Biogeotransformation of bog ecosystems organic substance of Northern Eurasia

[摘要] In this paper, the results of complex research of the processes in a peat deposit are presented. A peat moss bog which formed under the geoclimatic conditions of Northern European Russia is used as an example. It is experimentally proved that the processes of drastic biogeotransformation of organic matter take place both in the peat-forming layer and in anaerobic conditions under the influence of exoenzymes and in acid conditions (a zone of conservation). This is shown by the physical-chemical, chemical, and microbiological parameters, as well as the stratigraphical flexibility of the indexes of oxidation-reduction potential (ORP), the chemical composition of organic substance, and the structure of microbiological peat communities. It is shown that while forming humic substances, the condensed and less unstable compounds, hydrolysis and assimilation of easy hydrolysable substances and some bitumen components by microorganisms significantly contribute to the biodegradation of peat organic matter. In spite of the fact that these substances are relatively stable, their composition and structure can vary along with other organic components of peat. This can significantly affect the geobarrier functions of peat deposits.

[发布机构] N Laverov Federal Center for Integrated Arctic Research Russian Academy of Sciences (FCIArctic RAS), Severnoi Dviny Emb., 23, Arkhangelsk; 163000, Russia^1

[效力级别] 计算机科学

[关键词] Anaerobic conditions;Chemical compositions;Micro-biological parameters;Northern Eurasia;Organic components;Organic substances;Oxidation reduction potential;Unstable compounds