THE ROLE OF SALINITY AND ION COMPOSITION OF WATER IN THE FORMATION OF METHANE CONCENTRATIONS IN AQUATIC ECOSYSTEMS

Fedorov Yu.A.; Garkusha D.N.

THE ROLE OF SALINITY AND ION COMPOSITION OF WATER IN THE FORMATION OF METHANE CONCENTRATIONS IN AQUATIC ECOSYSTEMS

2021

Fedorov Yu.A. (Southern Federal University (SFedU)) | Garkusha D.N. (Southern Federal University (SFedU))

The present study examines the influence of ion composition and salinity of water on the formation of methaneconcentrations in water bodies. The research demonstrates that the influence of these factors on methane concentrations is notdefinitive. The main factors are the intensity of production and destruction processes that control the content of organic matterand redox conditions as well as the hydrological and morphometric parameters of water bodies that determine the distributionof lithological types of bottom deposits. The presence of a large number of salts, including sulfates in highly mineralized waterbodies with increased concentrations of labile organic matter in their water column and mud deposits, does not prevent thesimultaneous active flow of methanogenesis and sulfate reduction process due to reduced competition for nutrient substratesbetween sulfate-reducing microorganisms and methanogens

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