MICROBIOLOGICAL CONDITIONS OF CHEMICAL ELEMENTS DISTRIBUTION ON PEAT DEPOSIT DEPTH IN ECOSYSTEMS OF THE VASYUGAN SWAMP EAST PART (WESTERN SIBERIA)

Abstract

Relevance of the research is determined by the necessity to account the interrelations between distribution of chemical elements on peat deposit depth, formation, evolution and degradation of bogs when solving a number of fundamental and applied problems of study, use and protection of bogs. The aim of the research is the estimation of microbiological conditions of chemical elements distribution on peat deposit depth and revealing of relations between geochemical and microbiological parameters of peats in east part of the Vasyugan swamp. Methods: methods of chemical and microbiological analysis (including MS-ICP), statistical methods. Results and conclusions. The authors have carried out chemical, mineralogical and microbiological analysis of peats and mineral ground samples. The samples were selected on the 9 of November, 2018 in east part of the Vasyugan swamp (border of a watershed of the Klyuch and Gavrilovka rivers which are the elements of a river network («Klyuch–Bakchar; Gavrilovka–Iksa–Chaya–Ob»; intraswamp ecological systems: the oligotrophic hollow-ridge complex, a ridge; the oligotrophic pine-dwarf-shrub-sphagnum raised bog (ryam), the mesotrophic border of an oligotrophic bog). It is shown that, first, the swamp microflora is a very important factor of chemical elements distribution on peat deposit depth in various intraswamp ecosystems in east part of the Vasyugan swamp. The probability of accumulation insoluble compounds of calcium, iron and rare earth elements in peats grows in amplification of microflora development unaerobic conditions. These factors determine increase of рН up to 7,8 and higher, that results in displacement carbonate balance and loss of insoluble calcium compounds. Second, the opportunity of iron hydroxides removing from a solution is the prominent feature of geochemistry of peat bogs on a background insignificant, but constantly observable activity of iron bacteria, which formed iron hydroxides. Thirdly, owing to sorption (and insoluble calcium compounds in the bottom layers of a peat deposit) hydrooxides, phosphates and carbonates (possibly sulfates and sulfides) of some microelements, including rare earth elements, are precipitated on iron hydrooxides.

Keywords

• microbiological conditions
• distribution of chemical elements
• peat deposit
• vasyugan swamp
• western siberia