Академическое издательство «Гео»

Keywords: phytoplankton, saprobity, biogenous elements, water quality.



GEOGRAPHY AND NATURAL RESOURCES, 2014, № 3, p. 93-99

The present state of thewaters in the lower reach of the Yenisei river

A.Yu. Bessudova, L.M. Sorokovikova, A.D. Firsova, and I.V. Tomberg

annabessudova@mail.ru, lara@lin.irk.ru, firsova@lin.irk.ru, kaktus@lin.irk.ru

We discuss the results from comprehensive investigations made in autumn 2009 in the lower reach of the Yenisei between the site upstream of the settlement of Karaul and the river outlet in the Yenisei Gulf. A study was made of the parameters of the phytoplankton, and the saprobiological state of the waters was determined. The species of the genus Stephanodiscus constituted as much as 60 % of the total number of diatom species. According to the content level of biogenous elements, the relationship of species composition and the development intensity of the phytoplankton, currently the Yenisei can be assigned to the mesotrophic or eutrophic type.

Keywords: phytoplankton, saprobity, biogenous elements, water quality.
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