of E. canаdensis differed significantly among most of the samples of BS, unlike M. spicatum . Reverse correlation of shoot length growth and concentration of artificial radionuclides, 137Cs and total (natural and artificial) activity concentration in the samples of BS was revealed for E. canаdensis ( r 2= -0.90–0.95, p < 0.05). As endpoints of E. canаdensis were more sensitive to the quality of BS than endpoints of M. spicatum , the former can be considered as a species more perspective for biotesting of BS.
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