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Isotope Composition of Nitrogen and Stoichiometric Ratios of Elements in Biomass of Spirogyra in Lake Baikal

  • BIOCHEMISTRY, BIOPHYSICS, AND MOLECULAR BIOLOGY
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Abstract

Using stable isotope analysis of nitrogen, for the first time the hypothesis on different sources of inorganic nutrients for two groups of littoral algae in Lake Baikal was confirmed. Strongly attached filamentous algae of genus Ulothrix, which developed in the wave-braking zone at depth 0.5 m, and loosely attached filamentous algae of genus Spirogyra, which developed in deeper layers 3.0–5.0 m in a low-turbulence zone, get inorganic nutrients presumably from surface discharge and groundwater inputs, respectively. Besides, stoichiometric ratios C:N and N:P in biomass of the algae indicated that growth of Spirogyra in Lake Baikal was likely limited by nitrogen, while growth of Ulothrix was limited by phosphorus.

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Funding

The expedition was supported by the group of companies En+ Group and the Ecological Foundation of the Siberian Federal University. The study was performed under the State Assignment within the framework of the basic research program of the Russian Federation (topic no. 51.1.1).

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Authors and Affiliations

  1. Institute of Biophysics, Krasnoyarsk Scientific Center of the Russian Academy of Sciences, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

    M. I. Gladyshev, E. S. Kravchuk, O. V. Anishchenko, A. A. Kolmakova & N. N. Sushchik

  2. Siberian Federal University, 660041, Krasnoyarsk, Russia

    M. I. Gladyshev, L. A. Glushchenko & N. N. Sushchik

  3. Moscow State University, 119991, Moscow, Russia

    M. Y. Kolobov & V. A. Razgoniaeva

Authors
  1. M. I. Gladyshev
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  2. L. A. Glushchenko
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  3. E. S. Kravchuk
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  4. O. V. Anishchenko
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  5. A. A. Kolmakova
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  6. M. Y. Kolobov
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  7. V. A. Razgoniaeva
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  8. N. N. Sushchik
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Corresponding author

Correspondence to M. I. Gladyshev.

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The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants performed by any of the authors.

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Translated by M. Batrukova

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Gladyshev, M.I., Glushchenko, L.A., Kravchuk, E.S. et al. Isotope Composition of Nitrogen and Stoichiometric Ratios of Elements in Biomass of Spirogyra in Lake Baikal. Dokl Biochem Biophys 491, 70–72 (2020). https://doi.org/10.1134/S1607672920020088

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  • DOI: https://doi.org/10.1134/S1607672920020088

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