Water Seasonal Dynamics of Organic Compounds Distribution in the Raised Bog of Southern Taiga (Western Siberia)
O. V. SEREBRENNIKOVA1,2, E. B. STRELNIKOVA1, I. V. RUSSKIKH1, YU. A. KHARANZHEVSKAYA3,4, and E. S. VOISTINOVA3
1Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences, Tomsk, Russia
E-mail: rus@ipc.tsc.ru
2National Research Tomsk Polytechnic University, Tomsk, Russia
3Siberian Research Institute of Agriculture and Peat – Branch of SFSCA RAS, Tomsk, Russia
4National Research Tomsk State University, Tomsk, Russia
Keywords: bog waters, southern taiga in Western Siberia, organic matter, chemical composition, seasonal dynamics
Pages: 53-60
Abstract
The content and chemical composition of organic oil-soluble constituents (lipids) of the snow cover, peat and water of the Bakchar bog, which is the typical bog for southern taiga (the northeastern spurs of the Great Vasyugan Mire) were explored by gas chromatography-mass spectrometry. As shown, the composition of lipids in waters is exposed to seasonal fluctuations and formed due to compounds generated in a peat deposit and falling with atmospheric precipitation, and also to components of plants. Lipid content is linked to level dynamics of waters, the quantity of fallen atmospheric precipitation, and air temperature. The amount of lipidic components in waters is maximum in the beginning of spring; their composition is almost identical to peat compounds. When water is diluted with melting snow, lipid content is reduced. Herewith, the fraction of the main groups of lipids: n-alkanes, and n-aldehydes, and also cyclic mono- and sesquiterpenoids present in plants of the early growing season in the snow is increased. An increase in air temperature and a low amount of atmospheric precipitation lead to an increased fraction of lipids produced by water plants and compounds that are a part of conifer resin (dehydroabietic acid and its derivatives) in water. When the amount of rain precipitation is increased, the diversity of composition and lipid content are reduced in water; C25 and C27 n-alkanes, and also
carboxylic acids are prevailing in this case. A reduction of the amount of
atmospheric precipitation at the end of summer is accompanied by an increase in
the content of triterpenoids, steroids, long-chain esters of carboxylic acid,
and tocopherol in water. Furthermore, betulin and its derivatives typical for
birch, and also saturated oil hopane derivatives fallen to water resulting from
carrying out technical works appear at the survey plot. A month later, in
September, human activity products are removed from the waters; the content of
biological triterpenoids, and among them, α- and β-amyrin derivatives
enriched with red bilberry and cranberry is drastically increased.
DOI: 10.15372/CSD20190110
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