Microorganisms of various ecological-trophic groups in the saline ground waters of Primorsky Region (distribution, number, participation in accumulation of microelements)

Elena Lebedeva,Ivan Bragin,Natalia Kharitonova,Georgy Chelnokov,O Chudaev,R Millot,R Harmon,Y Kharaka,O Shouakar-Stash

doi:10.1051/e3sconf/20199802006

Elena Lebedeva, Ivan Bragin + Show 7 more

Open Access

https://doi.org/10.1051/e3sconf/20199802006

Copy DOI

Abstract

A small number of ecological-trophic groups of bacteria are noted in saline groundwater’s (30-50 g/L). The obtained data show, that thionic and halophilic forms of saprophytic bacteria dominated, developing in presence of 10% NaCl. Among saprophytic microorganisms, rod-shaped forms of the genus Microbacterium sp. significantly dominated. A significant accumulation of Cu, Co and light REEs by brine microbial communities is shown.

Highlights

The Rechitsa saline groundwater manifestation is located in the coastal area of Sukhodol Bay in the valley of the Sukhodol River [1,2]
The study results of physico-chemical composition carried out earlier showed that saline waters (total dissolved solids (TDS) = 31.8-50 g/L) are cold (10.3–12.1o C), neutral pH (6.74–7.63) and have chloride calcium and chloride sodium - calcium composition (Cl 20.2-22.3 g/L)
Microbiological studies of underground saline waters revealed the presence of small amount of functional groups of bacteria (4-5 out of 13), as well as their low number, which averaged 1.3×102 cells/ml (09.2013) - 4.1×102 cells/ml (07.2013) and their number was higher in summer periods

Summary

Introduction

The Rechitsa saline groundwater manifestation is located in the coastal area of Sukhodol Bay in the valley of the Sukhodol River [1,2]. Bacteria in groundwater play a great role in geochemical circulation of substances and are an important biotic factor. They actively impact on chemical composition of deep waters, mineral formation and metamorphism of rocks. Despite long-term observations of temperature and chemical composition of brines [1,2,3,4], there is no information about the microorganisms inhabiting them In this regard, the aim of this work was to study the distribution, number, composition of various ecological-trophic groups of bacteria, as well as the participation of microbial communities in accumulation of trace elements in the cold saline groundwater’s of Rechitsa

Objectives

Methods

Results

Conclusion