Оценка экологического состояния водных экотопов реки Калиновка по данным фитоиндикации и гидрохимического анализа (Викуловский район, Тюменская область)

Abstract

The article presents the results of the estimation of the ecological state of the water ecotopes of the Kalinovka (a watercourse of the third order related to the Ishim basin) obtained during the research on the river in 2016. According to the hydrobotanical study in the flora of the hydromacrophytes of the Kalinovka there are 23 species from 19 genera, 16 families, 2 divisions. Rooted perennials are the basis of the spectrum of the life forms of the flowering plants of the Kalinovka (67 % of biomorphs), free-floating – 16 % of biomorphs. The ecological diversity of the flora of the Kalinovka is characterized by 21 ecological groups (eco-groups). The quantitative indicators characterizing the ecological state of the aquatic ecotopes of the river, obtained by means of phytoindication are the following: mineralization – 0,6 g/dm3, water hardness – 5,56 mg/dm³, pH – 7,6–8,0. According to the indicator «total total trophicity of the reservoir», obtained by the phytoindicative way – a mesotrophic reservoir. According to the indicator «total saprobity of the reservoir» – a polluted water reservoir, beta-meso-saprobic. According to the hydrochemical analysis the water ecotopes are estimated in the following way: mineralization – 0.4 g/dm3, water hardness – 6.68 mg/dm³, pH – 7.64. According to the trophic level of mineral phosphorus it is a hypertrophic reservoir (0.853 mg/dm3), the concentration of ammonium ions in water – mesotrophic (0,242 mg / dm3), the concentration of nitrate ions in water – hypotrophic (less than 0,2 mg/dm3). The saprobic level according to BOD20 values corresponds to the alpha-mesosaprobic class, contaminated water (4,0 mgO2/dm3).