Bacterial Diversity of Historic Iron-Containing Water Sources of the Kaliningrad Region

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Abstract

The Kaliningrad region has a rich historical heritage, including several water sources with high iron content. Known since the end of the 19th century, they are rich in ferrous iron, which is oxidized by bacterial communities. They include many different taxonomic groups of bacteria. In this work, for the first time, profiling of microbial communities of iron-containing sources in the Kaliningrad region was carried out; During the study, 6 samples were taken from four geographical locations. Based on the results of profiling, taxonomic groups were identified belonging to the phyla Acidobacteriota, Desulfobacteriota, Cyanobacteriota, Proteobacteria, Nitrospirota, and among the predominant groups the gammaproteobacterium of the genus Gallionella stands out.

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About the authors

E. E. Suprunov

I. Kant Baltic Federal University

Email: Li.sun.v.29@gmail.com
Russian Federation, Kaliningrad, 236016

I. A. Shnurova

I. Kant Baltic Federal University

Email: Li.sun.v.29@gmail.com
Russian Federation, Kaliningrad, 236016

B. E. Efimenko

I. Kant Baltic Federal University

Email: Li.sun.v.29@gmail.com
Russian Federation, Kaliningrad, 236016

V. V. Lisun

I. Kant Baltic Federal University

Author for correspondence.
Email: Li.sun.v.29@gmail.com
Russian Federation, Kaliningrad, 236016

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2. Fig. 1. The general profile of microbial communities of sediments (a) and microbial mats (b) of the studied samples. The ratio of representatives of families within the phylum Pseudomonadota in sediments (c) and microbial mats (d).

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3. Fig. 2. Values of the Shannon and Simpson alpha diversity indices for sediment samples and microbial mats (a). A heat map showing differences in sample communities from different geographical points in the Kaliningrad region (b). The color of the square shows the similarity between each two samples. The range from blue to red corresponds to the similarity from near to far.

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