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

• Published in: Doklady. Biochemistry and biophysics Vol. 491; no. 1; pp. 70 - 72
• Main Authors: Gladyshev, M. I., Glushchenko, L. A., Kravchuk, E. S., Anishchenko, O. V., Kolmakova, A. A., Kolobov, M. Y., Razgoniaeva, V. A., Sushchik, N. N.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.03.2020; Springer Nature B.V
• Subjects: Algae; Biochemistry; Biological and Medical Physics; Biomass; Biomedical and Life Sciences; Biophysics; Carbon - analysis; Chlorophyta - growth & development; Groundwater; Lakes; Life Sciences; Molecular Biology; Nitrogen; Nitrogen Isotopes - analysis; Nutrients; Phosphorus; Phosphorus - analysis; Russia; Spirogyra; Spirogyra - growth & development; Turbulence; Ulothrix; Water Microbiology; Water Pollutants, Chemical - analysis; Water Quality; Russia; Lake Baikal; “green tide,” green filamentous algae; inorganic nutrients; C:N:P stoichiometry
• ISSN: 1607-6729; 1608-3091
• DOI: 10.1134/S1607672920020088

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.