Abstract
Hydrochemical and hydrobiological characteristics have been studied at 13 sites in the Okhta River within the precincts of St. Petersburg in 2010. The Water Pollution Index (WPI), calculated according to hydrochemical parameters, characterizes the river water quality as “very polluted” to “extremely polluted.” According to the Pantle–Buck–Sládeček Saprobity Index, obtained on the basis of macrozoobenthos characteristics, polysaprobic and α-mesosaprobic zones can be distinguished in the watercourse. The species richness of river macrophytes is low (18 species). The Macrophyte Water Quality Index makes it possible to assess water quality in the range from “polluted” to “very polluted” water. Macrophyte trophic indexes MTR, IBMR and TIM indicate a high trophy level in the watercourse sites. Based on the analysis of hydrochemical materials and the data on macrozoobenthos and macrophytes, the general tendency is similar: deterioration of water quality downstream. Macrophyte characteristics reflect changes in hydrochemical parameters downstream the river course. А strong correlation (r =–0.76) is found between the Macrophyte Water Quality Index and WPI. The possibility of using the data on macrophytes in small rivers for assessing water quality is demonstrated.
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Original Russian Text © N.V. Zueva, A.A. Bobrov, 2018, published in Biologiya Vnutrennykh Vod, 2018, No. 1, pp. 45–54.
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Zueva, N.V., Bobrov, A.A. Use of Macrophytes in Assessing the Ecological Status of Small River (by the Example of the Okhta River, St. Petersburg). Inland Water Biol 11, 34–41 (2018). https://doi.org/10.1134/S1995082917040137
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DOI: https://doi.org/10.1134/S1995082917040137